Annotation of loncom/interface/loncoursedata.pm, revision 1.155
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.155 ! albertel 3: # $Id: loncoursedata.pm,v 1.154 2006/02/05 19:10:19 bowersj2 Exp $
1.1 stredwic 4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ###
28:
29: =pod
30:
31: =head1 NAME
32:
33: loncoursedata
34:
35: =head1 SYNOPSIS
36:
1.22 stredwic 37: Set of functions that download and process student and course information.
1.1 stredwic 38:
39: =head1 PACKAGES USED
40:
41: Apache::Constants qw(:common :http)
42: Apache::lonnet()
1.22 stredwic 43: Apache::lonhtmlcommon
1.1 stredwic 44: HTML::TokeParser
45: GDBM_File
46:
47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
52: use Apache::Constants qw(:common :http);
1.146 albertel 53: use Apache::lonnet;
1.13 stredwic 54: use Apache::lonhtmlcommon;
1.57 matthew 55: use Time::HiRes;
56: use Apache::lonmysql;
1.1 stredwic 57: use HTML::TokeParser;
58: use GDBM_File;
59:
60: =pod
61:
62: =head1 DOWNLOAD INFORMATION
63:
1.22 stredwic 64: This section contains all the functions that get data from other servers
65: and/or itself.
1.1 stredwic 66:
67: =cut
68:
1.4 stredwic 69: sub LoadDiscussion {
1.13 stredwic 70: my ($courseID)=@_;
1.5 minaeibi 71: my %Discuss=();
72: my %contrib=&Apache::lonnet::dump(
73: $courseID,
1.146 albertel 74: $env{'course.'.$courseID.'.domain'},
75: $env{'course.'.$courseID.'.num'});
1.5 minaeibi 76:
77: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
78:
1.4 stredwic 79: foreach my $temp(keys %contrib) {
80: if ($temp=~/^version/) {
81: my $ver=$contrib{$temp};
82: my ($dummy,$prb)=split(':',$temp);
83: for (my $idx=1; $idx<=$ver; $idx++ ) {
84: my $name=$contrib{"$idx:$prb:sendername"};
1.5 minaeibi 85: $Discuss{"$name:$prb"}=$idx;
1.4 stredwic 86: }
87: }
88: }
1.5 minaeibi 89:
90: return \%Discuss;
1.1 stredwic 91: }
92:
1.71 matthew 93: ################################################
94: ################################################
95:
96: =pod
97:
1.47 matthew 98: =item &make_into_hash($values);
99:
100: Returns a reference to a hash as described by $values. $values is
101: assumed to be the result of
1.57 matthew 102: join(':',map {&Apache::lonnet::escape($_)} %orighash);
1.47 matthew 103:
104: This is a helper function for get_current_state.
105:
106: =cut
107:
108: ################################################
109: ################################################
110: sub make_into_hash {
111: my $values = shift;
112: my %tmp = map { &Apache::lonnet::unescape($_); }
113: split(':',$values);
114: return \%tmp;
115: }
116:
117:
118: ################################################
119: ################################################
120:
121: =pod
122:
1.57 matthew 123: =head1 LOCAL DATA CACHING SUBROUTINES
124:
125: The local caching is done using MySQL. There is no fall-back implementation
126: if MySQL is not running.
127:
128: The programmers interface is to call &get_current_state() or some other
129: primary interface subroutine (described below). The internals of this
130: storage system are documented here.
131:
132: There are six tables used to store student performance data (the results of
133: a dumpcurrent). Each of these tables is created in MySQL with a name of
134: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
135: for the table. The tables and their purposes are described below.
136:
137: Some notes before we get started.
138:
139: Each table must have a PRIMARY KEY, which is a column or set of columns which
140: will serve to uniquely identify a row of data. NULL is not allowed!
141:
142: INDEXes work best on integer data.
143:
144: JOIN is used to combine data from many tables into one output.
145:
146: lonmysql.pm is used for some of the interface, specifically the table creation
147: calls. The inserts are done in bulk by directly calling the database handler.
148: The SELECT ... JOIN statement used to retrieve the data does not have an
149: interface in lonmysql.pm and I shudder at the thought of writing one.
150:
151: =head3 Table Descriptions
152:
153: =over 4
154:
1.89 matthew 155: =item Tables used to store meta information
156:
157: The following tables hold data required to keep track of the current status
158: of a students data in the tables or to look up the students data in the tables.
159:
160: =over 4
161:
1.57 matthew 162: =item $symb_table
163:
164: The symb_table has two columns. The first is a 'symb_id' and the second
165: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
166: automatically by MySQL so inserts should be done on this table with an
167: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
168:
169: =item $part_table
170:
171: The part_table has two columns. The first is a 'part_id' and the second
172: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
173: generated automatically by MySQL so inserts should be done on this table with
174: an empty first element. This table has its PRIMARY KEY on the 'part' (100
175: characters) and a KEY on 'part_id'.
176:
177: =item $student_table
178:
1.113 matthew 179: The student_table has 7 columns. The first is a 'student_id' assigned by
180: MySQL. The second is 'student' which is username:domain. The third through
181: fifth are 'section', 'status' (enrollment status), and 'classification'
182: (to be used in the future). The sixth and seventh ('updatetime' and
183: 'fullupdatetime') contain the time of last update and full update of student
184: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
185: on 'student', 'section', and 'status'.
1.89 matthew 186:
187: =back
188:
189: =item Tables used to store current status data
190:
191: The following tables store data only about the students current status on
192: a problem, meaning only the data related to the last attempt on a problem.
193:
194: =over 4
1.57 matthew 195:
196: =item $performance_table
197:
198: The performance_table has 9 columns. The first three are 'symb_id',
199: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
200: and are directly related to the $symb_table, $student_table, and $part_table
201: described above. MySQL does better indexing on numeric items than text,
202: so we use these three "index tables". The remaining columns are
203: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
204: These are either the MySQL type TINYTEXT or various integers ('tries' and
205: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
206: For use of this table, see the functions described below.
207:
208: =item $parameters_table
209:
210: The parameters_table holds the data that does not fit neatly into the
211: performance_table. The parameters table has four columns: 'symb_id',
212: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
213: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
214: limited to 255 characters. 'value' is limited to 64k characters.
215:
216: =back
217:
1.89 matthew 218: =item Tables used for storing historic data
219:
220: The following tables are used to store almost all of the transactions a student
221: has made on a homework problem. See loncapa/docs/homework/datastorage for
222: specific information about each of the parameters stored.
223:
224: =over 4
225:
226: =item $fulldump_response_table
227:
228: The response table holds data (documented in loncapa/docs/homework/datastorage)
229: associated with a particular response id which is stored when a student
230: attempts a problem. The following are the columns of the table, in order:
231: 'symb_id','part_id','response_id','student_id','transaction','tries',
1.93 matthew 232: 'awarddetail', 'response_specific' (data particular to the response
1.89 matthew 233: type), 'response_specific_value', and 'submission (the text of the students
234: submission). The primary key is based on the first five columns listed above.
235:
236: =item $fulldump_part_table
237:
238: The part table holds data (documented in loncapa/docs/homework/datastorage)
239: associated with a particular part id which is stored when a student attempts
240: a problem. The following are the columns of the table, in order:
241: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
242: and 'previous'. The primary key is based on the first five columns listed
243: above.
244:
245: =item $fulldump_timestamp_table
246:
247: The timestamp table holds the timestamps of the transactions which are
248: stored in $fulldump_response_table and $fulldump_part_table. This data is
249: about both the response and part data. Columns: 'symb_id','student_id',
250: 'transaction', and 'timestamp'.
251: The primary key is based on the first 3 columns.
252:
1.127 matthew 253: =item $weight_table
254:
255: The weight table holds the weight for the problems used in the class.
256: Whereas the weight of a problem can vary by section and student the data
257: here is applied to the class as a whole.
258: Columns: 'symb_id','part_id','response_id','weight'.
259:
1.89 matthew 260: =back
261:
262: =back
263:
1.57 matthew 264: =head3 Important Subroutines
265:
266: Here is a brief overview of the subroutines which are likely to be of
267: interest:
268:
269: =over 4
270:
271: =item &get_current_state(): programmers interface.
272:
273: =item &init_dbs(): table creation
274:
275: =item &update_student_data(): data storage calls
276:
277: =item &get_student_data_from_performance_cache(): data retrieval
278:
279: =back
280:
281: =head3 Main Documentation
282:
283: =over 4
284:
285: =cut
286:
287: ################################################
288: ################################################
289:
290: ################################################
291: ################################################
1.89 matthew 292: { # Begin scope of table identifiers
1.57 matthew 293:
294: my $current_course ='';
295: my $symb_table;
296: my $part_table;
297: my $student_table;
298: my $performance_table;
299: my $parameters_table;
1.89 matthew 300: my $fulldump_response_table;
301: my $fulldump_part_table;
302: my $fulldump_timestamp_table;
1.127 matthew 303: my $weight_table;
1.57 matthew 304:
1.89 matthew 305: my @Tables;
1.57 matthew 306: ################################################
307: ################################################
308:
309: =pod
310:
311: =item &init_dbs()
312:
313: Input: course id
314:
315: Output: 0 on success, positive integer on error
316:
317: This routine issues the calls to lonmysql to create the tables used to
318: store student data.
319:
320: =cut
321:
322: ################################################
323: ################################################
324: sub init_dbs {
1.134 matthew 325: my ($courseid,$drop) = @_;
1.57 matthew 326: &setup_table_names($courseid);
327: #
1.73 matthew 328: # Drop any of the existing tables
1.134 matthew 329: if ($drop) {
330: foreach my $table (@Tables) {
331: &Apache::lonmysql::drop_table($table);
332: }
1.73 matthew 333: }
334: #
1.57 matthew 335: # Note - changes to this table must be reflected in the code that
336: # stores the data (calls &Apache::lonmysql::store_row with this table
337: # id
338: my $symb_table_def = {
339: id => $symb_table,
340: permanent => 'no',
341: columns => [{ name => 'symb_id',
342: type => 'MEDIUMINT UNSIGNED',
343: restrictions => 'NOT NULL',
344: auto_inc => 'yes', },
345: { name => 'symb',
346: type => 'MEDIUMTEXT',
347: restrictions => 'NOT NULL'},
348: ],
349: 'PRIMARY KEY' => ['symb_id'],
350: };
351: #
352: my $part_table_def = {
353: id => $part_table,
354: permanent => 'no',
355: columns => [{ name => 'part_id',
356: type => 'MEDIUMINT UNSIGNED',
357: restrictions => 'NOT NULL',
358: auto_inc => 'yes', },
359: { name => 'part',
1.132 matthew 360: type => 'VARCHAR(100) BINARY',
1.57 matthew 361: restrictions => 'NOT NULL'},
362: ],
363: 'PRIMARY KEY' => ['part (100)'],
364: 'KEY' => [{ columns => ['part_id']},],
365: };
366: #
367: my $student_table_def = {
368: id => $student_table,
369: permanent => 'no',
370: columns => [{ name => 'student_id',
371: type => 'MEDIUMINT UNSIGNED',
372: restrictions => 'NOT NULL',
373: auto_inc => 'yes', },
374: { name => 'student',
1.132 matthew 375: type => 'VARCHAR(100) BINARY',
1.113 matthew 376: restrictions => 'NOT NULL UNIQUE'},
377: { name => 'section',
1.132 matthew 378: type => 'VARCHAR(100) BINARY',
1.113 matthew 379: restrictions => 'NOT NULL'},
380: { name => 'status',
1.132 matthew 381: type => 'VARCHAR(15) BINARY',
1.57 matthew 382: restrictions => 'NOT NULL'},
1.85 matthew 383: { name => 'classification',
1.132 matthew 384: type => 'VARCHAR(100) BINARY', },
1.57 matthew 385: { name => 'updatetime',
1.89 matthew 386: type => 'INT UNSIGNED'},
387: { name => 'fullupdatetime',
388: type => 'INT UNSIGNED'},
1.57 matthew 389: ],
1.87 matthew 390: 'PRIMARY KEY' => ['student_id'],
1.113 matthew 391: 'KEY' => [{ columns => ['student (100)',
392: 'section (100)',
393: 'status (15)',]},],
1.57 matthew 394: };
395: #
396: my $performance_table_def = {
397: id => $performance_table,
398: permanent => 'no',
399: columns => [{ name => 'symb_id',
400: type => 'MEDIUMINT UNSIGNED',
401: restrictions => 'NOT NULL' },
402: { name => 'student_id',
403: type => 'MEDIUMINT UNSIGNED',
404: restrictions => 'NOT NULL' },
405: { name => 'part_id',
406: type => 'MEDIUMINT UNSIGNED',
407: restrictions => 'NOT NULL' },
1.73 matthew 408: { name => 'part',
1.132 matthew 409: type => 'VARCHAR(100) BINARY',
1.73 matthew 410: restrictions => 'NOT NULL'},
1.57 matthew 411: { name => 'solved',
412: type => 'TINYTEXT' },
413: { name => 'tries',
414: type => 'SMALLINT UNSIGNED' },
415: { name => 'awarded',
1.127 matthew 416: type => 'REAL' },
1.57 matthew 417: { name => 'award',
418: type => 'TINYTEXT' },
419: { name => 'awarddetail',
420: type => 'TINYTEXT' },
421: { name => 'timestamp',
422: type => 'INT UNSIGNED'},
423: ],
424: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
425: 'KEY' => [{ columns=>['student_id'] },
426: { columns=>['symb_id'] },],
427: };
428: #
1.89 matthew 429: my $fulldump_part_table_def = {
430: id => $fulldump_part_table,
431: permanent => 'no',
432: columns => [
433: { name => 'symb_id',
434: type => 'MEDIUMINT UNSIGNED',
435: restrictions => 'NOT NULL' },
436: { name => 'part_id',
437: type => 'MEDIUMINT UNSIGNED',
438: restrictions => 'NOT NULL' },
439: { name => 'student_id',
440: type => 'MEDIUMINT UNSIGNED',
441: restrictions => 'NOT NULL' },
442: { name => 'transaction',
443: type => 'MEDIUMINT UNSIGNED',
444: restrictions => 'NOT NULL' },
445: { name => 'tries',
446: type => 'SMALLINT UNSIGNED',
447: restrictions => 'NOT NULL' },
448: { name => 'award',
449: type => 'TINYTEXT' },
450: { name => 'awarded',
1.127 matthew 451: type => 'REAL' },
1.89 matthew 452: { name => 'previous',
453: type => 'SMALLINT UNSIGNED' },
454: # { name => 'regrader',
455: # type => 'TINYTEXT' },
456: # { name => 'afterduedate',
457: # type => 'TINYTEXT' },
458: ],
459: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
460: 'KEY' => [
461: { columns=>['symb_id'] },
462: { columns=>['part_id'] },
463: { columns=>['student_id'] },
464: ],
465: };
466: #
467: my $fulldump_response_table_def = {
468: id => $fulldump_response_table,
469: permanent => 'no',
470: columns => [
471: { name => 'symb_id',
472: type => 'MEDIUMINT UNSIGNED',
473: restrictions => 'NOT NULL' },
474: { name => 'part_id',
475: type => 'MEDIUMINT UNSIGNED',
476: restrictions => 'NOT NULL' },
477: { name => 'response_id',
478: type => 'MEDIUMINT UNSIGNED',
479: restrictions => 'NOT NULL' },
480: { name => 'student_id',
481: type => 'MEDIUMINT UNSIGNED',
482: restrictions => 'NOT NULL' },
483: { name => 'transaction',
484: type => 'MEDIUMINT UNSIGNED',
485: restrictions => 'NOT NULL' },
486: { name => 'awarddetail',
487: type => 'TINYTEXT' },
488: # { name => 'message',
1.132 matthew 489: # type => 'CHAR BINARY'},
1.89 matthew 490: { name => 'response_specific',
491: type => 'TINYTEXT' },
492: { name => 'response_specific_value',
493: type => 'TINYTEXT' },
494: { name => 'submission',
495: type => 'TEXT'},
496: ],
497: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
498: 'transaction'],
499: 'KEY' => [
500: { columns=>['symb_id'] },
501: { columns=>['part_id','response_id'] },
502: { columns=>['student_id'] },
503: ],
504: };
505: my $fulldump_timestamp_table_def = {
506: id => $fulldump_timestamp_table,
507: permanent => 'no',
508: columns => [
509: { name => 'symb_id',
510: type => 'MEDIUMINT UNSIGNED',
511: restrictions => 'NOT NULL' },
512: { name => 'student_id',
513: type => 'MEDIUMINT UNSIGNED',
514: restrictions => 'NOT NULL' },
515: { name => 'transaction',
516: type => 'MEDIUMINT UNSIGNED',
517: restrictions => 'NOT NULL' },
518: { name => 'timestamp',
519: type => 'INT UNSIGNED'},
520: ],
521: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
522: 'KEY' => [
523: { columns=>['symb_id'] },
524: { columns=>['student_id'] },
525: { columns=>['transaction'] },
526: ],
527: };
528: #
1.57 matthew 529: my $parameters_table_def = {
530: id => $parameters_table,
531: permanent => 'no',
532: columns => [{ name => 'symb_id',
533: type => 'MEDIUMINT UNSIGNED',
534: restrictions => 'NOT NULL' },
535: { name => 'student_id',
536: type => 'MEDIUMINT UNSIGNED',
537: restrictions => 'NOT NULL' },
538: { name => 'parameter',
539: type => 'TINYTEXT',
540: restrictions => 'NOT NULL' },
541: { name => 'value',
542: type => 'MEDIUMTEXT' },
543: ],
544: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
545: };
546: #
1.127 matthew 547: my $weight_table_def = {
548: id => $weight_table,
549: permanent => 'no',
550: columns => [{ name => 'symb_id',
551: type => 'MEDIUMINT UNSIGNED',
552: restrictions => 'NOT NULL' },
553: { name => 'part_id',
554: type => 'MEDIUMINT UNSIGNED',
555: restrictions => 'NOT NULL' },
556: { name => 'weight',
557: type => 'REAL',
558: restrictions => 'NOT NULL' },
559: ],
560: 'PRIMARY KEY' => ['symb_id','part_id'],
561: };
562: #
1.57 matthew 563: # Create the tables
564: my $tableid;
565: $tableid = &Apache::lonmysql::create_table($symb_table_def);
566: if (! defined($tableid)) {
567: &Apache::lonnet::logthis("error creating symb_table: ".
568: &Apache::lonmysql::get_error());
569: return 1;
570: }
571: #
572: $tableid = &Apache::lonmysql::create_table($part_table_def);
573: if (! defined($tableid)) {
574: &Apache::lonnet::logthis("error creating part_table: ".
575: &Apache::lonmysql::get_error());
576: return 2;
577: }
578: #
579: $tableid = &Apache::lonmysql::create_table($student_table_def);
580: if (! defined($tableid)) {
581: &Apache::lonnet::logthis("error creating student_table: ".
582: &Apache::lonmysql::get_error());
583: return 3;
584: }
585: #
586: $tableid = &Apache::lonmysql::create_table($performance_table_def);
587: if (! defined($tableid)) {
588: &Apache::lonnet::logthis("error creating preformance_table: ".
589: &Apache::lonmysql::get_error());
590: return 5;
591: }
592: #
593: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
594: if (! defined($tableid)) {
595: &Apache::lonnet::logthis("error creating parameters_table: ".
596: &Apache::lonmysql::get_error());
597: return 6;
598: }
1.89 matthew 599: #
600: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
601: if (! defined($tableid)) {
602: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
603: &Apache::lonmysql::get_error());
604: return 7;
605: }
606: #
607: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
608: if (! defined($tableid)) {
609: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
610: &Apache::lonmysql::get_error());
611: return 8;
612: }
613: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
614: if (! defined($tableid)) {
615: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
616: &Apache::lonmysql::get_error());
617: return 9;
618: }
1.127 matthew 619: $tableid = &Apache::lonmysql::create_table($weight_table_def);
620: if (! defined($tableid)) {
621: &Apache::lonnet::logthis("error creating weight_table: ".
622: &Apache::lonmysql::get_error());
623: return 10;
624: }
1.57 matthew 625: return 0;
1.70 matthew 626: }
627:
628: ################################################
629: ################################################
630:
631: =pod
632:
633: =item &delete_caches()
634:
1.144 matthew 635: This routine drops all the tables associated with a course from the
636: MySQL database.
637:
638: Input: course id (optional, determined by environment if omitted)
639:
640: Returns: nothing
641:
1.70 matthew 642: =cut
643:
644: ################################################
645: ################################################
646: sub delete_caches {
647: my $courseid = shift;
1.146 albertel 648: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.70 matthew 649: #
650: &setup_table_names($courseid);
651: #
652: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 653: foreach my $table (@Tables) {
1.70 matthew 654: my $command = 'DROP TABLE '.$table.';';
655: $dbh->do($command);
656: if ($dbh->err) {
657: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
658: }
659: }
660: return;
1.57 matthew 661: }
662:
663: ################################################
664: ################################################
665:
666: =pod
667:
668: =item &get_part_id()
669:
670: Get the MySQL id of a problem part string.
671:
672: Input: $part
673:
674: Output: undef on error, integer $part_id on success.
675:
676: =item &get_part()
677:
678: Get the string describing a part from the MySQL id of the problem part.
679:
680: Input: $part_id
681:
682: Output: undef on error, $part string on success.
683:
684: =cut
685:
686: ################################################
687: ################################################
688:
1.61 matthew 689: my $have_read_part_table = 0;
1.57 matthew 690: my %ids_by_part;
691: my %parts_by_id;
692:
693: sub get_part_id {
694: my ($part) = @_;
1.61 matthew 695: $part = 0 if (! defined($part));
696: if (! $have_read_part_table) {
697: my @Result = &Apache::lonmysql::get_rows($part_table);
698: foreach (@Result) {
699: $ids_by_part{$_->[1]}=$_->[0];
700: }
701: $have_read_part_table = 1;
702: }
1.57 matthew 703: if (! exists($ids_by_part{$part})) {
704: &Apache::lonmysql::store_row($part_table,[undef,$part]);
705: undef(%ids_by_part);
706: my @Result = &Apache::lonmysql::get_rows($part_table);
707: foreach (@Result) {
708: $ids_by_part{$_->[1]}=$_->[0];
709: }
710: }
711: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
712: return undef; # error
713: }
714:
715: sub get_part {
716: my ($part_id) = @_;
717: if (! exists($parts_by_id{$part_id}) ||
718: ! defined($parts_by_id{$part_id}) ||
719: $parts_by_id{$part_id} eq '') {
720: my @Result = &Apache::lonmysql::get_rows($part_table);
721: foreach (@Result) {
722: $parts_by_id{$_->[0]}=$_->[1];
723: }
724: }
725: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
726: return undef; # error
727: }
728:
729: ################################################
730: ################################################
731:
732: =pod
733:
734: =item &get_symb_id()
735:
736: Get the MySQL id of a symb.
737:
738: Input: $symb
739:
740: Output: undef on error, integer $symb_id on success.
741:
742: =item &get_symb()
743:
744: Get the symb associated with a MySQL symb_id.
745:
746: Input: $symb_id
747:
748: Output: undef on error, $symb on success.
749:
750: =cut
751:
752: ################################################
753: ################################################
754:
1.61 matthew 755: my $have_read_symb_table = 0;
1.57 matthew 756: my %ids_by_symb;
757: my %symbs_by_id;
758:
759: sub get_symb_id {
760: my ($symb) = @_;
1.61 matthew 761: if (! $have_read_symb_table) {
762: my @Result = &Apache::lonmysql::get_rows($symb_table);
763: foreach (@Result) {
764: $ids_by_symb{$_->[1]}=$_->[0];
765: }
766: $have_read_symb_table = 1;
767: }
1.57 matthew 768: if (! exists($ids_by_symb{$symb})) {
769: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
770: undef(%ids_by_symb);
771: my @Result = &Apache::lonmysql::get_rows($symb_table);
772: foreach (@Result) {
773: $ids_by_symb{$_->[1]}=$_->[0];
774: }
775: }
776: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
777: return undef; # error
778: }
779:
780: sub get_symb {
781: my ($symb_id) = @_;
782: if (! exists($symbs_by_id{$symb_id}) ||
783: ! defined($symbs_by_id{$symb_id}) ||
784: $symbs_by_id{$symb_id} eq '') {
785: my @Result = &Apache::lonmysql::get_rows($symb_table);
786: foreach (@Result) {
787: $symbs_by_id{$_->[0]}=$_->[1];
788: }
789: }
790: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
791: return undef; # error
792: }
793:
794: ################################################
795: ################################################
796:
797: =pod
798:
799: =item &get_student_id()
800:
801: Get the MySQL id of a student.
802:
803: Input: $sname, $dom
804:
805: Output: undef on error, integer $student_id on success.
806:
807: =item &get_student()
808:
809: Get student username:domain associated with the MySQL student_id.
810:
811: Input: $student_id
812:
813: Output: undef on error, string $student (username:domain) on success.
814:
815: =cut
816:
817: ################################################
818: ################################################
819:
1.61 matthew 820: my $have_read_student_table = 0;
1.57 matthew 821: my %ids_by_student;
822: my %students_by_id;
823:
824: sub get_student_id {
825: my ($sname,$sdom) = @_;
826: my $student = $sname.':'.$sdom;
1.61 matthew 827: if (! $have_read_student_table) {
828: my @Result = &Apache::lonmysql::get_rows($student_table);
829: foreach (@Result) {
830: $ids_by_student{$_->[1]}=$_->[0];
831: }
832: $have_read_student_table = 1;
833: }
1.57 matthew 834: if (! exists($ids_by_student{$student})) {
1.113 matthew 835: &populate_student_table();
1.57 matthew 836: undef(%ids_by_student);
1.113 matthew 837: undef(%students_by_id);
1.57 matthew 838: my @Result = &Apache::lonmysql::get_rows($student_table);
839: foreach (@Result) {
840: $ids_by_student{$_->[1]}=$_->[0];
841: }
842: }
843: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
844: return undef; # error
845: }
846:
847: sub get_student {
848: my ($student_id) = @_;
849: if (! exists($students_by_id{$student_id}) ||
850: ! defined($students_by_id{$student_id}) ||
851: $students_by_id{$student_id} eq '') {
852: my @Result = &Apache::lonmysql::get_rows($student_table);
853: foreach (@Result) {
854: $students_by_id{$_->[0]}=$_->[1];
855: }
856: }
857: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
858: return undef; # error
859: }
1.99 matthew 860:
1.113 matthew 861: sub populate_student_table {
862: my ($courseid) = @_;
863: if (! defined($courseid)) {
1.146 albertel 864: $courseid = $env{'request.course.id'};
1.113 matthew 865: }
866: #
867: &setup_table_names($courseid);
1.134 matthew 868: &init_dbs($courseid,0);
1.113 matthew 869: my $dbh = &Apache::lonmysql::get_dbh();
870: my $request = 'INSERT IGNORE INTO '.$student_table.
871: "(student,section,status) VALUES ";
1.150 albertel 872: my $cdom = $env{'course.'.$courseid.'.domain'};
873: my $cnum = $env{'course.'.$courseid.'.num'};
874: my $classlist = &get_classlist($cdom,$cnum);
1.113 matthew 875: my $student_count=0;
876: while (my ($student,$data) = each %$classlist) {
877: my ($section,$status) = ($data->[&CL_SECTION()],
878: $data->[&CL_STATUS()]);
879: if ($section eq '' || $section =~ /^\s*$/) {
880: $section = 'none';
881: }
882: $request .= "('".$student."','".$section."','".$status."'),";
883: $student_count++;
884: }
885: return if ($student_count == 0);
886: chop($request);
887: $dbh->do($request);
888: if ($dbh->err()) {
889: &Apache::lonnet::logthis("error ".$dbh->errstr().
890: " occured executing \n".
891: $request);
892: }
893: return;
894: }
895:
1.99 matthew 896: ################################################
897: ################################################
898:
899: =pod
900:
901: =item &clear_internal_caches()
902:
903: Causes the internal caches used in get_student_id, get_student,
904: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
905:
906: Needs to be called before the first operation with the MySQL database
907: for a given Apache request.
908:
909: =cut
910:
911: ################################################
912: ################################################
913: sub clear_internal_caches {
914: $have_read_part_table = 0;
915: undef(%ids_by_part);
916: undef(%parts_by_id);
917: $have_read_symb_table = 0;
918: undef(%ids_by_symb);
919: undef(%symbs_by_id);
920: $have_read_student_table = 0;
921: undef(%ids_by_student);
922: undef(%students_by_id);
923: }
924:
1.57 matthew 925: ################################################
926: ################################################
927:
928: =pod
929:
1.89 matthew 930: =item &update_full_student_data($sname,$sdom,$courseid)
931:
932: Does a lonnet::dump on a student to populate the courses tables.
933:
934: Input: $sname, $sdom, $courseid
935:
936: Output: $returnstatus
937:
938: $returnstatus is a string describing any errors that occured. 'okay' is the
939: default.
940:
941: This subroutine loads a students data using lonnet::dump and inserts
942: it into the MySQL database. The inserts are done on three tables,
943: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
944: The INSERT calls are made directly by this subroutine, not through lonmysql
945: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
946: compliant INSERT command to insert multiple rows at a time.
947: If anything has gone wrong during this process, $returnstatus is updated with
948: a description of the error.
949:
950: Once the "fulldump" tables are updated, the tables used for chart and
951: spreadsheet (which hold only the current state of the student on their
952: homework, not historical data) are updated. If all updates have occured
1.113 matthew 953: successfully, $student_table is updated to reflect the time of the update.
1.89 matthew 954:
955: Notice we do not insert the data and immediately query it. This means it
956: is possible for there to be data returned this first time that is not
957: available the second time. CYA.
958:
959: =cut
960:
961: ################################################
962: ################################################
963: sub update_full_student_data {
964: my ($sname,$sdom,$courseid) = @_;
965: #
966: # Set up database names
967: &setup_table_names($courseid);
968: #
969: my $student_id = &get_student_id($sname,$sdom);
970: my $student = $sname.':'.$sdom;
971: #
972: my $returnstatus = 'okay';
973: #
974: # Download students data
975: my $time_of_retrieval = time;
976: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
977: if (@tmp && $tmp[0] =~ /^error/) {
978: $returnstatus = 'error retrieving full student data';
979: return $returnstatus;
980: } elsif (! @tmp) {
981: $returnstatus = 'okay: no student data';
982: return $returnstatus;
983: }
984: my %studentdata = @tmp;
985: #
986: # Get database handle and clean out the tables
987: my $dbh = &Apache::lonmysql::get_dbh();
988: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
989: $student_id);
990: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
991: $student_id);
992: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
993: $student_id);
994: #
995: # Parse and store the data into a form we can handle
996: my $partdata;
997: my $respdata;
998: while (my ($key,$value) = each(%studentdata)) {
999: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1000: my ($transaction,$symb,$parameter) = split(':',$key);
1001: my $symb_id = &get_symb_id($symb);
1002: if ($parameter eq 'timestamp') {
1003: # We can deal with 'timestamp' right away
1004: my @timestamp_storage = ($symb_id,$student_id,
1005: $transaction,$value);
1.98 matthew 1006: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1007: " VALUES ('".join("','",@timestamp_storage)."');";
1008: $dbh->do($store_command);
1009: if ($dbh->err()) {
1010: &Apache::lonnet::logthis('unable to execute '.$store_command);
1011: &Apache::lonnet::logthis($dbh->errstr());
1012: }
1013: next;
1014: } elsif ($parameter eq 'version') {
1015: next;
1.90 matthew 1016: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1017: award|
1018: awarded|
1019: previous|
1020: solved|
1021: awarddetail|
1022: submission|
1023: submissiongrading|
1024: molecule)\s*$/x){
1.89 matthew 1025: # we do not have enough information to store an
1026: # entire row, so we save it up until later.
1027: my ($part_and_resp_id,$field) = ($1,$2);
1028: my ($part,$part_id,$resp,$resp_id);
1029: if ($part_and_resp_id =~ /\./) {
1030: ($part,$resp) = split(/\./,$part_and_resp_id);
1031: $part_id = &get_part_id($part);
1032: $resp_id = &get_part_id($resp);
1033: } else {
1034: $part_id = &get_part_id($part_and_resp_id);
1035: }
1.90 matthew 1036: # Deal with part specific data
1.89 matthew 1037: if ($field =~ /^(tries|award|awarded|previous)$/) {
1038: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1039: }
1.90 matthew 1040: # deal with response specific data
1.89 matthew 1041: if (defined($resp_id) &&
1.100 matthew 1042: $field =~ /^(awarddetail|
1.90 matthew 1043: submission|
1044: submissiongrading|
1045: molecule)$/x) {
1.89 matthew 1046: if ($field eq 'submission') {
1047: # We have to be careful with user supplied input.
1048: # most of the time we are okay because it is escaped.
1049: # However, there is one wrinkle: submissions which end in
1050: # and odd number of '\' cause insert errors to occur.
1051: # Best trap this somehow...
1.116 matthew 1052: $value = $dbh->quote($value);
1.89 matthew 1053: }
1.90 matthew 1054: if ($field eq 'submissiongrading' ||
1055: $field eq 'molecule') {
1056: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1057: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1058: } else {
1059: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1060: }
1.89 matthew 1061: }
1062: }
1063: }
1064: ##
1065: ## Store the part data
1.98 matthew 1066: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1067: ' VALUES '."\n";
1068: my $store_rows = 0;
1069: while (my ($symb_id,$hash1) = each (%$partdata)) {
1070: while (my ($part_id,$hash2) = each (%$hash1)) {
1071: while (my ($transaction,$data) = each (%$hash2)) {
1072: $store_command .= "('".join("','",$symb_id,$part_id,
1073: $student_id,
1074: $transaction,
1.101 matthew 1075: $data->{'tries'},
1.89 matthew 1076: $data->{'award'},
1077: $data->{'awarded'},
1078: $data->{'previous'})."'),";
1079: $store_rows++;
1080: }
1081: }
1082: }
1083: if ($store_rows) {
1084: chop($store_command);
1085: $dbh->do($store_command);
1086: if ($dbh->err) {
1087: $returnstatus = 'error storing part data';
1088: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1089: &Apache::lonnet::logthis("While attempting\n".$store_command);
1090: }
1091: }
1092: ##
1093: ## Store the response data
1.98 matthew 1094: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1095: ' VALUES '."\n";
1096: $store_rows = 0;
1097: while (my ($symb_id,$hash1) = each (%$respdata)) {
1098: while (my ($part_id,$hash2) = each (%$hash1)) {
1099: while (my ($resp_id,$hash3) = each (%$hash2)) {
1100: while (my ($transaction,$data) = each (%$hash3)) {
1.112 matthew 1101: my $submission = $data->{'submission'};
1102: # We have to be careful with user supplied input.
1103: # most of the time we are okay because it is escaped.
1104: # However, there is one wrinkle: submissions which end in
1105: # and odd number of '\' cause insert errors to occur.
1106: # Best trap this somehow...
1107: $submission = $dbh->quote($submission);
1108: $store_command .= "('".
1109: join("','",$symb_id,$part_id,
1110: $resp_id,$student_id,
1111: $transaction,
1112: $data->{'awarddetail'},
1113: $data->{'response_specific'},
1114: $data->{'response_specific_value'}).
1115: "',".$submission."),";
1.89 matthew 1116: $store_rows++;
1117: }
1118: }
1119: }
1120: }
1121: if ($store_rows) {
1122: chop($store_command);
1123: $dbh->do($store_command);
1124: if ($dbh->err) {
1125: $returnstatus = 'error storing response data';
1126: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1127: &Apache::lonnet::logthis("While attempting\n".$store_command);
1128: }
1129: }
1130: ##
1131: ## Update the students "current" data in the performance
1132: ## and parameters tables.
1133: my ($status,undef) = &store_student_data
1134: ($sname,$sdom,$courseid,
1135: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1136: if ($returnstatus eq 'okay' && $status ne 'okay') {
1137: $returnstatus = 'error storing current data:'.$status;
1138: } elsif ($status ne 'okay') {
1139: $returnstatus .= ' error storing current data:'.$status;
1140: }
1141: ##
1142: ## Update the students time......
1143: if ($returnstatus eq 'okay') {
1.113 matthew 1144: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1145: if ($dbh->err) {
1146: if ($returnstatus eq 'okay') {
1147: $returnstatus = 'error updating student time';
1148: } else {
1149: $returnstatus = 'error updating student time';
1150: }
1151: }
1.89 matthew 1152: }
1153: return $returnstatus;
1154: }
1155:
1156: ################################################
1157: ################################################
1158:
1159: =pod
1160:
1.57 matthew 1161: =item &update_student_data()
1162:
1163: Input: $sname, $sdom, $courseid
1164:
1165: Output: $returnstatus, \%student_data
1166:
1167: $returnstatus is a string describing any errors that occured. 'okay' is the
1168: default.
1169: \%student_data is the data returned by a call to lonnet::currentdump.
1170:
1171: This subroutine loads a students data using lonnet::currentdump and inserts
1172: it into the MySQL database. The inserts are done on two tables,
1173: $performance_table and $parameters_table. $parameters_table holds the data
1174: that is not included in $performance_table. See the description of
1175: $performance_table elsewhere in this file. The INSERT calls are made
1176: directly by this subroutine, not through lonmysql because we do a 'bulk'
1177: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1178: insert multiple rows at a time. If anything has gone wrong during this
1179: process, $returnstatus is updated with a description of the error and
1180: \%student_data is returned.
1181:
1182: Notice we do not insert the data and immediately query it. This means it
1183: is possible for there to be data returned this first time that is not
1184: available the second time. CYA.
1185:
1186: =cut
1187:
1188: ################################################
1189: ################################################
1190: sub update_student_data {
1191: my ($sname,$sdom,$courseid) = @_;
1192: #
1.60 matthew 1193: # Set up database names
1194: &setup_table_names($courseid);
1195: #
1.57 matthew 1196: my $student_id = &get_student_id($sname,$sdom);
1197: my $student = $sname.':'.$sdom;
1198: #
1199: my $returnstatus = 'okay';
1200: #
1201: # Download students data
1202: my $time_of_retrieval = time;
1203: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1204: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1205: &Apache::lonnet::logthis('error getting data for '.
1206: $sname.':'.$sdom.' in course '.$courseid.
1207: ':'.$tmp[0]);
1208: $returnstatus = 'error getting data';
1.79 matthew 1209: return ($returnstatus,undef);
1.57 matthew 1210: }
1211: if (scalar(@tmp) < 1) {
1212: return ('no data',undef);
1213: }
1214: my %student_data = @tmp;
1.89 matthew 1215: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1216: #
1217: # Set the students update time
1.96 matthew 1218: if ($Results[0] eq 'okay') {
1.148 matthew 1219: &store_updatetime($student_id,$time_of_retrieval);
1.95 matthew 1220: }
1.89 matthew 1221: #
1222: return @Results;
1223: }
1224:
1.113 matthew 1225: sub store_updatetime {
1226: my ($student_id,$updatetime,$fullupdatetime)=@_;
1227: my $values = '';
1228: if (defined($updatetime)) {
1229: $values = 'updatetime='.$updatetime.' ';
1230: }
1231: if (defined($fullupdatetime)) {
1232: if ($values ne '') {
1233: $values .= ',';
1234: }
1235: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1236: }
1237: return if ($values eq '');
1238: my $dbh = &Apache::lonmysql::get_dbh();
1239: my $request = 'UPDATE '.$student_table.' SET '.$values.
1240: ' WHERE student_id='.$student_id.' LIMIT 1';
1241: $dbh->do($request);
1242: }
1243:
1.89 matthew 1244: sub store_student_data {
1245: my ($sname,$sdom,$courseid,$student_data) = @_;
1246: #
1247: my $student_id = &get_student_id($sname,$sdom);
1248: my $student = $sname.':'.$sdom;
1249: #
1250: my $returnstatus = 'okay';
1.57 matthew 1251: #
1252: # Remove all of the students data from the table
1.60 matthew 1253: my $dbh = &Apache::lonmysql::get_dbh();
1254: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1255: $student_id);
1256: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1257: $student_id);
1.57 matthew 1258: #
1259: # Store away the data
1260: #
1261: my $starttime = Time::HiRes::time;
1262: my $elapsed = 0;
1263: my $rows_stored;
1.98 matthew 1264: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1265: ' VALUES '."\n";
1.61 matthew 1266: my $num_parameters = 0;
1.98 matthew 1267: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1268: ' VALUES '."\n";
1.79 matthew 1269: return ('error',undef) if (! defined($dbh));
1.89 matthew 1270: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1271: #
1272: # make sure the symb is set up properly
1273: my $symb_id = &get_symb_id($current_symb);
1274: #
1.147 matthew 1275: # Parameters
1.63 matthew 1276: while (my ($parameter,$value) = each(%$param_hash)) {
1277: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.147 matthew 1278: my $sql_parameter = "('".join("','",
1279: $symb_id,$student_id,
1280: $parameter)."',".
1281: $dbh->quote($value)."),\n";
1.61 matthew 1282: $num_parameters ++;
1.147 matthew 1283: if ($sql_parameter !~ /''/) {
1284: $store_parameters_command .= $sql_parameter;
1.149 albertel 1285: #$rows_stored++;
1.57 matthew 1286: }
1287: }
1.147 matthew 1288: }
1289: # Performance
1290: my %stored;
1291: while (my ($parameter,$value) = each(%$param_hash)) {
1292: next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
1293: my $part = $1;
1.151 albertel 1294: next if ($part =~ /\./);
1.147 matthew 1295: next if (exists($stored{$part}));
1296: $stored{$part}++;
1.57 matthew 1297: #
1298: my $part_id = &get_part_id($part);
1299: next if (!defined($part_id));
1300: my $solved = $value;
1301: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1302: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1303: my $award = $param_hash->{'resource.'.$part.'.award'};
1304: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1305: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1306: #
1.74 matthew 1307: $solved = '' if (! defined($solved));
1.57 matthew 1308: $tries = '' if (! defined($tries));
1309: $awarded = '' if (! defined($awarded));
1310: $award = '' if (! defined($award));
1311: $awarddetail = '' if (! defined($awarddetail));
1.147 matthew 1312: my $sql_performance =
1313: "('".join("','",$symb_id,$student_id,$part_id,$part,
1314: $solved,$tries,$awarded,$award,
1315: $awarddetail,$timestamp)."'),\n";
1316: $store_performance_command .= $sql_performance;
1.57 matthew 1317: $rows_stored++;
1318: }
1319: }
1.149 albertel 1320: if (! $rows_stored) { return ($returnstatus, undef); }
1.147 matthew 1321: $store_parameters_command =~ s|,\n$||;
1322: $store_performance_command =~ s|,\n$||;
1.57 matthew 1323: my $start = Time::HiRes::time;
1.94 matthew 1324: $dbh->do($store_performance_command);
1325: if ($dbh->err()) {
1.147 matthew 1326: &Apache::lonnet::logthis('performance bigass insert error:'.
1327: $dbh->errstr());
1328: &Apache::lonnet::logthis('command = '.$/.$store_performance_command);
1.94 matthew 1329: $returnstatus = 'error: unable to insert performance into database';
1330: return ($returnstatus,$student_data);
1331: }
1.61 matthew 1332: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1333: if ($dbh->err()) {
1.147 matthew 1334: &Apache::lonnet::logthis('parameters bigass insert error:'.
1335: $dbh->errstr());
1336: &Apache::lonnet::logthis('command = '.$/.$store_parameters_command);
1.87 matthew 1337: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1338: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1339: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1340: return ($returnstatus,$student_data);
1.57 matthew 1341: }
1342: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1343: return ($returnstatus,$student_data);
1.57 matthew 1344: }
1345:
1.89 matthew 1346: ######################################
1347: ######################################
1.57 matthew 1348:
1349: =pod
1350:
1.89 matthew 1351: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1352:
1.89 matthew 1353: Checks to be sure the MySQL tables for the given class are set up.
1354: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1355:
1.89 matthew 1356: Returns nothing on success and 'error' on failure
1.57 matthew 1357:
1358: =cut
1359:
1.89 matthew 1360: ######################################
1361: ######################################
1362: sub ensure_tables_are_set_up {
1363: my ($courseid) = @_;
1.146 albertel 1364: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1365: #
1366: # Clean out package variables
1.57 matthew 1367: &setup_table_names($courseid);
1368: #
1369: # if the tables do not exist, make them
1370: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.113 matthew 1371: my ($found_symb,$found_student,$found_part,
1.89 matthew 1372: $found_performance,$found_parameters,$found_fulldump_part,
1.127 matthew 1373: $found_fulldump_response,$found_fulldump_timestamp,
1374: $found_weight);
1.57 matthew 1375: foreach (@CurrentTable) {
1376: $found_symb = 1 if ($_ eq $symb_table);
1377: $found_student = 1 if ($_ eq $student_table);
1378: $found_part = 1 if ($_ eq $part_table);
1379: $found_performance = 1 if ($_ eq $performance_table);
1380: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1381: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1382: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1383: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.127 matthew 1384: $found_weight = 1 if ($_ eq $weight_table);
1.57 matthew 1385: }
1.127 matthew 1386: if (!$found_symb ||
1387: !$found_student || !$found_part ||
1388: !$found_performance || !$found_parameters ||
1.89 matthew 1389: !$found_fulldump_part || !$found_fulldump_response ||
1.127 matthew 1390: !$found_fulldump_timestamp || !$found_weight ) {
1.134 matthew 1391: if (&init_dbs($courseid,1)) {
1.89 matthew 1392: return 'error';
1.57 matthew 1393: }
1394: }
1.89 matthew 1395: }
1396:
1397: ################################################
1398: ################################################
1399:
1400: =pod
1401:
1402: =item &ensure_current_data()
1403:
1404: Input: $sname, $sdom, $courseid
1405:
1406: Output: $status, $data
1407:
1408: This routine ensures the data for a given student is up to date.
1.113 matthew 1409: The $student_table is queried to determine the time of the last update.
1.89 matthew 1410: If the students data is out of date, &update_student_data() is called.
1411: The return values from the call to &update_student_data() are returned.
1412:
1413: =cut
1414:
1415: ################################################
1416: ################################################
1417: sub ensure_current_data {
1418: my ($sname,$sdom,$courseid) = @_;
1419: my $status = 'okay'; # return value
1420: #
1.146 albertel 1421: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1422: &ensure_tables_are_set_up($courseid);
1.57 matthew 1423: #
1424: # Get the update time for the user
1425: my $updatetime = 0;
1.60 matthew 1426: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1427: ($sdom,$sname,$courseid.'.db',
1428: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1429: #
1.87 matthew 1430: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1431: my @Result = &Apache::lonmysql::get_rows($student_table,
1.87 matthew 1432: "student_id ='$student_id'");
1.57 matthew 1433: my $data = undef;
1434: if (@Result) {
1.113 matthew 1435: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1.57 matthew 1436: }
1437: if ($modifiedtime > $updatetime) {
1438: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1439: }
1440: return ($status,$data);
1441: }
1442:
1443: ################################################
1444: ################################################
1445:
1446: =pod
1447:
1.89 matthew 1448: =item &ensure_current_full_data($sname,$sdom,$courseid)
1449:
1450: Input: $sname, $sdom, $courseid
1451:
1452: Output: $status
1453:
1454: This routine ensures the fulldata (the data from a lonnet::dump, not a
1455: lonnet::currentdump) for a given student is up to date.
1.113 matthew 1456: The $student_table is queried to determine the time of the last update.
1.89 matthew 1457: If the students fulldata is out of date, &update_full_student_data() is
1458: called.
1459:
1460: The return value from the call to &update_full_student_data() is returned.
1461:
1462: =cut
1463:
1464: ################################################
1465: ################################################
1466: sub ensure_current_full_data {
1467: my ($sname,$sdom,$courseid) = @_;
1468: my $status = 'okay'; # return value
1469: #
1.146 albertel 1470: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1471: &ensure_tables_are_set_up($courseid);
1472: #
1473: # Get the update time for the user
1474: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1475: ($sdom,$sname,$courseid.'.db',
1476: $Apache::lonnet::perlvar{'lonUsersDir'});
1477: #
1478: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1479: my @Result = &Apache::lonmysql::get_rows($student_table,
1.89 matthew 1480: "student_id ='$student_id'");
1481: my $updatetime;
1482: if (@Result && ref($Result[0]) eq 'ARRAY') {
1.113 matthew 1483: $updatetime = $Result[0]->[6];
1.89 matthew 1484: }
1485: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1486: $status = &update_full_student_data($sname,$sdom,$courseid);
1487: }
1488: return $status;
1489: }
1490:
1491: ################################################
1492: ################################################
1493:
1494: =pod
1495:
1.57 matthew 1496: =item &get_student_data_from_performance_cache()
1497:
1498: Input: $sname, $sdom, $symb, $courseid
1499:
1500: Output: hash reference containing the data for the given student.
1501: If $symb is undef, all the students data is returned.
1502:
1503: This routine is the heart of the local caching system. See the description
1504: of $performance_table, $symb_table, $student_table, and $part_table. The
1505: main task is building the MySQL request. The tables appear in the request
1506: in the order in which they should be parsed by MySQL. When searching
1507: on a student the $student_table is used to locate the 'student_id'. All
1508: rows in $performance_table which have a matching 'student_id' are returned,
1509: with data from $part_table and $symb_table which match the entries in
1510: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1511: the $symb_table is processed first, with matching rows grabbed from
1512: $performance_table and filled in from $part_table and $student_table in
1513: that order.
1514:
1515: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1516: interesting, especially if you play with the order the tables are listed.
1517:
1518: =cut
1519:
1520: ################################################
1521: ################################################
1522: sub get_student_data_from_performance_cache {
1523: my ($sname,$sdom,$symb,$courseid)=@_;
1524: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1525: &setup_table_names($courseid);
1.57 matthew 1526: #
1527: # Return hash
1528: my $studentdata;
1529: #
1530: my $dbh = &Apache::lonmysql::get_dbh();
1531: my $request = "SELECT ".
1.73 matthew 1532: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1533: "a.timestamp ";
1.57 matthew 1534: if (defined($student)) {
1535: $request .= "FROM $student_table AS b ".
1536: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1537: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1538: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1539: "WHERE student='$student'";
1540: if (defined($symb) && $symb ne '') {
1.67 matthew 1541: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1542: }
1543: } elsif (defined($symb) && $symb ne '') {
1544: $request .= "FROM $symb_table as d ".
1545: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1546: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1547: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1548: "WHERE symb='".$dbh->quote($symb)."'";
1549: }
1550: my $starttime = Time::HiRes::time;
1551: my $rows_retrieved = 0;
1552: my $sth = $dbh->prepare($request);
1553: $sth->execute();
1554: if ($sth->err()) {
1555: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1556: &Apache::lonnet::logthis("\n".$request."\n");
1557: &Apache::lonnet::logthis("error is:".$sth->errstr());
1558: return undef;
1559: }
1560: foreach my $row (@{$sth->fetchall_arrayref}) {
1561: $rows_retrieved++;
1.63 matthew 1562: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1563: (@$row);
1564: my $base = 'resource.'.$part;
1565: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1566: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1567: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1568: $studentdata->{$symb}->{$base.'.award'} = $award;
1569: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1570: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1571: }
1.97 matthew 1572: ## Get misc parameters
1573: $request = 'SELECT c.symb,a.parameter,a.value '.
1574: "FROM $student_table AS b ".
1575: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1576: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1577: "WHERE student='$student'";
1578: if (defined($symb) && $symb ne '') {
1579: $request .= " AND c.symb=".$dbh->quote($symb);
1580: }
1581: $sth = $dbh->prepare($request);
1582: $sth->execute();
1583: if ($sth->err()) {
1584: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1585: &Apache::lonnet::logthis("\n".$request."\n");
1586: &Apache::lonnet::logthis("error is:".$sth->errstr());
1587: if (defined($symb) && $symb ne '') {
1588: $studentdata = $studentdata->{$symb};
1589: }
1590: return $studentdata;
1591: }
1592: #
1593: foreach my $row (@{$sth->fetchall_arrayref}) {
1594: $rows_retrieved++;
1595: my ($symb,$parameter,$value) = (@$row);
1596: $studentdata->{$symb}->{$parameter} = $value;
1597: }
1598: #
1.67 matthew 1599: if (defined($symb) && $symb ne '') {
1600: $studentdata = $studentdata->{$symb};
1.57 matthew 1601: }
1602: return $studentdata;
1603: }
1604:
1605: ################################################
1606: ################################################
1607:
1608: =pod
1609:
1610: =item &get_current_state()
1611:
1612: Input: $sname,$sdom,$symb,$courseid
1613:
1614: Output: Described below
1.46 matthew 1615:
1.47 matthew 1616: Retrieve the current status of a students performance. $sname and
1.46 matthew 1617: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1618: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1619: If $courseid is undef it will be retrieved from the environment.
1620:
1621: The return structure is based on &Apache::lonnet::currentdump. If
1622: $symb is unspecified, all the students data is returned in a hash of
1623: the form:
1624: (
1625: symb1 => { param1 => value1, param2 => value2 ... },
1626: symb2 => { param1 => value1, param2 => value2 ... },
1627: )
1628:
1629: If $symb is specified, a hash of
1630: (
1631: param1 => value1,
1632: param2 => value2,
1633: )
1634: is returned.
1635:
1.57 matthew 1636: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1637: an empty list is returned.
1638:
1639: =cut
1640:
1641: ################################################
1642: ################################################
1643: sub get_current_state {
1.47 matthew 1644: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1645: #
1.146 albertel 1646: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.47 matthew 1647: #
1.61 matthew 1648: return () if (! defined($sname) || ! defined($sdom));
1649: #
1.57 matthew 1650: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1651: # &Apache::lonnet::logthis
1652: # ('sname = '.$sname.
1653: # ' domain = '.$sdom.
1654: # ' status = '.$status.
1655: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1656: # while (my ($symb,$hash) = each(%$data)) {
1657: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1658: # while (my ($key,$value) = each (%$hash)) {
1659: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1660: # }
1661: # }
1.47 matthew 1662: #
1.79 matthew 1663: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1664: return %{$data->{$symb}};
1665: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1666: return %$data;
1667: }
1668: if ($status eq 'no data') {
1.57 matthew 1669: return ();
1670: } else {
1671: if ($status ne 'okay' && $status ne '') {
1672: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1673: return ();
1674: }
1.57 matthew 1675: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1676: $symb,$courseid);
1677: return %$returnhash if (defined($returnhash));
1.46 matthew 1678: }
1.57 matthew 1679: return ();
1.61 matthew 1680: }
1681:
1682: ################################################
1683: ################################################
1684:
1685: =pod
1686:
1687: =item &get_problem_statistics()
1688:
1689: Gather data on a given problem. The database is assumed to be
1690: populated and all local caching variables are assumed to be set
1691: properly. This means you need to call &ensure_current_data for
1692: the students you are concerned with prior to calling this routine.
1693:
1.124 matthew 1694: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1.61 matthew 1695:
1.64 matthew 1696: =over 4
1697:
1.124 matthew 1698: =item $Sections Array ref containing section names for students.
1699: 'all' is allowed to be the first (and only) item in the array.
1700:
1701: =item $status String describing the status of students
1.64 matthew 1702:
1703: =item $symb is the symb for the problem.
1704:
1705: =item $part is the part id you need statistics for
1706:
1707: =item $courseid is the course id, of course!
1708:
1.122 matthew 1709: =item $starttime and $endtime are unix times which to use to limit
1710: the statistical data.
1711:
1.64 matthew 1712: =back
1713:
1.66 matthew 1714: Outputs: See the code for up to date information. A hash reference is
1715: returned. The hash has the following keys defined:
1.64 matthew 1716:
1717: =over 4
1718:
1.66 matthew 1719: =item num_students The number of students attempting the problem
1720:
1721: =item tries The total number of tries for the students
1722:
1723: =item max_tries The maximum number of tries taken
1724:
1725: =item mean_tries The average number of tries
1726:
1727: =item num_solved The number of students able to solve the problem
1728:
1729: =item num_override The number of students whose answer is 'correct_by_override'
1730:
1731: =item deg_of_diff The degree of difficulty of the problem
1732:
1733: =item std_tries The standard deviation of the number of tries
1734:
1735: =item skew_tries The skew of the number of tries
1.64 matthew 1736:
1.66 matthew 1737: =item per_wrong The number of students attempting the problem who were not
1738: able to answer it correctly.
1.64 matthew 1739:
1740: =back
1741:
1.61 matthew 1742: =cut
1743:
1744: ################################################
1745: ################################################
1746: sub get_problem_statistics {
1.122 matthew 1747: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1.61 matthew 1748: return if (! defined($symb) || ! defined($part));
1.146 albertel 1749: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1750: #
1.100 matthew 1751: &setup_table_names($courseid);
1.61 matthew 1752: my $symb_id = &get_symb_id($symb);
1753: my $part_id = &get_part_id($part);
1754: my $stats_table = $courseid.'_problem_stats';
1755: #
1756: my $dbh = &Apache::lonmysql::get_dbh();
1757: return undef if (! defined($dbh));
1758: #
1.123 matthew 1759: # Clean out the table
1.61 matthew 1760: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1761: my $request =
1.115 matthew 1762: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1763: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1764: 'FROM '.$performance_table.' AS a ';
1.123 matthew 1765: #
1766: # See if we need to include some requirements on the students
1.115 matthew 1767: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1768: (defined($status) && lc($status) ne 'any')) {
1769: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1770: }
1771: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.123 matthew 1772: #
1773: # Limit the students included to those specified
1.115 matthew 1774: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1.64 matthew 1775: $request .= ' AND ('.
1.115 matthew 1776: join(' OR ', map { "b.section='".$_."'" } @$Sections
1.64 matthew 1777: ).')';
1778: }
1.115 matthew 1779: if (defined($status) && lc($status) ne 'any') {
1780: $request .= " AND b.status='".$status."'";
1.122 matthew 1781: }
1782: #
1.123 matthew 1783: # Limit by starttime and endtime
1.122 matthew 1784: my $time_requirements = undef;
1785: if (defined($starttime)) {
1786: $time_requirements .= 'a.timestamp>='.$starttime;
1787: if (defined($endtime)) {
1788: $time_requirements .= ' AND a.timestamp<='.$endtime;
1789: }
1790: } elsif (defined($endtime)) {
1791: $time_requirements .= 'a.timestamp<='.$endtime;
1792: }
1793: if (defined($time_requirements)) {
1794: $request .= ' AND '.$time_requirements;
1.115 matthew 1795: }
1.123 matthew 1796: #
1797: # Finally, execute the request to create the temporary table
1.61 matthew 1798: $dbh->do($request);
1.123 matthew 1799: #
1800: # Collect the first suite of statistics
1.128 matthew 1801: $request = 'SELECT COUNT(*),SUM(tries),'.
1802: 'AVG(tries),STD(tries) '.
1.109 matthew 1803: 'FROM '.$stats_table;
1.128 matthew 1804: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1.109 matthew 1805: ($dbh,$request);
1.128 matthew 1806: #
1807: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
1808: ' WHERE awarded>0';
1809: if (defined($time_requirements)) {
1810: $request .= ' AND '.$time_requirements;
1811: }
1812: my ($max,$min) = &execute_SQL_request($dbh,$request);
1813: #
1.109 matthew 1814: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1.128 matthew 1815: if (defined($time_requirements)) {
1816: $request .= ' AND '.$time_requirements;
1817: }
1.109 matthew 1818: my ($Solved) = &execute_SQL_request($dbh,$request);
1.128 matthew 1819: #
1.109 matthew 1820: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
1821: " WHERE solved='correct_by_override'";
1.128 matthew 1822: if (defined($time_requirements)) {
1823: $request .= ' AND '.$time_requirements;
1824: }
1.109 matthew 1825: my ($solved) = &execute_SQL_request($dbh,$request);
1826: #
1.133 matthew 1827: $Solved -= $solved;
1828: #
1.61 matthew 1829: $num = 0 if (! defined($num));
1830: $tries = 0 if (! defined($tries));
1.128 matthew 1831: $max = 0 if (! defined($max));
1832: $min = 0 if (! defined($min));
1.61 matthew 1833: $STD = 0 if (! defined($STD));
1.133 matthew 1834: $Solved = 0 if (! defined($Solved) || $Solved < 0);
1.61 matthew 1835: $solved = 0 if (! defined($solved));
1836: #
1.123 matthew 1837: # Compute the more complicated statistics
1.61 matthew 1838: my $DegOfDiff = 'nan';
1.66 matthew 1839: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.123 matthew 1840: #
1.61 matthew 1841: my $SKEW = 'nan';
1.66 matthew 1842: my $wrongpercent = 0;
1.128 matthew 1843: my $numwrong = 'nan';
1.61 matthew 1844: if ($num > 0) {
1845: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1846: 'POWER(tries - '.$STD.',3)'.
1847: '))/'.$num.' FROM '.$stats_table);
1.128 matthew 1848: $numwrong = $num-$Solved;
1849: $wrongpercent=int(10*100*$numwrong/$num)/10;
1.61 matthew 1850: }
1851: #
1.123 matthew 1852: # Drop the temporary table
1853: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1854: #
1855: # Return result
1.66 matthew 1856: return { num_students => $num,
1857: tries => $tries,
1.128 matthew 1858: max_tries => $max,
1859: min_tries => $min,
1.66 matthew 1860: mean_tries => $mean,
1861: std_tries => $STD,
1862: skew_tries => $SKEW,
1863: num_solved => $Solved,
1864: num_override => $solved,
1.128 matthew 1865: num_wrong => $numwrong,
1.66 matthew 1866: per_wrong => $wrongpercent,
1.81 matthew 1867: deg_of_diff => $DegOfDiff };
1.61 matthew 1868: }
1869:
1.127 matthew 1870: ##
1871: ## This is a helper for get_statistics
1.61 matthew 1872: sub execute_SQL_request {
1873: my ($dbh,$request)=@_;
1874: # &Apache::lonnet::logthis($request);
1875: my $sth = $dbh->prepare($request);
1.153 albertel 1876: if (!$sth) {
1877: die($dbh->errstr . " SQL: $request");
1878: }
1.61 matthew 1879: $sth->execute();
1880: my $row = $sth->fetchrow_arrayref();
1881: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1882: return @$row;
1883: }
1884: return ();
1885: }
1.123 matthew 1886:
1.127 matthew 1887: ######################################################
1888: ######################################################
1889:
1890: =pod
1891:
1892: =item &populate_weight_table
1893:
1894: =cut
1895:
1896: ######################################################
1897: ######################################################
1898: sub populate_weight_table {
1899: my ($courseid) = @_;
1900: if (! defined($courseid)) {
1.146 albertel 1901: $courseid = $env{'request.course.id'};
1.127 matthew 1902: }
1903: #
1904: &setup_table_names($courseid);
1.144 matthew 1905: my $navmap = Apache::lonnavmaps::navmap->new();
1906: if (!defined($navmap)) {
1907: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1908: ' unable to get navmaps resource'.$/.
1909: ' '.join(' ',(caller)));
1910: return;
1911: }
1912: my @sequences = $navmap->retrieveResources(undef,
1913: sub { shift->is_map(); },1,0,1);
1914: my @resources;
1915: foreach my $seq (@sequences) {
1916: push(@resources,$navmap->retrieveResources($seq,
1917: sub {shift->is_problem();},
1918: 0,0,0));
1919: }
1920: if (! scalar(@resources)) {
1921: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1922: ' no resources returned for '.$courseid);
1.127 matthew 1923: return;
1924: }
1925: # Since we use lonnet::EXT to retrieve problem weights,
1926: # to ensure current data we must clear the caches out.
1927: &Apache::lonnet::clear_EXT_cache_status();
1928: my $dbh = &Apache::lonmysql::get_dbh();
1929: my $request = 'INSERT IGNORE INTO '.$weight_table.
1930: "(symb_id,part_id,weight) VALUES ";
1931: my $weight;
1.144 matthew 1932: foreach my $res (@resources) {
1933: my $symb_id = &get_symb_id($res->symb);
1934: foreach my $part (@{$res->parts}) {
1.127 matthew 1935: my $part_id = &get_part_id($part);
1936: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.144 matthew 1937: $res->symb,
1.127 matthew 1938: undef,undef,undef);
1939: if (!defined($weight) || ($weight eq '')) {
1940: $weight=1;
1941: }
1942: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
1943: }
1944: }
1945: $request =~ s/(,)$//;
1946: # &Apache::lonnet::logthis('request = '.$/.$request);
1947: $dbh->do($request);
1948: if ($dbh->err()) {
1949: &Apache::lonnet::logthis("error ".$dbh->errstr().
1950: " occured executing \n".
1951: $request);
1952: }
1953: return;
1954: }
1955:
1956: ##########################################################
1957: ##########################################################
1.61 matthew 1958:
1.127 matthew 1959: =pod
1960:
1.129 matthew 1961: =item &limit_by_start_end_times
1962:
1963: Build SQL WHERE condition which limits the data collected by the start
1964: and end times provided
1965:
1966: Inputs: $starttime, $endtime, $table
1967:
1968: Returns: $time_limits
1969:
1970: =cut
1971:
1972: ##########################################################
1973: ##########################################################
1974: sub limit_by_start_end_time {
1975: my ($starttime,$endtime,$table) = @_;
1976: my $time_requirements = undef;
1977: if (defined($starttime)) {
1978: $time_requirements .= $table.".timestamp>='".$starttime."'";
1979: if (defined($endtime)) {
1980: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
1981: }
1982: } elsif (defined($endtime)) {
1983: $time_requirements .= $table.".timestamp<='".$endtime."'";
1984: }
1985: return $time_requirements;
1986: }
1987:
1988: ##########################################################
1989: ##########################################################
1990:
1991: =pod
1992:
1.127 matthew 1993: =item &limit_by_section_and_status
1994:
1995: Build SQL WHERE condition which limits the data collected by section and
1996: student status.
1997:
1998: Inputs: $Sections (array ref)
1999: $enrollment (string: 'any', 'expired', 'active')
2000: $tablename The name of the table that holds the student data
2001:
2002: Returns: $student_requirements,$enrollment_requirements
2003:
2004: =cut
2005:
2006: ##########################################################
2007: ##########################################################
2008: sub limit_by_section_and_status {
2009: my ($Sections,$enrollment,$tablename) = @_;
2010: my $student_requirements = undef;
2011: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2012: $student_requirements = '('.
2013: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2014: ).')';
2015: }
2016: #
2017: my $enrollment_requirements=undef;
2018: if (defined($enrollment) && $enrollment ne 'Any') {
2019: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2020: }
2021: return ($student_requirements,$enrollment_requirements);
2022: }
2023:
2024: ######################################################
2025: ######################################################
2026:
2027: =pod
2028:
2029: =item rank_students_by_scores_on_resources
2030:
2031: Inputs:
2032: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2033: $Sections: array ref of sections to include,
2034: $enrollment: string,
2035: $courseid (may be omitted)
1.154 bowersj2 2036: $starttime (may be omitted)
2037: $endtime (may be omitted)
2038: $has_award_for (may be omitted)
1.127 matthew 2039:
2040: Returns; An array of arrays. The sub arrays contain a student name and
1.154 bowersj2 2041: their score on the resources. $starttime and $endtime constrain the
2042: list to awards obtained during the given time limits. $has_score_on
2043: constrains the list to those students who at least attempted the
2044: resource identified by the given symb, which is used to filter out
2045: such students for statistics that would be adversely affected by such
2046: students.
1.127 matthew 2047:
2048: =cut
2049:
2050: ######################################################
2051: ######################################################
2052: sub RNK_student { return 0; };
2053: sub RNK_score { return 1; };
2054:
2055: sub rank_students_by_scores_on_resources {
1.154 bowersj2 2056: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime,$has_award_for) = @_;
1.127 matthew 2057: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2058: if (! defined($courseid)) {
1.146 albertel 2059: $courseid = $env{'request.course.id'};
1.127 matthew 2060: }
2061: #
2062: &setup_table_names($courseid);
2063: my $dbh = &Apache::lonmysql::get_dbh();
2064: my ($section_limits,$enrollment_limits)=
2065: &limit_by_section_and_status($Sections,$enrollment,'b');
2066: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2067: } @$resources
2068: ).')';
1.154 bowersj2 2069: my ($award_col, $award_join, $award_clause) = ('', '', '');
1.155 ! albertel 2070: if ($has_award_for) {
1.154 bowersj2 2071: my $resource_id = &get_symb_id($has_award_for);
2072: $award_col = ", perf.awarded";
2073: $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id"
2074: ." = $resource_id AND perf.student_id = b.student_id ";
2075: $award_clause = "AND perf.awarded IS NOT NULL";
2076: }
1.130 matthew 2077: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.154 bowersj2 2078: my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score "
2079: ."$award_col FROM $performance_table AS a ".
2080: "NATURAL LEFT JOIN $weight_table AS w ".
2081: "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ".
2082: "$award_join WHERE ";
1.127 matthew 2083: if (defined($section_limits)) {
2084: $request .= $section_limits.' AND ';
2085: }
2086: if (defined($enrollment_limits)) {
2087: $request .= $enrollment_limits.' AND ';
2088: }
1.130 matthew 2089: if (defined($time_limits)) {
2090: $request .= $time_limits.' AND ';
2091: }
1.127 matthew 2092: if ($symb_limits ne '()') {
2093: $request .= $symb_limits.' AND ';
2094: }
2095: $request =~ s/( AND )$//; # Remove extra conjunction
2096: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
1.154 bowersj2 2097: $request .= " $award_clause GROUP BY a.student_id ORDER BY score";
1.127 matthew 2098: #&Apache::lonnet::logthis('request = '.$/.$request);
1.154 bowersj2 2099: my $sth = $dbh->prepare($request) or die "Can't prepare $request";
1.127 matthew 2100: $sth->execute();
2101: my $rows = $sth->fetchall_arrayref();
2102: return ($rows);
2103: }
2104:
2105: ########################################################
2106: ########################################################
2107:
2108: =pod
2109:
2110: =item &get_sum_of_scores
2111:
2112: Inputs: $resource (hash ref, needs {'symb'} key),
2113: $part, (the part id),
2114: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2115: $courseid
2116:
2117: Returns: the sum of the score on the problem part over the students and the
2118: maximum possible value for the sum (taken from the weight table).
2119:
2120: =cut
2121:
2122: ########################################################
2123: ########################################################
2124: sub get_sum_of_scores {
1.143 matthew 2125: my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
1.127 matthew 2126: if (! defined($courseid)) {
1.146 albertel 2127: $courseid = $env{'request.course.id'};
1.127 matthew 2128: }
1.138 matthew 2129: if (defined($students) &&
2130: ((@$students == 0) ||
2131: (@$students == 1 && (! defined($students->[0]) ||
2132: $students->[0] eq ''))
2133: )
2134: ){
2135: undef($students);
2136: }
1.127 matthew 2137: #
2138: &setup_table_names($courseid);
2139: my $dbh = &Apache::lonmysql::get_dbh();
1.130 matthew 2140: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.127 matthew 2141: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2142: $performance_table.' AS a '.
2143: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
1.143 matthew 2144: $request .= 'WHERE a.symb_id='.&get_symb_id($symb).
1.127 matthew 2145: ' AND a.part_id='.&get_part_id($part);
1.130 matthew 2146: if (defined($time_limits)) {
2147: $request .= ' AND '.$time_limits;
2148: }
1.127 matthew 2149: if (defined($students)) {
2150: $request .= ' AND ('.
2151: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2152: } @$students).
2153: ')';
2154: }
2155: my $sth = $dbh->prepare($request);
2156: $sth->execute();
2157: my $rows = $sth->fetchrow_arrayref();
2158: if ($dbh->err) {
1.138 matthew 2159: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
2160: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
2161: $/.$request);
1.127 matthew 2162: return (undef,undef);
2163: }
2164: return ($rows->[0],$rows->[1]);
2165: }
2166:
1.129 matthew 2167: ########################################################
2168: ########################################################
2169:
2170: =pod
2171:
2172: =item &score_stats
2173:
2174: Inputs: $Sections, $enrollment, $symbs, $starttime,
2175: $endtime, $courseid
2176:
2177: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2178: elsewhere in this module.
2179: $symbs is an array ref of symbs
2180:
2181: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2182: possible of student scores on the given resources
2183:
2184: =cut
2185:
2186: ########################################################
2187: ########################################################
2188: sub score_stats {
2189: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2190: if (! defined($courseid)) {
1.146 albertel 2191: $courseid = $env{'request.course.id'};
1.129 matthew 2192: }
2193: #
2194: &setup_table_names($courseid);
2195: my $dbh = &Apache::lonmysql::get_dbh();
2196: #
2197: my ($section_limits,$enrollment_limits)=
2198: &limit_by_section_and_status($Sections,$enrollment,'b');
2199: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2200: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2201: #
2202: my $stats_table = $courseid.'_problem_stats';
2203: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2204: my $request = 'DROP TABLE '.$stats_table;
2205: $dbh->do($request);
2206: $request =
2207: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2208: 'SELECT a.student_id,'.
2209: 'SUM(a.awarded*w.weight) AS score FROM '.
2210: $performance_table.' AS a '.
2211: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2212: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2213: 'WHERE ('.$symb_restriction.')';
2214: if ($time_limits) {
2215: $request .= ' AND '.$time_limits;
2216: }
2217: if ($section_limits) {
2218: $request .= ' AND '.$section_limits;
2219: }
2220: if ($enrollment_limits) {
2221: $request .= ' AND '.$enrollment_limits;
2222: }
2223: $request .= ' GROUP BY a.student_id';
2224: # &Apache::lonnet::logthis('request = '.$/.$request);
2225: my $sth = $dbh->prepare($request);
2226: $sth->execute();
2227: $request =
2228: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2229: 'FROM '.$stats_table;
2230: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2231: # &Apache::lonnet::logthis('request = '.$/.$request);
2232:
2233: $request = 'SELECT SUM(weight) FROM '.$weight_table.
1.152 bowersj2 2234: ' AS a WHERE ('.$symb_restriction.')';
1.129 matthew 2235: my ($max_possible) = &execute_SQL_request($dbh,$request);
2236: # &Apache::lonnet::logthis('request = '.$/.$request);
2237: return($min,$max,$ave,$std,$count,$max_possible);
2238: }
2239:
2240:
2241: ########################################################
2242: ########################################################
2243:
2244: =pod
2245:
2246: =item &count_stats
2247:
2248: Inputs: $Sections, $enrollment, $symbs, $starttime,
2249: $endtime, $courseid
2250:
2251: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2252: elsewhere in this module.
2253: $symbs is an array ref of symbs
2254:
2255: Returns: minimum, maximum, mean, s.d., and number of students
2256: of the number of items correct on the given resources
2257:
2258: =cut
2259:
2260: ########################################################
2261: ########################################################
2262: sub count_stats {
2263: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2264: if (! defined($courseid)) {
1.146 albertel 2265: $courseid = $env{'request.course.id'};
1.129 matthew 2266: }
2267: #
2268: &setup_table_names($courseid);
2269: my $dbh = &Apache::lonmysql::get_dbh();
2270: #
2271: my ($section_limits,$enrollment_limits)=
2272: &limit_by_section_and_status($Sections,$enrollment,'b');
2273: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2274: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2275: #
2276: my $stats_table = $courseid.'_problem_stats';
2277: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2278: my $request = 'DROP TABLE '.$stats_table;
2279: $dbh->do($request);
2280: $request =
2281: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2282: 'SELECT a.student_id,'.
1.151 albertel 2283: 'SUM(a.awarded) AS count FROM '.
1.129 matthew 2284: $performance_table.' AS a '.
2285: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1.151 albertel 2286: 'WHERE ('.$symb_restriction.')';
1.129 matthew 2287: if ($time_limits) {
2288: $request .= ' AND '.$time_limits;
2289: }
2290: if ($section_limits) {
2291: $request .= ' AND '.$section_limits;
2292: }
2293: if ($enrollment_limits) {
2294: $request .= ' AND '.$enrollment_limits;
2295: }
2296: $request .= ' GROUP BY a.student_id';
1.131 matthew 2297: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2298: my $sth = $dbh->prepare($request);
2299: $sth->execute();
2300: $request =
2301: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2302: 'FROM '.$stats_table;
2303: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1.131 matthew 2304: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2305: return($min,$max,$ave,$std,$count);
2306: }
1.127 matthew 2307:
2308: ######################################################
2309: ######################################################
2310:
2311: =pod
2312:
2313: =item get_student_data
2314:
2315: =cut
2316:
2317: ######################################################
2318: ######################################################
1.105 matthew 2319: sub get_student_data {
2320: my ($students,$courseid) = @_;
1.146 albertel 2321: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.105 matthew 2322: &setup_table_names($courseid);
2323: my $dbh = &Apache::lonmysql::get_dbh();
2324: return undef if (! defined($dbh));
2325: my $request = 'SELECT '.
2326: 'student_id, student '.
2327: 'FROM '.$student_table;
2328: if (defined($students)) {
2329: $request .= ' WHERE ('.
2330: join(' OR ', map {'student_id='.
2331: &get_student_id($_->{'username'},
2332: $_->{'domain'})
2333: } @$students
2334: ).')';
2335: }
2336: $request.= ' ORDER BY student_id';
2337: my $sth = $dbh->prepare($request);
2338: $sth->execute();
2339: if ($dbh->err) {
1.138 matthew 2340: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
2341: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2342: return undef;
2343: }
2344: my $dataset = $sth->fetchall_arrayref();
2345: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2346: return $dataset;
2347: }
2348: }
2349:
1.108 matthew 2350: sub RD_student_id { return 0; }
2351: sub RD_awarddetail { return 1; }
2352: sub RD_response_eval { return 2; }
2353: sub RD_submission { return 3; }
2354: sub RD_timestamp { return 4; }
2355: sub RD_tries { return 5; }
2356: sub RD_sname { return 6; }
2357:
2358: sub get_response_data {
1.126 matthew 2359: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
1.103 matthew 2360: return undef if (! defined($symb) ||
1.100 matthew 2361: ! defined($response));
1.146 albertel 2362: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.100 matthew 2363: #
2364: &setup_table_names($courseid);
2365: my $symb_id = &get_symb_id($symb);
1.137 matthew 2366: if (! defined($symb_id)) {
2367: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2368: return undef;
2369: }
1.100 matthew 2370: my $response_id = &get_part_id($response);
1.137 matthew 2371: if (! defined($response_id)) {
2372: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2373: return undef;
2374: }
1.100 matthew 2375: #
2376: my $dbh = &Apache::lonmysql::get_dbh();
2377: return undef if (! defined($dbh));
1.126 matthew 2378: #
1.127 matthew 2379: my ($student_requirements,$enrollment_requirements) =
2380: &limit_by_section_and_status($Sections,$enrollment,'d');
1.100 matthew 2381: my $request = 'SELECT '.
1.105 matthew 2382: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.108 matthew 2383: 'a.submission, b.timestamp, c.tries, d.student '.
1.100 matthew 2384: 'FROM '.$fulldump_response_table.' AS a '.
2385: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2386: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2387: 'a.transaction = b.transaction '.
2388: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2389: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2390: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 matthew 2391: 'LEFT JOIN '.$student_table.' AS d '.
2392: 'ON a.student_id=d.student_id '.
1.100 matthew 2393: 'WHERE '.
2394: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1.126 matthew 2395: if (defined($student_requirements) || defined($enrollment_requirements)) {
2396: $request .= ' AND ';
2397: if (defined($student_requirements)) {
2398: $request .= $student_requirements.' AND ';
2399: }
2400: if (defined($enrollment_requirements)) {
2401: $request .= $enrollment_requirements.' AND ';
2402: }
2403: $request =~ s/( AND )$//;
1.100 matthew 2404: }
2405: $request .= ' ORDER BY b.timestamp';
1.103 matthew 2406: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2407: my $sth = $dbh->prepare($request);
2408: $sth->execute();
1.105 matthew 2409: if ($dbh->err) {
1.138 matthew 2410: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
2411: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2412: return undef;
2413: }
1.100 matthew 2414: my $dataset = $sth->fetchall_arrayref();
2415: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.117 matthew 2416: # Clear the \'s from around the submission
2417: for (my $i =0;$i<scalar(@$dataset);$i++) {
2418: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2419: }
1.103 matthew 2420: return $dataset;
1.100 matthew 2421: }
1.118 matthew 2422: }
2423:
2424:
2425: sub RDs_awarddetail { return 3; }
2426: sub RDs_submission { return 2; }
2427: sub RDs_timestamp { return 1; }
2428: sub RDs_tries { return 0; }
1.119 matthew 2429: sub RDs_awarded { return 4; }
1.118 matthew 2430:
2431: sub get_response_data_by_student {
2432: my ($student,$symb,$response,$courseid) = @_;
2433: return undef if (! defined($symb) ||
2434: ! defined($response));
1.146 albertel 2435: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.118 matthew 2436: #
2437: &setup_table_names($courseid);
2438: my $symb_id = &get_symb_id($symb);
2439: my $response_id = &get_part_id($response);
2440: #
2441: my $student_id = &get_student_id($student->{'username'},
2442: $student->{'domain'});
2443: #
2444: my $dbh = &Apache::lonmysql::get_dbh();
2445: return undef if (! defined($dbh));
2446: my $request = 'SELECT '.
1.119 matthew 2447: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
1.118 matthew 2448: 'FROM '.$fulldump_response_table.' AS a '.
2449: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2450: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2451: 'a.transaction = b.transaction '.
2452: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2453: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2454: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2455: 'LEFT JOIN '.$student_table.' AS d '.
2456: 'ON a.student_id=d.student_id '.
1.119 matthew 2457: 'LEFT JOIN '.$performance_table.' AS e '.
2458: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2459: 'a.student_id=e.student_id AND c.tries=e.tries '.
1.118 matthew 2460: 'WHERE '.
2461: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2462: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
1.125 matthew 2463: # &Apache::lonnet::logthis("request =\n".$request);
1.118 matthew 2464: my $sth = $dbh->prepare($request);
2465: $sth->execute();
2466: if ($dbh->err) {
1.138 matthew 2467: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2468: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.118 matthew 2469: return undef;
2470: }
2471: my $dataset = $sth->fetchall_arrayref();
2472: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2473: # Clear the \'s from around the submission
2474: for (my $i =0;$i<scalar(@$dataset);$i++) {
2475: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2476: }
2477: return $dataset;
2478: }
2479: return undef; # error occurred
1.106 matthew 2480: }
1.108 matthew 2481:
2482: sub RT_student_id { return 0; }
2483: sub RT_awarded { return 1; }
2484: sub RT_tries { return 2; }
2485: sub RT_timestamp { return 3; }
1.106 matthew 2486:
2487: sub get_response_time_data {
1.142 matthew 2488: my ($sections,$enrollment,$symb,$part,$courseid) = @_;
1.106 matthew 2489: return undef if (! defined($symb) ||
1.107 matthew 2490: ! defined($part));
1.146 albertel 2491: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.106 matthew 2492: #
2493: &setup_table_names($courseid);
2494: my $symb_id = &get_symb_id($symb);
1.142 matthew 2495: if (! defined($symb_id)) {
2496: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2497: return undef;
2498: }
1.107 matthew 2499: my $part_id = &get_part_id($part);
1.142 matthew 2500: if (! defined($part_id)) {
2501: &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid);
2502: return undef;
2503: }
1.106 matthew 2504: #
2505: my $dbh = &Apache::lonmysql::get_dbh();
2506: return undef if (! defined($dbh));
1.142 matthew 2507: my ($student_requirements,$enrollment_requirements) =
2508: &limit_by_section_and_status($sections,$enrollment,'d');
1.106 matthew 2509: my $request = 'SELECT '.
1.107 matthew 2510: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2511: 'FROM '.$fulldump_part_table.' AS a '.
1.142 matthew 2512: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2513: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2514: 'a.transaction = b.transaction '.
2515: 'LEFT JOIN '.$student_table.' as d '.
2516: 'ON a.student_id=d.student_id '.
1.106 matthew 2517: 'WHERE '.
1.107 matthew 2518: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.142 matthew 2519: if (defined($student_requirements) || defined($enrollment_requirements)) {
2520: $request .= ' AND ';
2521: if (defined($student_requirements)) {
2522: $request .= $student_requirements.' AND ';
2523: }
2524: if (defined($enrollment_requirements)) {
2525: $request .= $enrollment_requirements.' AND ';
2526: }
2527: $request =~ s/( AND )$//;
1.106 matthew 2528: }
2529: $request .= ' ORDER BY b.timestamp';
2530: # &Apache::lonnet::logthis("request =\n".$request);
2531: my $sth = $dbh->prepare($request);
2532: $sth->execute();
2533: if ($dbh->err) {
1.138 matthew 2534: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2535: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.106 matthew 2536: return undef;
2537: }
2538: my $dataset = $sth->fetchall_arrayref();
2539: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2540: return $dataset;
2541: }
2542:
1.100 matthew 2543: }
1.61 matthew 2544:
2545: ################################################
2546: ################################################
2547:
2548: =pod
2549:
1.116 matthew 2550: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
1.113 matthew 2551:
2552: =cut
2553:
2554: ################################################
2555: ################################################
2556: sub get_student_scores {
1.145 matthew 2557: my ($sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
1.146 albertel 2558: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.113 matthew 2559: &setup_table_names($courseid);
2560: my $dbh = &Apache::lonmysql::get_dbh();
2561: return (undef) if (! defined($dbh));
2562: my $tmptable = $courseid.'_temp_'.time;
1.145 matthew 2563: my $request = 'DROP TABLE IF EXISTS '.$tmptable;
2564: # &Apache::lonnet::logthis('request = '.$/.$request);
2565: $dbh->do($request);
1.114 matthew 2566: #
2567: my $symb_requirements;
1.113 matthew 2568: if (defined($Symbs) && @$Symbs) {
2569: $symb_requirements = '('.
1.114 matthew 2570: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
1.121 matthew 2571: "' AND a.part_id='".&get_part_id($_->{'part'}).
2572: "')"
1.113 matthew 2573: } @$Symbs).')';
2574: }
1.114 matthew 2575: #
1.145 matthew 2576: my ($student_requirements,$enrollment_requirements) =
2577: &limit_by_section_and_status($sections,$enrollment,'b');
1.114 matthew 2578: #
1.145 matthew 2579: my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
1.114 matthew 2580: ##
1.145 matthew 2581: $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2582: ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
1.114 matthew 2583: $performance_table.' AS a ';
1.145 matthew 2584: $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
1.114 matthew 2585: if (defined($student_requirements) || defined($enrollment_requirements)) {
1.145 matthew 2586: $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id';
1.114 matthew 2587: }
2588: if (defined($symb_requirements) ||
2589: defined($student_requirements) ||
2590: defined($enrollment_requirements) ) {
1.113 matthew 2591: $request .= ' WHERE ';
2592: }
1.114 matthew 2593: if (defined($symb_requirements)) {
2594: $request .= $symb_requirements.' AND ';
2595: }
2596: if (defined($student_requirements)) {
2597: $request .= $student_requirements.' AND ';
2598: }
2599: if (defined($enrollment_requirements)) {
2600: $request .= $enrollment_requirements.' AND ';
2601: }
1.121 matthew 2602: if (defined($time_requirements)) {
2603: $request .= $time_requirements.' AND ';
2604: }
2605: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
1.114 matthew 2606: $request .= ' GROUP BY a.student_id';
2607: # &Apache::lonnet::logthis("request = \n".$request);
1.113 matthew 2608: my $sth = $dbh->prepare($request);
2609: $sth->execute();
2610: if ($dbh->err) {
1.138 matthew 2611: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2612: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2613: return undef;
2614: }
2615: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2616: # &Apache::lonnet::logthis("request = \n".$request);
2617: $sth = $dbh->prepare($request);
2618: $sth->execute();
2619: if ($dbh->err) {
1.138 matthew 2620: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2621: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2622: return undef;
2623: }
2624: my $dataset = $sth->fetchall_arrayref();
2625: return $dataset;
2626: }
2627:
2628: ################################################
2629: ################################################
2630:
2631: =pod
2632:
1.61 matthew 2633: =item &setup_table_names()
2634:
2635: input: course id
2636:
2637: output: none
2638:
2639: Cleans up the package variables for local caching.
2640:
2641: =cut
2642:
2643: ################################################
2644: ################################################
2645: sub setup_table_names {
2646: my ($courseid) = @_;
2647: if (! defined($courseid)) {
1.146 albertel 2648: $courseid = $env{'request.course.id'};
1.61 matthew 2649: }
2650: #
2651: if (! defined($current_course) || $current_course ne $courseid) {
2652: # Clear out variables
2653: $have_read_part_table = 0;
2654: undef(%ids_by_part);
2655: undef(%parts_by_id);
2656: $have_read_symb_table = 0;
2657: undef(%ids_by_symb);
2658: undef(%symbs_by_id);
2659: $have_read_student_table = 0;
2660: undef(%ids_by_student);
2661: undef(%students_by_id);
2662: #
2663: $current_course = $courseid;
2664: }
2665: #
2666: # Set up database names
2667: my $base_id = $courseid;
2668: $symb_table = $base_id.'_'.'symb';
2669: $part_table = $base_id.'_'.'part';
2670: $student_table = $base_id.'_'.'student';
2671: $performance_table = $base_id.'_'.'performance';
2672: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2673: $fulldump_part_table = $base_id.'_'.'partdata';
2674: $fulldump_response_table = $base_id.'_'.'responsedata';
2675: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1.127 matthew 2676: $weight_table = $base_id.'_'.'weight';
1.89 matthew 2677: #
2678: @Tables = (
2679: $symb_table,
2680: $part_table,
2681: $student_table,
2682: $performance_table,
2683: $parameters_table,
2684: $fulldump_part_table,
2685: $fulldump_response_table,
2686: $fulldump_timestamp_table,
1.127 matthew 2687: $weight_table,
1.89 matthew 2688: );
1.61 matthew 2689: return;
1.3 stredwic 2690: }
1.1 stredwic 2691:
1.35 matthew 2692: ################################################
2693: ################################################
2694:
2695: =pod
2696:
1.57 matthew 2697: =back
2698:
2699: =item End of Local Data Caching Subroutines
2700:
2701: =cut
2702:
2703: ################################################
2704: ################################################
2705:
1.89 matthew 2706: } # End scope of table identifiers
1.57 matthew 2707:
2708: ################################################
2709: ################################################
2710:
2711: =pod
2712:
2713: =head3 Classlist Subroutines
2714:
1.35 matthew 2715: =item &get_classlist();
2716:
2717: Retrieve the classist of a given class or of the current class. Student
2718: information is returned from the classlist.db file and, if needed,
2719: from the students environment.
2720:
1.150 albertel 2721: Optional arguments are $cdom, and $cnum (course domain,
2722: and course number, respectively). If either is ommitted the course
2723: will be taken from the current environment ($env{'request.course.id'},
1.146 albertel 2724: $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
1.35 matthew 2725:
2726: Returns a reference to a hash which contains:
2727: keys '$sname:$sdom'
1.136 raeburn 2728: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]
1.54 bowersj2 2729:
2730: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2731: as indices into the returned list to future-proof clients against
2732: changes in the list order.
1.35 matthew 2733:
2734: =cut
2735:
2736: ################################################
2737: ################################################
1.54 bowersj2 2738:
2739: sub CL_SDOM { return 0; }
2740: sub CL_SNAME { return 1; }
2741: sub CL_END { return 2; }
2742: sub CL_START { return 3; }
2743: sub CL_ID { return 4; }
2744: sub CL_SECTION { return 5; }
2745: sub CL_FULLNAME { return 6; }
2746: sub CL_STATUS { return 7; }
1.111 raeburn 2747: sub CL_TYPE { return 8; }
1.136 raeburn 2748: sub CL_LOCKEDTYPE { return 9; }
1.35 matthew 2749:
2750: sub get_classlist {
1.150 albertel 2751: my ($cdom,$cnum) = @_;
2752: my $cid = $cdom.'_'.$cnum;
2753: if (!defined($cdom) || !defined($cnum)) {
2754: $cid = $env{'request.course.id'};
2755: $cdom = $env{'course.'.$cid.'.domain'};
2756: $cnum = $env{'course.'.$cid.'.num'};
2757: }
1.57 matthew 2758: my $now = time;
1.35 matthew 2759: #
2760: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2761: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2762: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2763: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2764: return undef;
2765: }
1.35 matthew 2766: my ($sname,$sdom) = split(/:/,$student);
2767: my @Values = split(/:/,$info);
1.136 raeburn 2768: my ($end,$start,$id,$section,$fullname,$type,$lockedtype);
1.35 matthew 2769: if (@Values > 2) {
1.136 raeburn 2770: ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values;
1.35 matthew 2771: } else { # We have to get the data ourselves
2772: ($end,$start) = @Values;
1.37 matthew 2773: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2774: my %info=&Apache::lonnet::get('environment',
2775: ['firstname','middlename',
2776: 'lastname','generation','id'],
2777: $sdom, $sname);
2778: my ($tmp) = keys(%info);
2779: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2780: $fullname = 'not available';
2781: $id = 'not available';
1.38 matthew 2782: &Apache::lonnet::logthis('unable to retrieve environment '.
2783: 'for '.$sname.':'.$sdom);
1.35 matthew 2784: } else {
1.141 albertel 2785: $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname');
1.35 matthew 2786: $id = $info{'id'};
2787: }
1.36 matthew 2788: # Update the classlist with this students information
2789: if ($fullname ne 'not available') {
1.141 albertel 2790: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2791: my $reply=&Apache::lonnet::cput('classlist',
1.36 matthew 2792: {$student => $enrolldata},
2793: $cdom,$cnum);
2794: if ($reply !~ /^(ok|delayed)/) {
2795: &Apache::lonnet::logthis('Unable to update classlist for '.
2796: 'student '.$sname.':'.$sdom.
2797: ' error:'.$reply);
2798: }
2799: }
1.35 matthew 2800: }
2801: my $status='Expired';
2802: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2803: $status='Active';
2804: }
2805: $classlist{$student} =
1.136 raeburn 2806: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype];
1.35 matthew 2807: }
2808: if (wantarray()) {
2809: return (\%classlist,['domain','username','end','start','id',
1.136 raeburn 2810: 'section','fullname','status','type','lockedtype']);
1.35 matthew 2811: } else {
2812: return \%classlist;
2813: }
2814: }
2815:
1.1 stredwic 2816: # ----- END HELPER FUNCTIONS --------------------------------------------
2817:
2818: 1;
2819: __END__
1.36 matthew 2820:
1.35 matthew 2821:
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