Details
Description
The Quiz Results Statistics page is broken if there is an attempt that uses Drag and Drop Onto Image question.
Environment:
Moodle: 2021052500.14 | 4.0dev (Build: 20200918)
Database: mysql-server-5.7.31-0 amd64
Steps:
1. Create a course and enrol a student.
2. Turn editing on.
3. Add a Quiz activity.
4. Edit the quiz and add a question:
- Question type: Drag and drop onto image
- Name: My D&D onto image question
- Question text: The engineer is preparing to draw the plan. What are the steps (in order) that needs to be completed?
- Upload a background image: Any image type.
- Shuffle drag items each time question is attempted: Ticked
- Draggable item 1, type: Draggable text, text: Gather the necessary materials
- Draggable item 2, type: Draggable text, text: Get previous sketches
- Multiple tries, Penalty for each incorrect try: 100%
5. As a student log in and attempt the quiz.
6. Do not answer the question, just click Finish attempt... and click Submit all and finish.
7. As teacher/admin go to the Quiz activity. Click Results / Statistics.
OUTPUT:
Warning: Division by zero in /var/www/html/vanilla/question/type/ddimageortext/questionbase.php on line 152 |
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Warning: Division by zero in /var/www/html/vanilla/question/type/ddimageortext/questionbase.php on line 152 |
Error writing to database
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More information about this error |
Debug info: Unknown column 'NAN' in 'field list' |
INSERT INTO mdl_question_statistics (hashcode,timemodified,questionid,slot,subquestion,s,effectiveweight,negcovar,discriminationindex,discriminativeefficiency,sd,facility,subquestions,maxmark,positions,randomguessscore,variant) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
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[array (
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0 => '1afcbec028f7ca4b759200c2b2aa39303f30bdba', |
1 => 1600822611, |
2 => '1', |
3 => 1, |
4 => 0, |
5 => 2, |
6 => NULL, |
7 => 0, |
8 => NULL, |
9 => NULL, |
10 => 0.0, |
11 => 0.0, |
12 => '', |
13 => '1.0000000', |
14 => 1, |
15 => NAN, |
16 => NULL, |
)]
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Error code: dmlwriteexception
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Stack trace:
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line 489 of /lib/dml/moodle_database.php: dml_write_exception thrown |
line 1357 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end() |
line 1403 of /lib/dml/mysqli_native_moodle_database.php: call to mysqli_native_moodle_database->insert_record_raw() |
line 231 of /question/classes/statistics/questions/calculated.php: call to mysqli_native_moodle_database->insert_record() |
line 259 of /question/classes/statistics/questions/all_calculated_for_qubaid_condition.php: call to core_question\statistics\questions\calculated->cache() |
line 258 of /question/classes/statistics/questions/calculator.php: call to core_question\statistics\questions\all_calculated_for_qubaid_condition->cache() |
line 645 of /mod/quiz/report/statistics/report.php: call to core_question\statistics\questions\calculator->calculate() |
line 153 of /mod/quiz/report/statistics/report.php: call to quiz_statistics_report->get_all_stats_and_analysis() |
line 97 of /mod/quiz/report.php: call to quiz_statistics_report->display() |
Attachments
Issue Links
- duplicates
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MDL-76298 Drag drop questions don't validate that drop zones have been defined (causing division by zero errors in the statistics)
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- Closed
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- has a non-specific relationship to
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- Open
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- links to