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Bug
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Resolution: Fixed
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Critical
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1.9.10, 2.1.3, 2.2, STABLE backlog
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Apache 2.2.10, PHP 5.2.14, SLES 11 SP1, Oracle 11g
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Oracle
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MOODLE_19_STABLE, MOODLE_21_STABLE, MOODLE_22_STABLE
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MOODLE_23_STABLE
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MDL-26275_large_grader -
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We have a course with 47 students and 18 assignments/tests/quizzes. When we try to update the grades for the students in the gradebook, only part of the grades are saved. For the ones that don't save, we have to click on the little "hand" icon to manually "edit" the grade, and it will save then.
Using Firebug, I traced this down to a problem with how Moodle saves the changes to the gradebook, basically by creating one giant form POST containing all the fields and values, like:
id=2161&sesskey=F9J3pymnk6&report=grader&oldgrade_13214_4098=8.00&grade_13214_4098=8.00&oldgrade_13214_4099=&grade_13214_4099=&oldgrade_13214_4100=&grade_13214_4100=&oldgrade_13214_4101=.....
In our case, the form post for this gradebook ended up being 33184 bytes, which appears to be too large for something (Apache/Firefox/IE/PHP/linux/etc.) to handle.
To test things out, I made a php page in our Moodle instance (moodle/test/index.php) containing the following code to output all the information it received:
<?php
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if ($_REQUEST) {
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echo "<table border=1> \n";
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echo " <tr> \n";
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echo " <td><b>result_name </b></td> \n ";
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echo " <td><b>result_val </b></td> \n ";
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echo " </tr> \n";
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while (list($result_nme, $result_val) = each($_REQUEST)) {
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echo " <tr> \n";
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echo " <td> $result_nme </td> \n";
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echo " <td> $result_val </td> \n";
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echo " </tr> \n";
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}
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echo "</table> \n";
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}
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?>
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I then created a copy of the index.php page inside moodle/grade/report/grader/ and pointed that copy of the page to post its data to the test page I created.
I've attached a couple of files to help illustrate this:
outputPostAttribs.pdf contains the browser output of that test recipient page I made.
FirebugLocationWithRequestHeaders.txt is an output of the Form POST data that Firebug reported
The two grades I entered (at the bottom of the list) were the grades for students with Moodle ID's 32738 and 7348 (I gave them a grade of 2.) When you parse through the Firebug file, you can see the following values:
grade_32738_4098=2
grade_7348_4098=2
However, those fields aren't in the list that Apache received.
The bad thing is that I'm not aware of an easy workaround for this issue short of a complete overhaul of the Moodle gradebook.
- Discovered while testing
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- Closed
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- has a non-specific relationship to
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- Closed
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- has been marked as being related by
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- Closed
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- Closed
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- Closed
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MDL-35074 Ease limit on number of students per page in Grader Report imposed by max_input_vars
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- Closed
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- is duplicated by
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- Closed
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- Closed
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- Closed
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- Closed
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- Closed
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- Closed
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- will be (partly) resolved by
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- Closed
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