Exception : Call to a member function summarise() on null

Exception : Call to a member function summarise() on null

Ulrike Albers -
Колькасьць адказаў: 8

Hello,

I should have posted an answer in this discussion, but it is closed.

We use Moodle 3.6; in a quiz, there is a problem with the statistics: we get the following error:

Exception : Call to a member function summarise() on null

The same error is displayed when one clicks on recalculate grades. It is possible that the teacher modified some question after a students' attempt (I wonder how, though, as Moodle usually prevents us from doing that). Is there a way to access the statistics?

Thank you in advance!


Сярэдняе рэйтынгаў: -
У адказ на Ulrike Albers

Re: Exception : Call to a member function summarise() on null

Tim Hunt -
Выява Core developers Выява Documentation writers Выява Particularly helpful Moodlers Выява Peer reviewers Выява Plugin developers
This looks like MDL-66095 (sorry, not fixed yet) although a temporary work-around was added in MDL-66115, so if you upgrade to the latest 3.6.x release, things should start working.

And, more generally, be very, very careful editing questions after students had attempted them.
Сярэдняе рэйтынгаў:Useful (2)
У адказ на Tim Hunt

Re: Exception : Call to a member function summarise() on null

heli g -
We are experiencing this issue on 3.5, but cannot identify which files were modified in the MDL-6611 temporary work-around.
Assistance would be greatly appreciated.
Сярэдняе рэйтынгаў: -
У адказ на heli g

Re: Exception : Call to a member function summarise() on null

Tim Hunt -
Выява Core developers Выява Documentation writers Выява Particularly helpful Moodlers Выява Peer reviewers Выява Plugin developers
That is the wrong issue number. The right issue number is in my post above.

And, the code change for that fix is https://github.com/moodle/moodle/commit/39260e3eadc71613320d80b99c3d4352b9994e48
Сярэдняе рэйтынгаў:Useful (1)
У адказ на Tim Hunt

Re: Exception : Call to a member function summarise() on null

heli g -
Thank you so much Tim - that fixed it. You really are amazing!
(Apologies for the typo in the post above, I was indeed looking at MDL-66115)
Сярэдняе рэйтынгаў: -
У адказ на heli g

Re: Exception : Call to a member function summarise() on null

heli g -
Just in case anyone else is as clueless as me, if you can't find a link to code updates in the tracker: Go to https://github.com/moodle/moodle and enter the issue number in the Search box. The link to the code change is under Commits.
It seems so obvious now, but not so much when I was panicking late last night... Thanks again for your prompt assistance Tim.
Сярэдняе рэйтынгаў: -
У адказ на heli g

Re: Exception : Call to a member function summarise() on null

heli g -
The issue was identified because forum posts were not being emailed. It has temporarily been resolved by disabling \core\task\legacy_plugin_cron_task - but what effect will this have on Quizzes or any other mods that may be using legacy cron?
Сярэдняе рэйтынгаў: -
У адказ на heli g

Re: Exception : Call to a member function summarise() on null

Tim Hunt -
Выява Core developers Выява Documentation writers Выява Particularly helpful Moodlers Выява Peer reviewers Выява Plugin developers
To be honest, I don't remember exactly what the situation was in Moodle 3.5.

There was a big push to get all the legacy cron converted to use the new scheduled task system (MDL-61164). Some of that was done for 3.5, but some of it was not finished until 3.7 (See the linked issues.)
Сярэдняе рэйтынгаў:Useful (1)