This changes the cache purge code to select IDs for deletion
first, rather than using a subquery in a DELETE, since this
risks causing a deadlock in MySQL.
If a quiz had a long job to calculate statstics running, this would
cause pages that may also attempt a recalculation (the statistics report
page or question bank) to load very slowly, and possibly result in a
database deadlock.
This change will firstly prevent the question bank page performing
analysis calculations at all, since these are not required for this
page, which will speed up loading and prevent deadlocks on this page.
Secondly, this adds a lock to the recalcuation process so that it cannot
run twice concurrently. This will present the user with a message to
indicate that it is waiting for a running calculation until it is
complete, and eventually it will timeout with a message and debugging.
We were experiencing problems caused by old stats analysis in our
database, computed when there was a bug, causing fatal errors
when they were displayed. Therefore, this code needs to be robust to that.
It turns out that there are plugins which don't (currently)
clean up their question attempts when a context is deleted.
Therefore, we need to make Moodle core robust to that.
Previously, a set of calculated quiz statistics would only 'last' for
15 minutes. Then they would be considered invalid and not used.
Now, computed statistics are kept indefinitely. Instead, when a new
batch of values are computed for a particular set of settings, older numbers
for the same settings are deleted first. Therefore,
question_stats_cleanup_task is no more.
There is a new method on the column class, for the column to declare any
statistics it requires. The question then efficiently loads all those
statistics in one go, and makes them available as the columns are
rendererd, or do any subsequent processing.
In PHP 8.2 and later, setting a value to an undeclared class property is
deprecated and emits a deprecation notice.
So we need to add missing class properties that still need to be declared.
Co-authored-by: Tim Hunt <t.j.Hunt@open.ac.uk>
PHP before version 8.1 automatically converted to int if the function
parameter (or array key) is expected to be int. PHP 8.1 shows notice in
this case
This commit implements the bulk action api to allow multiple bulk
actions from the qbank plugins instead of one. Any qbank plugin
wants to implement bulk action can now define an array of bulk
actions as a plugin feature.
This implementation will introduce a feature "columnsortorder"
which will add the column sort order feature in an external page.
Having this feature will give users the flexibility of sorting plugin
columns in the question bank view.
The tertiary navigation has been added to the question bank.
- Url selector has been added for the pages:
Questions, Categories, Import and Export
- A separate page to "Add category" has been added.
The "Add category" is available as a tertiary nav button.
- Updated the tests for the changes made.
This commit is mostly Sujith's work, with further changes by
Tim Hunt <T.J.Hunt@open.ac.uk> so we share the blame/credit.
AMOS BEGIN
CPY [questioncats,mod_quiz],[questioncategories,core_question]
AMOS END
This commit implements the status change pop up for a question
in the base view. This feature update will allow the change of
status of a question without creating a new version.
This commit also implements the status as a char rather than
an int value.
This commit implements versioning and associated features
in the previewquestion plugin. There have been some major
changes in the random question and version selection for
questions. This commit made those changes as well as added
some more features in the preview for version selection
and adds more behat coverage.
Mark Johnson