Some DBs have troubles to execute such a huge query as generated in this
test. We do not actually need to execute it. All we need is to make sure
that the parameter placeholders are enumerated correctly. So it is what
this new test does.
Static variables do not behave the way you might expect when accessing
them through the classes inheritance. When accessing a method via self::
or static:: operators, even though the method is inherited, its variable
scope is not. So the method unique_sql_parameter() was using the scope
of the child class and each child class had its own sequence of usp1,
usp2, usp3, ... placeholders. This led to "Incorrect number of query
parameters" error when multiuple condition classes were contributing to
a single SQL query.
All credit should go to Adam Olley who debugged and described the
essence of the problem in the tracker.
When filtering a user list, if there is an OR tree where one of the
conditions does not restrict user lists such as a date condition,
then the overall result should include all users (not be filtered).
This was not working correctly.
As part of the unit test modifications for this change, I added the get_json
function to the availability conditions that didn't have it. (This is a function
for use in unit tests.)
The previous API included a facility to filter a list of users
to include only those who are allowed to access an activity, i.e.
only people who belong to the required groups etc.
This change adds a new API function to return SQL that obtains
this list of users, so that it can be combined with other
queries.
Previously there was no way in PHP to create the JSON values used for
availability, except by manually hard-coding them (the main code to
do this normally is in JavaScript).
This makes unit tests hard to read, so I have implemented static
functions tree::get_root_json and tree::get_nested_json which allow
for easier-to-read unit tests.
Remove groupmembersonly usage in the core_availability API, and change
the update code (used in backup) so that it considers groupmembersonly
when restoring old backups.
This commit defines the new /availability root folder, with
/availability/classes, /availability/tests, and
/availability/condition where the condition plugins will live.
Condition plugin prefix is availability_, e.g. availability_date.
Rationale for this organisation:
1. I was originally going to put this in /lib/availability but
it has been pointed out that putting even more junk in lib
is probably bad.
2. 'availability' and 'condition' are the two names used in code
to refer to this system ($CFG->enableavailability).
3. The prefix has to be short enough to allow database tables
(although in practice I assume that condition plugins will not
normally contain database tables).
The new API includes a Boolean tree structure that controls the
availability of an item.
AMOS BEGIN
CPY [availabilityconditions,core_condition],[restrictaccess,core_availability]
CPY [enableavailability,core_condition],[enableavailability,core_availability]
CPY [configenableavailability,core_condition],[enableavailability_desc,core_availability]
AMOS END
