Load teacher names in dialogue creation with large number of users and groups in a course

[sumaiyamannan]

Hi,

Improve the performance of the user selector on the create dialogue page when used in courses with large numbers of users in groups – This will resolve the issue experienced where Teacher names are not loading within the selector in large groups.

To replicate the issue have the below setup:

• Create a Moodle 4.1 instance has a large number of users and groups
• Create 25,000 users,
• Create 5 courses,
• Add the Dialogue activity to at least one course,
• Create 5 groups in each of the 5 courses,
• Enrol 5000 users with the Student role on to each of the 5 courses,
• Assign 1000 users to each group,
• Enrol 5 additional users with the Teacher role on to each of the 5 courses,
• Assign 1 Teacher to each of the 5 groups
• Remove mod/dialogue:receive capability from the 'student' role

Log in as a Student who is enrolled on the same course which has the Dialogue Activity added,

• Access the course and go to the Dialogue activity,
• Click on the 'Create' link,
• Locate the 'Open with' search field and click the search arrow.

Expected behaviour: The search should return the name of the Teacher who is in the same group as the logged on Student.
Actual behaviour: No results are returned.

Regards,
Sumaiya