Development:Cohorts
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Note: This article is a work in progress. Please use the page comments or an appropriate moodle.org forum for any recommendations/suggestions for improvement.
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Goals
Site-wide groups (aka cohorts) is one of the most requested missing features.
- Simplify manual enrolments - instead of enrolling students one by one, it would be possible to enrol a cohort with single click.
- Cohort enrolment plugin - new enrolment plugin synchronising users in cohort with enrolments in a course (including role assignment and group membership)
- Synchronisation with external systems - some external systems do not know the actual courses, they only contain some user groups, at present we do not have a simple way to reuse these groups in Moodle.
- Partially replace meta courses - metacourse is a confusing concept for many people, there are several unsolved problems and performance issues.
- Partially replace category enrolments - category enrolments have major design issues and are not compatible with proposed enrolment changes.
Use cases
DB tables
Table cohort definition of site-wide groups (aka cohorts)
| Field | Type | Default | Description |
|---|---|---|---|
| id | int(10) | auto-incrementing | |
| contextid | int(10) | foreign key, references context.id | |
| name | char(255) | name of cohort | |
| description | text | longer description | |
| timecreated | int(10) | timestamp, creation date | |
| timemodified | int(10) | timestamp, last modification |
Context specified can be system or course category level, defining of cohort a course context would not make much sense.
Table cohort_members stores cohort members
| Field | Type | Default | Description |
|---|---|---|---|
| id | int(10) | auto-incrementing | |
| cohortid | int(10) | foreign key, references cohort.id | |
| userid | int(10) | foreign key, references user.id | |
| timeadded | int(10) | timestamp, when added |
New capabilities
- moodle/cohort:assign (add/delete members)
- moodle/cohort:manage (add/delete/move cohorts)
- moodle/cohort:view (view membership and use cohort elsewhere)
