Backfill LMSCourseMembership

[marcospri]

For:

• New LMSUser and LMSCourse tables #6575

We never stored course level membership information with roles. We only did that at the assignment level.

Use the assignment level information to fill the parent course membership information.

Testing

• Truncate the target and source tables:

truncate assignment_membership, lms_course_membership cascade;

• Launch a bunch of assignments

https://hypothesis.instructure.com/courses/125/assignments/1833
https://hypothesis.instructure.com/courses/125/assignments/874
https://hypothesis.instructure.com/courses/319/assignments/3308

• Check the state of the table now:

 select lms_course_id, lms_user_id, lti_role_id from  lms_course_membership;
 lms_course_id | lms_user_id | lti_role_id
---------------+-------------+-------------
           104 |         982 |          17
           104 |         982 |          18
           104 |         982 |          20
           104 |         982 |          19
           105 |         982 |          21
(5 rows)

• Truncate just the target again:

truncate lms_course_membership cascade;

• Apply the migration

tox -e dev --run-command 'alembic upgrade head'

• Check the data again now:

select lms_course_id, lms_user_id, lti_role_id from  lms_course_membership;
 lms_course_id | lms_user_id | lti_role_id
---------------+-------------+-------------
           104 |         982 |          17
           104 |         982 |          19
           104 |         982 |          20
           104 |         982 |          18
           105 |         982 |          21
(5 rows)

which matches the data from before the last truncate.