Initial Waitlisting Feature Dev

[gabrielhan23]

Finished initial backend feature for waitlisting.

• waitlist model (using timestamps)
• add and drop api for waitlist
• auto add from waitlist after students drop
• light testing with api and admin tools

Not implemented yet:

• coord capabilities
• what to do when student being added from waitlist fails
• waitlist ordering

[smartspot2]

Haven't taken too close of a look at the implementation yet, but just wanted to point out some things I noticed; left some comments about them.

In addition, try to at least get the pytests and the pre-commit check to pass (I don't believe that they'll automatically run on this PR since it's not targeting master, so you may need to manually re-run tests on the PR).

[faithdennis]

Some tests seem to be failing according to the automated tests. Could changing section view have broken other tests? If not, I'm not sure if these automated tests are valid.

[smartspot2]

Some tests seem to be failing according to the automated tests. Could changing section view have broken other tests? If not, I'm not sure if these automated tests are valid.

pre-commit is failing due to the anonymized_data.json file being incorrectly committed (along with some python style issues), and pytest/cypress tests are failing due to the following error:

Traceback (most recent call last):

  File "/opt/hostedtoolcache/Python/3.9.20/x64/lib/python3.9/site-packages/django/db/backends/utils.py", line 89, in _execute

return self.cursor.execute(sql, params)
psycopg2.errors.NotNullViolation: null value in column "max_waitlist" of relation "scheduler_course" violates not-null constraint

DETAIL:  Failing row contains (1, CS61A, 2024-12-01, 2024-10-02 16:03:44.763658+00, 2024-11-16 17:03:44.763658+00, 2, Structure and Interpretation of Computer Programs, 2024-10-17, f, null, null).

Seems like you need to make sure that max_waitlist is set for all Course models in tests, since it's set as non-null.