fix: add migration to clean class data

[evemartin]

This change is 

[faucomte97]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @evemartin)

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cfl_common/common/migrations/0053_clean_class_data.py line 4 at r2 (raw file):

from django.db import migrations, models

def clean_dirty_data(apps: Apps, *args):

Please give this a more descriptive name (the file name itself might be good enough)

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cfl_common/common/migrations/0053_clean_class_data.py line 8 at r2 (raw file):

    Class.objects.filter(
        creation_time__year=2015

Let's actually make a migration that clears the creation time for any class that has a creation time earlier than the day we started tracking it (you should be able to check when the migration was made that adds the creation_time field, that'll be the day we need to filter before).

I know it doesn't look like we have any classes other than those 16 in 2015 but let's still do that just in case.

[faucomte97]

Reviewed 1 of 1 files at r3, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @evemartin)

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cfl_common/common/migrations/0053_clean_class_data.py line 8 at r3 (raw file):

    Class.objects.filter(
        creation_time__date__gt = datetime.date(2021, 10, 15)

Needs to be lt not gt 🙃

[evemartin]

I have now successfully tested this on Dev!

[faucomte97]

Reviewed 1 of 1 files at r5, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @evemartin)