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hamprint/apps/submissions/migrations/0003_backfill_verified_emails.py

40 lines
1.3 KiB
Python

"""Backfill `VerifiedEmail` from any historical submission that already had
`email_confirmed=True` (i.e. the user clicked the confirmation link before
the trust list existed). One-shot; safe to re-run thanks to
`update_or_create`."""
from django.db import migrations
def backfill_verified_emails(apps, schema_editor):
Submission = apps.get_model("submissions", "Submission")
VerifiedEmail = apps.get_model("submissions", "VerifiedEmail")
# `update_or_create` keeps the migration idempotent.
seen: set[str] = set()
qs = Submission.objects.filter(email_confirmed=True).exclude(
guest_email__isnull=True
).exclude(guest_email="").values_list("guest_email", flat=True)
for email in qs:
email = email.strip().lower()
if not email or email in seen:
continue
seen.add(email)
VerifiedEmail.objects.update_or_create(email=email)
def noop_reverse(apps, schema_editor):
"""We don't try to undo the backfill -- the trust list is a forward-only
derived artefact; rolling back the migration leaves the rows alone."""
class Migration(migrations.Migration):
dependencies = [
("submissions", "0002_verifiedemail"),
]
operations = [
migrations.RunPython(backfill_verified_emails, noop_reverse),
]