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71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
# Generated by Django 3.1.7 on 2021-03-31 20:47
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import time
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from datetime import timedelta
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from django.conf import settings
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from django.db import migrations, transaction
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from django.db.backends.base.schema import BaseDatabaseSchemaEditor
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from django.db.migrations.state import StateApps
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def set_expiry_date_for_existing_confirmations(
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apps: StateApps, schema_editor: BaseDatabaseSchemaEditor
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) -> None:
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Confirmation = apps.get_model("confirmation", "Confirmation")
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if not Confirmation.objects.exists():
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return
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# The values at the time of this migration
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INVITATION = 2
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UNSUBSCRIBE = 4
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MULTIUSE_INVITE = 6
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@transaction.atomic
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def backfill_confirmations_between(lower_bound: int, upper_bound: int) -> None:
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confirmations = Confirmation.objects.filter(id__gte=lower_bound, id__lte=upper_bound)
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for confirmation in confirmations:
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if confirmation.type in (INVITATION, MULTIUSE_INVITE):
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confirmation.expiry_date = confirmation.date_sent + timedelta(
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days=settings.INVITATION_LINK_VALIDITY_DAYS
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)
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elif confirmation.type == UNSUBSCRIBE:
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# Unsubscribe links never expire, which we apparently implement as in 1M days.
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confirmation.expiry_date = confirmation.date_sent + timedelta(days=1000000)
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else:
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confirmation.expiry_date = confirmation.date_sent + timedelta(
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days=settings.CONFIRMATION_LINK_DEFAULT_VALIDITY_DAYS
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)
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Confirmation.objects.bulk_update(confirmations, ["expiry_date"])
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# Because the ranges in this code are inclusive, subtracting 1 offers round numbers.
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BATCH_SIZE = 1000 - 1
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first_id = Confirmation.objects.earliest("id").id
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last_id = Confirmation.objects.latest("id").id
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id_range_lower_bound = first_id
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id_range_upper_bound = first_id + BATCH_SIZE
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while id_range_lower_bound <= last_id:
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print(f"Processed {id_range_lower_bound} / {last_id}")
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backfill_confirmations_between(id_range_lower_bound, id_range_upper_bound)
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id_range_lower_bound = id_range_upper_bound + 1
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id_range_upper_bound = id_range_lower_bound + BATCH_SIZE
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time.sleep(0.1)
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class Migration(migrations.Migration):
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atomic = False
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dependencies = [
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("confirmation", "0008_confirmation_expiry_date"),
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]
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operations = [
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migrations.RunPython(
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set_expiry_date_for_existing_confirmations,
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reverse_code=migrations.RunPython.noop,
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elidable=True,
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),
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]
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