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115 lines
4.6 KiB
Python
115 lines
4.6 KiB
Python
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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from django.db.models import Exists, Max, OuterRef, Subquery
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def backfill_message_realm(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor) -> None:
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RECIPIENT_PERSONAL = 1
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RECIPIENT_STREAM = 2
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RECIPIENT_HUDDLE = 3
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Message = apps.get_model("zerver", "Message")
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ArchivedMessage = apps.get_model("zerver", "ArchivedMessage")
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Recipient = apps.get_model("zerver", "Recipient")
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Subscription = apps.get_model("zerver", "Subscription")
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Stream = apps.get_model("zerver", "Stream")
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UserProfile = apps.get_model("zerver", "UserProfile")
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Huddle = apps.get_model("zerver", "Huddle")
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print()
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print("Deleting dangling Recipient objects and their messages, which are inaccessible.")
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Recipient.objects.annotate(
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has_object=Exists(UserProfile.objects.filter(id=OuterRef("type_id")))
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).filter(type=RECIPIENT_PERSONAL, has_object=False).delete()
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Recipient.objects.annotate(
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has_object=Exists(Stream.objects.filter(id=OuterRef("type_id")))
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).filter(type=RECIPIENT_STREAM, has_object=False).delete()
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Recipient.objects.annotate(
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has_object=Exists(Huddle.objects.filter(id=OuterRef("type_id")))
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).filter(type=RECIPIENT_HUDDLE, has_object=False).delete()
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BATCH_SIZE = 10000
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for message_model in [Message, ArchivedMessage]:
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lower_bound = 1
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max_id = message_model.objects.aggregate(Max("id"))["id__max"]
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if max_id is None:
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continue
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while lower_bound <= max_id:
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# Django's range() function is inclusive on both ends.
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upper_bound = lower_bound + BATCH_SIZE - 1
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print(f"Processing batch {lower_bound} to {upper_bound} for {message_model.__name__}")
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with transaction.atomic():
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message_model.objects.filter(
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id__range=(lower_bound, upper_bound),
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recipient__type=RECIPIENT_STREAM,
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).update(
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realm=Subquery(
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Recipient.objects.filter(pk=OuterRef("recipient")).values("stream__realm")
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)
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)
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# Private message to cross-realm bots are a special case, and the .realm
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# of the message should be realm of the sender.
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message_model.objects.filter(
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id__range=(lower_bound, upper_bound),
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recipient__type=RECIPIENT_PERSONAL,
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recipient__userprofile__delivery_email__in=settings.CROSS_REALM_BOT_EMAILS,
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).update(
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realm=Subquery(
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UserProfile.objects.filter(pk=OuterRef("sender")).values("realm")
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)
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)
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message_model.objects.filter(
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id__range=(lower_bound, upper_bound),
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recipient__type=RECIPIENT_PERSONAL,
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).exclude(
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recipient__userprofile__delivery_email__in=settings.CROSS_REALM_BOT_EMAILS
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).update(
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realm=Subquery(
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Recipient.objects.filter(pk=OuterRef("recipient")).values(
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"userprofile__realm"
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)
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)
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)
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# Huddles don't have a direct way of finding their
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# realm, so we have to go through the Subscription
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# table. For huddles including a cross-realm bot, all
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# of the other users will be in the same realm, so
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# just find any of those users to get the message's realm.
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message_model.objects.filter(
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id__range=(lower_bound, upper_bound),
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recipient__type=RECIPIENT_HUDDLE,
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).update(
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realm=Subquery(
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Subscription.objects.filter(recipient=OuterRef("recipient"))
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.exclude(user_profile__delivery_email__in=settings.CROSS_REALM_BOT_EMAILS)
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.values("user_profile__realm")[:1]
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)
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)
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lower_bound += BATCH_SIZE
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class Migration(migrations.Migration):
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atomic = False
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dependencies = [
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("zerver", "0418_archivedmessage_realm_message_realm"),
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]
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operations = [
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migrations.RunPython(
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backfill_message_realm,
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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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