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79 lines
3.4 KiB
Python
79 lines
3.4 KiB
Python
from django.db import migrations
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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 fix_old_realm_reactivation_confirmations(
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apps: StateApps, schema_editor: BaseDatabaseSchemaEditor
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) -> None:
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"""
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Migration 0400_realmreactivationstatus changed REALM_REACTIVATION Confirmation
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to have a RealmReactivationStatus instance as .content_object. Now we need to migrate
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pre-existing REALM_REACTIVATION Confirmations to follow this format.
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The process is a bit fiddly because Confirmation.content_object is a GenericForeignKey,
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which can't be directly accessed in migration code, so changing it involves manually
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updating the .object_id and .content_type attributes underpinning it.
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For these old Confirmation we don't have a mechanism for tracking which have been used,
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so it's safest to just revoke them all. If any users need a realm reactivation link, it
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can just be re-generated.
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"""
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REALM_REACTIVATION = 8
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RealmReactivationStatus = apps.get_model("zerver", "RealmReactivationStatus")
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Realm = apps.get_model("zerver", "Realm")
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Confirmation = apps.get_model("confirmation", "Confirmation")
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ContentType = apps.get_model("contenttypes", "ContentType")
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if not Confirmation.objects.filter(type=REALM_REACTIVATION).exists():
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# No relevant Confirmations so nothing to do, and the database may actually
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# no be provisioned yet, which would make the code below break.
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return
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# .content_type of these old Confirmation will be changed to this.
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realm_reactivation_status_content_type, created = ContentType.objects.get_or_create(
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model="realmreactivationstatus", app_label="zerver"
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)
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for confirmation in Confirmation.objects.filter(type=REALM_REACTIVATION):
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if confirmation.content_type_id == realm_reactivation_status_content_type.id:
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# This Confirmation is already in the new format.
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continue
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assert confirmation.content_type.model == "realm"
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realm_object_id = confirmation.object_id
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# Sanity check that the realm exists.
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try:
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Realm.objects.get(id=realm_object_id)
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except Realm.DoesNotExist:
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print(
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f"Confirmation {confirmation.id} is tied to realm_id {realm_object_id} which doesn't exist. "
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"This is unexpected! Skipping migrating it."
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)
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continue
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# We create the object with STATUS_REVOKED.
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new_content_object = RealmReactivationStatus(realm_id=realm_object_id, status=2)
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new_content_object.save()
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# Now we can finally change the .content_object. This is done by setting
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# .content_type to the correct ContentType as mentioned above and the object_id
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# to the id of the RealmReactivationStatus instance that's supposed to be
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# the content_object. This works because .content_object is dynamically
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# derived by django from the .content_type and object_id values.
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confirmation.content_type_id = realm_reactivation_status_content_type
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confirmation.object_id = new_content_object.id
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confirmation.save()
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class Migration(migrations.Migration):
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dependencies = [
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("zerver", "0400_realmreactivationstatus"),
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]
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operations = [
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migrations.RunPython(fix_old_realm_reactivation_confirmations, elidable=True),
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]
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