mirror of https://github.com/zulip/zulip.git
47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
from django.db import migrations, models
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from django.db.backends.postgresql.schema import BaseDatabaseSchemaEditor
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from django.db.migrations.state import StateApps
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from django.db.models import F
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def copy_stream_policy_field(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor) -> None:
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Realm = apps.get_model("zerver", "Realm")
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Realm.objects.all().update(create_public_stream_policy=F("create_stream_policy"))
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Realm.objects.all().update(create_private_stream_policy=F("create_stream_policy"))
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# When reversing the migration, we have to pick one of the new fields
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# to store in the original field name. This does destroy information,
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# but in most cases downgrades that would reverse migrations happen
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# before any real usage, so it's very likely that both values are
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# identical.
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def reverse_code(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor) -> None:
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Realm = apps.get_model("zerver", "Realm")
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Realm.objects.all().update(create_stream_policy=F("create_public_stream_policy"))
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class Migration(migrations.Migration):
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atomic = False
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dependencies = [
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("zerver", "0357_remove_realm_allow_message_deleting"),
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]
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operations = [
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migrations.AddField(
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model_name="realm",
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name="create_private_stream_policy",
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field=models.PositiveSmallIntegerField(default=1),
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),
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migrations.AddField(
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model_name="realm",
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name="create_public_stream_policy",
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field=models.PositiveSmallIntegerField(default=1),
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),
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migrations.RunPython(copy_stream_policy_field, reverse_code=reverse_code, elidable=True),
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migrations.RemoveField(
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model_name="realm",
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name="create_stream_policy",
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),
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]
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