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This field is primarily intended to support avoiding displaying the "more topics" feature in new organizations and streams, where we might know that all messages in the stream are already available in the browser. Based on original work by Roman Godov, and significantly modified by tabbott. The second migration involved here could be expensive on Zulip Cloud, but is unlikely to be an issue on other servers.
32 lines
1.1 KiB
Python
32 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
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# Generated by Django 1.11.18 on 2019-02-25 12:42
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from __future__ import unicode_literals
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from django.db import migrations
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from django.db.backends.postgresql_psycopg2.schema import DatabaseSchemaEditor
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from django.db.migrations.state import StateApps
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def backfill_first_message_id(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
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Stream = apps.get_model('zerver', 'Stream')
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Message = apps.get_model('zerver', 'Message')
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for stream in Stream.objects.all():
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first_message = Message.objects.filter(
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recipient__type_id=stream.id,
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recipient__type=2).first()
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if first_message is None:
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# No need to change anything if the outcome is the default of None
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continue
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stream.first_message_id = first_message.id
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stream.save()
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class Migration(migrations.Migration):
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dependencies = [
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('zerver', '0209_stream_first_message_id'),
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]
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operations = [
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migrations.RunPython(backfill_first_message_id,
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reverse_code=migrations.RunPython.noop),
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]
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