snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

zerver/migrations/0617_remove_prefix_from_archived_streams.py

@@ -0,0 +1,58 @@
+import hashlib
+
+from django.db import migrations
+from django.db.backends.base.schema import BaseDatabaseSchemaEditor
+from django.db.migrations.state import StateApps
+
+
+def remove_prefix_from_archived_streams(
+    apps: StateApps, schema_editor: BaseDatabaseSchemaEditor
+) -> None:
+    Stream = apps.get_model("zerver", "Stream")
+    archived_streams = Stream.objects.filter(deactivated=True)
+
+    for archived_stream in archived_streams:
+        old_prefix = "!DEACTIVATED:"
+        streamID = str(archived_stream.id)
+        stream_id_hash_object = hashlib.sha512(streamID.encode())
+        hashed_stream_id = stream_id_hash_object.hexdigest()[0:7]
+        prefix = hashed_stream_id + old_prefix
+        prefix_length = len(prefix)
+        old_name = archived_stream.name
+        new_name = old_name
+        if old_name.startswith(prefix):
+            new_name = old_name[prefix_length:]
+
+        # Check for archived streams before commit 1b6f68b.
+        elif old_prefix in old_name:
+            prefix_end_index = old_name.find(old_prefix) + len(old_prefix)
+            new_name = old_name[prefix_end_index:]
+
+        else:
+            continue
+
+        # Check if there's an active stream or another archived stream with the new name
+        if not Stream.objects.filter(
+            realm_id=archived_stream.realm_id, name__iexact=new_name
+        ).exists():
+            archived_stream.name = new_name
+            archived_stream.save(update_fields=["name"])
+
+
+class Migration(migrations.Migration):
+    atomic = False
+
+    dependencies = [
+        (
+            "zerver",
+            "0616_userprofile_can_change_user_emails",
+        ),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            remove_prefix_from_archived_streams,
+            reverse_code=migrations.RunPython.noop,
+            elidable=True,
+        ),
+    ]