Migrations to add CampaignEvent.fire_uuid correctly

temba/campaigns/migrations/0067_campaignevent_fire_uuid_campaignevent_status.py

@@ -1,9 +1,9 @@
 # Generated by Django 5.1.4 on 2025-02-28 15:24
 
-import uuid
-
 from django.db import migrations, models
 
+import temba.utils.uuid
+
 
 class Migration(migrations.Migration):
 
@@ -15,7 +15,12 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name="campaignevent",
             name="fire_uuid",
-            field=models.UUIDField(db_index=True, default=uuid.uuid4),
+            field=models.UUIDField(null=True),
+        ),
+        migrations.AlterField(
+            model_name="campaignevent",
+            name="fire_uuid",
+            field=models.UUIDField(default=temba.utils.uuid.uuid4, null=True),
         ),
         migrations.AddField(
             model_name="campaignevent",

temba/campaigns/migrations/0068_backfill_event_fire_uuid.py

@@ -0,0 +1,24 @@
+# Generated by Django 5.1.4 on 2025-02-28 20:53
+
+from django.db import migrations
+
+from temba.utils.uuid import uuid4
+
+
+def backfill_event_fire_uuid(apps, schema_editor):  # pragma: no cover
+    CampaignEvent = apps.get_model("campaigns", "CampaignEvent")
+
+    for event in CampaignEvent.objects.filter(fire_uuid=None).only("id"):
+        event.fire_uuid = uuid4()
+        event.save(update_fields=("fire_uuid",))
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("campaigns", "0067_campaignevent_fire_uuid_campaignevent_status"),
+    ]
+
+    operations = [
+        migrations.RunPython(backfill_event_fire_uuid, migrations.RunPython.noop),
+    ]

temba/campaigns/migrations/0069_alter_campaignevent_fire_uuid.py

@@ -0,0 +1,20 @@
+# Generated by Django 5.1.4 on 2025-02-28 20:55
+
+from django.db import migrations, models
+
+import temba.utils.uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("campaigns", "0068_backfill_event_fire_uuid"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="campaignevent",
+            name="fire_uuid",
+            field=models.UUIDField(default=temba.utils.uuid.uuid4),
+        ),
+    ]

temba/campaigns/models.py

@@ -1,5 +1,4 @@
 from datetime import datetime, timezone as tzone
-from uuid import uuid4
 
 from django_redis import get_redis_connection
 from smartmin.models import SmartModel
@@ -15,6 +14,7 @@
 from temba.orgs.models import Org
 from temba.utils import json, on_transaction_commit
 from temba.utils.models import TembaModel, TembaUUIDMixin, TranslatableField
+from temba.utils.uuid import uuid4
 
 
 class Campaign(TembaModel):
@@ -283,7 +283,7 @@ class CampaignEvent(TembaUUIDMixin, SmartModel):
 
     # TODO switch contact fires to reference event by this instead of it's ID/UUID so we can invalidate fires without
     # recreating events
-    fire_uuid = models.UUIDField(default=uuid4, db_index=True)
+    fire_uuid = models.UUIDField(default=uuid4)
 
     # the contact specific date value this is event is based on
     relative_to = models.ForeignKey(ContactField, on_delete=models.PROTECT, related_name="campaign_events")