Try checking if table already exists and no-op if it does for addons

documentcloud/users/migrations/0013_user_active_addons.py

@@ -1,21 +1,36 @@
 from django.db import migrations, models
 
-class Migration(migrations.Migration):
 
+class Migration(migrations.Migration):
     dependencies = [
         ("users", "0001_initial_squashed_0010_user_bio_alter_user_email_alter_user_username"),
         ("users", "0007_auto_20211102_1707"),
     ]
-
     operations = [
-        migrations.AddField(
-            model_name="user",
-            name="active_addons",
-            field=models.ManyToManyField(
-                help_text="Add-Ons shown for this user",
-                related_name="users",
-                to="addons.addon",
-                verbose_name="active add-ons",
-            ),
-        ),
+        migrations.SeparateDatabaseAndState(
+            state_operations=[
+                migrations.AddField(
+                    model_name="user",
+                    name="active_addons",
+                    field=models.ManyToManyField(
+                        help_text="Add-Ons shown for this user",
+                        related_name="users",
+                        to="addons.addon",
+                        verbose_name="active add-ons",
+                    ),
+                ),
+            ],
+            database_operations=[
+                migrations.RunSQL(
+                    sql="""
+                        CREATE TABLE IF NOT EXISTS users_user_active_addons (
+                            id serial NOT NULL PRIMARY KEY,
+                            user_id integer NOT NULL REFERENCES users_user(id) DEFERRABLE INITIALLY DEFERRED,
+                            addon_id bigint NOT NULL REFERENCES addons_addon(id) DEFERRABLE INITIALLY DEFERRED
+                        )
+                    """,
+                    reverse_sql="DROP TABLE IF EXISTS users_user_active_addons",
+                ),
+            ],
+        )
     ]