move createcachetable to post migrate signal (#9944)

Use management command in post-migrate signal to create cache table instead of in Raw SQL in migrations
Co-authored-by: John Tordoff <>

osf/apps.py

@@ -2,7 +2,7 @@
 
 from django.apps import AppConfig as BaseAppConfig
 from django.db.models.signals import post_migrate
-from osf.migrations import update_permission_groups
+from osf.migrations import update_permission_groups, create_cache_table
 
 
 class AppConfig(BaseAppConfig):
@@ -16,3 +16,7 @@ def ready(self):
             update_permission_groups,
             dispatch_uid='osf.apps.update_permissions_groups'
         )
+        post_migrate.connect(
+            create_cache_table,
+            dispatch_uid='osf.apps.create_cache_table'
+        )

osf/migrations/0156_create_cache_table.py

@@ -1,23 +1,11 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 from django.db import migrations
-from django.conf import settings
 
 
 class Migration(migrations.Migration):
     dependencies = [
         ('osf', '0155_merge_20190115_1437'),
     ]
     operations = [
-        migrations.RunSQL([
-            """
-            CREATE TABLE "{}" (
-                "cache_key" varchar(255) NOT NULL PRIMARY KEY,
-                "value" text NOT NULL,
-                "expires" timestamp with time zone NOT NULL
-            );
-            """.format(settings.CACHES[settings.STORAGE_USAGE_CACHE_NAME]['LOCATION'])
-        ], [
-            """DROP TABLE "{}"; """.format(settings.CACHES[settings.STORAGE_USAGE_CACHE_NAME]['LOCATION'])
-        ])
     ]

osf/migrations/__init__.py

@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 import logging
 from django.db.utils import ProgrammingError
+from django.core.management import call_command
+from api.base import settings
 
 logger = logging.getLogger(__file__)
 
@@ -119,3 +121,8 @@ def update_permission_groups(sender, verbosity=0, **kwargs):
     if getattr(sender, 'label', None) == 'osf':
         update_admin_permissions(verbosity)
         update_provider_auth_groups(verbosity)
+
+
+def create_cache_table(sender, verbosity=0, **kwargs):
+    if getattr(sender, 'label', None) == 'osf':
+        call_command('createcachetable', tablename=settings.CACHES[settings.STORAGE_USAGE_CACHE_NAME]['LOCATION'])