add method to obtain the migration state of Tower

awx/main/utils/db.py

@@ -0,0 +1,22 @@
+# Copyright (c) 2017 Ansible by Red Hat
+# All Rights Reserved.
+
+# Django database
+from django.db.migrations.loader import MigrationLoader
+from django.db import connection
+
+# Python
+import re
+
+
+def get_tower_migration_version():
+    loader = MigrationLoader(connection, ignore_no_migrations=True)
+    v = '000'
+    for app_name, migration_name in loader.applied_migrations:
+        if app_name == 'main':
+            version_captures = re.findall('^[0-9]{4}_v([0-9]{3})_', migration_name)
+            if len(version_captures) == 1:
+                migration_version = version_captures[0]
+                if migration_version > v:
+                    v = migration_version
+    return v