Add a new auto-slug field that is concurrency resistent

settings.py

@@ -3,7 +3,7 @@ import dj_database_url
 DEBUG = True
 TEMPLATE_DEBUG = True
 
-SECRET_KEY = 'this is my secret key'
+SECRET_KEY = 'this is my secret key'  # NOQA
 
 TEST_RUNNER = 'django.test.runner.DiscoverRunner'
 
@@ -11,6 +11,8 @@ DATABASES = {
     'default': dj_database_url.config(default='postgres:///localized_fields')
 }
 
+DATABASES['default']['ENGINE'] = 'localized_fields.db_backend'
+
 LANGUAGE_CODE = 'en'
 LANGUAGES = (
     ('en', 'English'),