Ticket #13903: patch.diff

django/db/models/base.py

@@ -43 +43 @@
         base_meta = getattr(new_class, '_meta', None)
 
         if getattr(meta, 'app_label', None) is None:
-            # Figure out the app_label by looking one level up.
-            # For 'django.contrib.sites.models', this would be 'sites'.
+            # Figure out the app_label
+            # For 'django.contrib.sites.models', this would be 'sites';
+            # For 'something', this would ve 'something'.
             model_module = sys.modules[new_class.__module__]
-            kwargs = {"app_label": model_module.__name__.split('.')[-2]}
+            namespace = model_module.__name__.split('.')
+            if len(namespace) > 1:
+                app_label = namespace[-2]
+            else:
+                app_label = namespace[0]
+            kwargs = {"app_label": app_label}
         else:
             kwargs = {}
 

tests/modeltests/model_package/tests.py

@@ -77 +77 @@
 >>> Article._meta.get_field('publications').m2m_reverse_name()
 'publication_id'
 
+# Tests app_label if model is defined in strange places
+>>> import sys
+>>> old_name = sys.modules[__name__].__name__
+>>> sys.modules[__name__].__name__ = 'top_level'
+>>> class TopLevel(models.Model): pass
+>>> TopLevel._meta.app_label
+'top_level'
+
+>>> sys.modules[__name__].__name__ = old_name
+
 """}