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Fixed #22922: Better error message for InvalidBasesError.

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1 parent 008bff9 commit b02abd688a60e2dedf607e34d2cc97aca8d1c2b5 @andrewgodwin andrewgodwin committed Jul 9, 2014
Showing with 1 addition and 1 deletion.
  1. +1 −1 django/db/migrations/
2 django/db/migrations/
@@ -68,7 +68,7 @@ def render(self, include_real=None, ignore_swappable=False, skip_cache=False):
except InvalidBasesError:
if len(new_unrendered_models) == len(unrendered_models):
- raise InvalidBasesError("Cannot resolve bases for %r" % new_unrendered_models)
+ raise InvalidBasesError("Cannot resolve bases for %r\nThis can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)\n in an app with no migrations; see for more" % new_unrendered_models)
unrendered_models = new_unrendered_models
# make sure apps has no dangling references
if self.apps._pending_lookups:

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