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Ignore through being None on some special cases of fields.

This commit is contained in:
Andrew Godwin 2014-06-16 14:58:35 -07:00
parent 4529af9ecf
commit fa9a26745f
1 changed files with 1 additions and 1 deletions
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2
django/db/migrations/autodetector.py
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@ -156,7 +156,7 @@ class MigrationAutodetector(object):
old_model_state = self.from_state.models[app_label, old_model_name]
for field_name, field in old_model_state.fields:
old_field = self.old_apps.get_model(app_label, old_model_name)._meta.get_field_by_name(field_name)[0]
if hasattr(old_field, "rel") and hasattr(old_field.rel, "through") and not old_field.rel.through._meta.auto_created:
if hasattr(old_field, "rel") and getattr(old_field.rel, "through", None) and not old_field.rel.through._meta.auto_created:
through_key = (
old_field.rel.through._meta.app_label,
old_field.rel.through._meta.object_name.lower(),