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[1.7.x] Fixed #22847: Optimizer wasn't expecting unresolved FKs

This commit is contained in:
Andrew Godwin 2014-06-16 10:28:31 -07:00
parent d9a7663b11
commit 02860e779c
1 changed files with 7 additions and 4 deletions
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11
django/db/migrations/optimizer.py
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@ -1,6 +1,7 @@
from __future__ import unicode_literals
from django.db import migrations
from django.utils import six
class MigrationOptimizer(object):
@ -205,10 +206,12 @@ class MigrationOptimizer(object):
# Don't allow optimisations of FKs through models they reference
if hasattr(other.field, "rel") and other.field.rel:
for between in in_between:
if between.references_model(
other.field.rel.to._meta.object_name,
other.field.rel.to._meta.app_label,
):
if isinstance(other.field.rel.to, six.string_types):
object_name, app_label = other.field.rel.to.split(".", 1)
else:
object_name = other.field.rel.to._meta.object_name
app_label = other.field.rel.to._meta.app_label
if between.references_model(object_name, app_label):
return None
# OK, that's fine
return [