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Fixed #25160 (again) -- Moved data loss check on reverse relations.

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Moved data loss check when assigning to a reverse one-to-one relation on
an unsaved instance to Model.save(). This is exactly the same change as
e4b813c but for reverse relations.
This commit is contained in:
Aymeric Augustin
2015-09-19 13:36:38 +02:00
parent a4b80e2421
commit c3904deb91
4 changed files with 14 additions and 11 deletions
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6
django/db/models/fields/related.py
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@@ -534,12 +534,6 @@ class SingleRelatedObjectDescriptor(object):
raise ValueError('Cannot assign "%r": the current database router prevents this relation.' % value)
related_pk = tuple(getattr(instance, field.attname) for field in self.related.field.foreign_related_fields)
if None in related_pk:
raise ValueError(
'Cannot assign "%r": "%s" instance isn\'t saved in the database.' %
(value, instance._meta.object_name)
)
# Set the value of the related field to the value of the related object's related field
for index, field in enumerate(self.related.field.local_related_fields):
setattr(value, field.attname, related_pk[index])