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Fixed #7026 -- Fixed misleading/incorrect exception text when adding to a many-to-many set on an object that doesn't yet have a primary-key value. Thanks for the report, ryan@peaceworks.ca

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@7622 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2008-06-12 04:13:16 +00:00
parent 0fd41d63e2
commit 5309e18cbf
2 changed files with 9 additions and 1 deletions
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2
django/db/models/fields/related.py
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@ -351,7 +351,7 @@ def create_many_related_manager(superclass):
self.target_col_name = target_col_name
self._pk_val = self.instance._get_pk_val()
if self._pk_val is None:
raise ValueError("%r instance needs to have a primary key value before a many-to-many relationship can be used." % model)
raise ValueError("%r instance needs to have a primary key value before a many-to-many relationship can be used." % instance.__class__.__name__)
def get_query_set(self):
return superclass.get_query_set(self).filter(**(self.core_filters))

8
tests/modeltests/many_to_many/models.py
View File

@ -39,6 +39,14 @@ __test__ = {'API_TESTS':"""
# Create an Article.
>>> a1 = Article(id=None, headline='Django lets you build Web apps easily')
# You can't associate it with a Publication until it's been saved.
>>> a1.publications.add(p1)
Traceback (most recent call last):
...
ValueError: 'Article' instance needs to have a primary key value before a many-to-many relationship can be used.
# Save it!
>>> a1.save()
# Associate the Article with a Publication.