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Fixed a regression with get_or_create and virtual fields. 

refs #20429

Thanks Simon Charette for the report and review.
This commit is contained in:
Tim Graham 2013-08-20 14:13:43 -04:00
parent a5cf5da50d
commit f7290581fe
2 changed files with 31 additions and 12 deletions
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20
django/db/models/query.py
View File

@ -411,7 +411,7 @@ class QuerySet(object):
Returns a tuple of (object, created), where created is a boolean
specifying whether an object was created.
"""
lookup, params, _ = self._extract_model_params(defaults, **kwargs)
lookup, params = self._extract_model_params(defaults, **kwargs)
self._for_write = True
try:
return self.get(**lookup), False
@ -425,7 +425,8 @@ class QuerySet(object):
Returns a tuple (object, created), where created is a boolean
specifying whether an object was created.
"""
lookup, params, filtered_defaults = self._extract_model_params(defaults, **kwargs)
defaults = defaults or {}
lookup, params = self._extract_model_params(defaults, **kwargs)
self._for_write = True
try:
obj = self.get(**lookup)
@ -433,12 +434,12 @@ class QuerySet(object):
obj, created = self._create_object_from_params(lookup, params)
if created:
return obj, created
for k, v in six.iteritems(filtered_defaults):
for k, v in six.iteritems(defaults):
setattr(obj, k, v)
sid = transaction.savepoint(using=self.db)
try:
obj.save(update_fields=filtered_defaults.keys(), using=self.db)
obj.save(using=self.db)
transaction.savepoint_commit(sid, using=self.db)
return obj, False
except DatabaseError:
@ -469,22 +470,17 @@ class QuerySet(object):
def _extract_model_params(self, defaults, **kwargs):
"""
Prepares `lookup` (kwargs that are valid model attributes), `params`
(for creating a model instance) and `filtered_defaults` (defaults
that are valid model attributes) based on given kwargs; for use by
(for creating a model instance) based on given kwargs; for use by
get_or_create and update_or_create.
"""
defaults = defaults or {}
filtered_defaults = {}
lookup = kwargs.copy()
for f in self.model._meta.fields:
# Filter out fields that don't belongs to the model.
if f.attname in lookup:
lookup[f.name] = lookup.pop(f.attname)
if f.attname in defaults:
filtered_defaults[f.name] = defaults.pop(f.attname)
params = dict((k, v) for k, v in kwargs.items() if LOOKUP_SEP not in k)
params.update(filtered_defaults)
return lookup, params, filtered_defaults
params.update(defaults)
return lookup, params
def _earliest_or_latest(self, field_name=None, direction="-"):
"""

23
tests/generic_relations/tests.py
View File

@ -263,6 +263,29 @@ class GenericRelationsTests(TestCase):
formset = GenericFormSet(initial=initial_data)
self.assertEqual(formset.forms[0].initial, initial_data[0])
def test_get_or_create(self):
# get_or_create should work with virtual fields (content_object)
quartz = Mineral.objects.create(name="Quartz", hardness=7)
tag, created = TaggedItem.objects.get_or_create(tag="shiny",
defaults={'content_object': quartz})
self.assertTrue(created)
self.assertEqual(tag.tag, "shiny")
self.assertEqual(tag.content_object.id, quartz.id)
def test_update_or_create_defaults(self):
# update_or_create should work with virtual fields (content_object)
quartz = Mineral.objects.create(name="Quartz", hardness=7)
diamond = Mineral.objects.create(name="Diamond", hardness=7)
tag, created = TaggedItem.objects.update_or_create(tag="shiny",
defaults={'content_object': quartz})
self.assertTrue(created)
self.assertEqual(tag.content_object.id, quartz.id)
tag, created = TaggedItem.objects.update_or_create(tag="shiny",
defaults={'content_object': diamond})
self.assertFalse(created)
self.assertEqual(tag.content_object.id, diamond.id)
class CustomWidget(forms.TextInput):
pass