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Code Issues 25 Releases Wiki Activity

Fixed #31382 -- Made Model.save(update_fields=...) raise ValueError on non-concrete fields.

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Pat Garcia 2020-08-11 21:05:03 -04:00 committed by Mariusz Felisiak
parent 94ea79be13
commit 8954f255bb
3 changed files with 25 additions and 5 deletions
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10
django/db/models/base.py
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@ -727,7 +727,7 @@ class Model(metaclass=ModelBase):
update_fields = frozenset(update_fields) update_fields = frozenset(update_fields)
field_names = set() field_names = set()
for field in self._meta.fields: for field in self._meta.concrete_fields:
if not field.primary_key: if not field.primary_key:
field_names.add(field.name) field_names.add(field.name)
@ -737,9 +737,11 @@ class Model(metaclass=ModelBase):
non_model_fields = update_fields.difference(field_names) non_model_fields = update_fields.difference(field_names)
if non_model_fields: if non_model_fields:
raise ValueError("The following fields do not exist in this " raise ValueError(
"model or are m2m fields: %s" 'The following fields do not exist in this model, are m2m '
% ', '.join(non_model_fields)) 'fields, or are non-concrete fields: %s'
% ', '.join(non_model_fields)
)
# If saving to the same database, and this model is deferred, then # If saving to the same database, and this model is deferred, then
# automatically do an "update_fields" save on the loaded fields. # automatically do an "update_fields" save on the loaded fields.

10
tests/update_only_fields/models.py
View File

@ -22,9 +22,19 @@ class Employee(Person):
accounts = models.ManyToManyField('Account', related_name='employees', blank=True) accounts = models.ManyToManyField('Account', related_name='employees', blank=True)
class NonConcreteField(models.IntegerField):
def db_type(self, connection):
return None
def get_attname_column(self):
attname, _ = super().get_attname_column()
return attname, None
class Profile(models.Model): class Profile(models.Model):
name = models.CharField(max_length=200) name = models.CharField(max_length=200)
salary = models.FloatField(default=1000.0) salary = models.FloatField(default=1000.0)
non_concrete = NonConcreteField()
class ProxyEmployee(Employee): class ProxyEmployee(Employee):

10
tests/update_only_fields/tests.py
View File

@ -5,7 +5,10 @@ from .models import Account, Employee, Person, Profile, ProxyEmployee
class UpdateOnlyFieldsTests(TestCase): class UpdateOnlyFieldsTests(TestCase):
msg = 'The following fields do not exist in this model or are m2m fields: %s' msg = (
'The following fields do not exist in this model, are m2m fields, or '
'are non-concrete fields: %s'
)
def test_update_fields_basic(self): def test_update_fields_basic(self):
s = Person.objects.create(name='Sara', gender='F') s = Person.objects.create(name='Sara', gender='F')
@ -254,3 +257,8 @@ class UpdateOnlyFieldsTests(TestCase):
self.assertEqual(Person.objects.count(), 1) self.assertEqual(Person.objects.count(), 1)
with self.assertNumQueries(2): with self.assertNumQueries(2):
s.save(update_fields=['name', 'employee_num']) s.save(update_fields=['name', 'employee_num'])
def test_update_non_concrete_field(self):
profile_boss = Profile.objects.create(name='Boss', salary=3000)
with self.assertRaisesMessage(ValueError, self.msg % 'non_concrete'):
profile_boss.save(update_fields=['non_concrete'])