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Code Issues 32 Releases Wiki Activity

[3.1.x] Fixed #31742 -- Fixed makemigrations crash on ForeignKey to an app with mixed case label.

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Regression in 9e1b6b8a66.

Thanks Ignacio Santolin for the report.
Backport of 62d85a2835 from master
This commit is contained in:
Mariusz Felisiak
2020-06-26 23:18:59 +02:00
parent 1a3029b6b4
commit 5263480d7f
2 changed files with 33 additions and 1 deletions
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4
django/db/models/fields/related.py
View File

@@ -582,6 +582,10 @@ class ForeignObject(RelatedField):
if self.remote_field.parent_link:
kwargs['parent_link'] = self.remote_field.parent_link
if isinstance(self.remote_field.model, str):
if '.' in self.remote_field.model:
app_label, model_name = self.remote_field.model.split('.')
kwargs['to'] = '%s.%s' % (app_label, model_name.lower())
else:
kwargs['to'] = self.remote_field.model.lower()
else:
kwargs['to'] = self.remote_field.model._meta.label_lower

28
tests/migrations/test_state.py
View File

@@ -867,6 +867,34 @@ class StateTests(SimpleTestCase):
with self.assertRaisesMessage(ValueError, msg):
project_state.apps
def test_reference_mixed_case_app_label(self):
new_apps = Apps()
class Author(models.Model):
class Meta:
app_label = 'MiXedCase_migrations'
apps = new_apps
class Book(models.Model):
author = models.ForeignKey(Author, models.CASCADE)
class Meta:
app_label = 'MiXedCase_migrations'
apps = new_apps
class Magazine(models.Model):
authors = models.ManyToManyField(Author)
class Meta:
app_label = 'MiXedCase_migrations'
apps = new_apps
project_state = ProjectState()
project_state.add_model(ModelState.from_model(Author))
project_state.add_model(ModelState.from_model(Book))
project_state.add_model(ModelState.from_model(Magazine))
self.assertEqual(len(project_state.apps.get_models()), 3)
def test_real_apps(self):
"""
Including real apps can resolve dangling FK errors.