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Fixed #24725 -- Allowed renaming of target models in ManyToMany relations

Browse source 
This is a regression caused by introducing rendered migration states in
1aa3e09c20 and the _meta refactoring in fb48eb0581.

Thanks to Danilo Bargen for reporting the issue and Marten Kenbeek and
Tim Graham for triaging the bug and providing the initial test case.
This commit is contained in:
Markus Holtermann 2015-04-30 01:39:50 +02:00
parent cf34ee68f0
commit 63f9b633f9
3 changed files with 30 additions and 1 deletions
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26
tests/migrations/test_operations.py
View file

@ -614,6 +614,32 @@ class OperationTests(OperationTestBase):
self.assertEqual(Rider.objects.count(), 2)
self.assertEqual(Pony._meta.get_field('riders').remote_field.through.objects.count(), 2)
def test_rename_m2m_target_model(self):
app_label = "test_rename_m2m_target_model"
project_state = self.apply_operations(app_label, ProjectState(), operations=[
migrations.CreateModel("Rider", fields=[]),
migrations.CreateModel("Pony", fields=[
("riders", models.ManyToManyField("Rider")),
]),
])
Pony = project_state.apps.get_model(app_label, "Pony")
Rider = project_state.apps.get_model(app_label, "Rider")
pony = Pony.objects.create()
rider = Rider.objects.create()
pony.riders.add(rider)
project_state = self.apply_operations(app_label, project_state, operations=[
migrations.RenameModel("Rider", "Rider2"),
])
Pony = project_state.apps.get_model(app_label, "Pony")
Rider = project_state.apps.get_model(app_label, "Rider2")
pony = Pony.objects.create()
rider = Rider.objects.create()
pony.riders.add(rider)
self.assertEqual(Pony.objects.count(), 2)
self.assertEqual(Rider.objects.count(), 2)
self.assertEqual(Pony._meta.get_field('riders').remote_field.through.objects.count(), 2)
def test_add_field(self):
"""
Tests the AddField operation.