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Fixed #23014 -- Infinite migration regression with unique/index_together.

This commit is contained in:
Tim Graham 2014-07-24 13:36:15 -04:00
parent b1abfb3c59
commit 64e75c47ef
2 changed files with 20 additions and 10 deletions
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8
django/db/migrations/autodetector.py
View File

@ -795,13 +795,13 @@ class MigrationAutodetector(object):
if old_model_state.options.get(option_name) is None:
old_value = None
else:
old_value = [
[
old_value = set([
tuple(
self.renamed_fields.get((app_label, model_name, n), n)
for n in unique
]
)
for unique in old_model_state.options[option_name]
]
])
if old_value != new_model_state.options.get(option_name):
self.add_operation(
app_label,

22
tests/migrations/test_autodetector.py
View File

@ -66,9 +66,9 @@ class AutodetectorTests(TestCase):
book_with_field_and_author_renamed = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("writer", models.ForeignKey("testapp.Writer")), ("title", models.CharField(max_length=200))])
book_with_multiple_authors = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("authors", models.ManyToManyField("testapp.Author")), ("title", models.CharField(max_length=200))])
book_with_multiple_authors_through_attribution = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("authors", models.ManyToManyField("testapp.Author", through="otherapp.Attribution")), ("title", models.CharField(max_length=200))])
book_unique = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": [("author", "title")]})
book_unique_2 = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": [("title", "author")]})
book_unique_3 = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("newfield", models.IntegerField()), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": [("title", "newfield")]})
book_unique = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": set([("author", "title")])})
book_unique_2 = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": set([("title", "author")])})
book_unique_3 = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("newfield", models.IntegerField()), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))], {"unique_together": set([("title", "newfield")])})
attribution = ModelState("otherapp", "Attribution", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("book", models.ForeignKey("otherapp.Book"))])
edition = ModelState("thirdapp", "Edition", [("id", models.AutoField(primary_key=True)), ("book", models.ForeignKey("otherapp.Book"))])
custom_user = ModelState("thirdapp", "CustomUser", [("id", models.AutoField(primary_key=True)), ("username", models.CharField(max_length=255))], bases=(AbstractBaseUser, ))
@ -77,7 +77,7 @@ class AutodetectorTests(TestCase):
aardvark_based_on_author = ModelState("testapp", "Aardvark", [], bases=("testapp.Author", ))
aardvark_pk_fk_author = ModelState("testapp", "Aardvark", [("id", models.OneToOneField("testapp.Author", primary_key=True))])
knight = ModelState("eggs", "Knight", [("id", models.AutoField(primary_key=True))])
rabbit = ModelState("eggs", "Rabbit", [("id", models.AutoField(primary_key=True)), ("knight", models.ForeignKey("eggs.Knight")), ("parent", models.ForeignKey("eggs.Rabbit"))], {"unique_together": [("parent", "knight")]})
rabbit = ModelState("eggs", "Rabbit", [("id", models.AutoField(primary_key=True)), ("knight", models.ForeignKey("eggs.Knight")), ("parent", models.ForeignKey("eggs.Rabbit"))], {"unique_together": set([("parent", "knight")])})
def repr_changes(self, changes):
output = ""
@ -535,6 +535,16 @@ class AutodetectorTests(TestCase):
self.assertEqual(action.name, "book")
self.assertEqual(action.unique_together, set([("author", "title")]))
def test_unique_together_no_changes(self):
"Tests that unique_togther doesn't generate a migration if no changes have been made"
# Make state
before = self.make_project_state([self.author_empty, self.book_unique])
after = self.make_project_state([self.author_empty, self.book_unique])
autodetector = MigrationAutodetector(before, after)
changes = autodetector._detect_changes()
# Right number of migrations?
self.assertEqual(len(changes), 0)
def test_unique_together_ordering(self):
"Tests that unique_together also triggers on ordering changes"
# Make state
@ -574,7 +584,7 @@ class AutodetectorTests(TestCase):
def test_remove_index_together(self):
author_index_together = ModelState("testapp", "Author", [
("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200))
], {"index_together": [("id", "name")]})
], {"index_together": set([("id", "name")])})
before = self.make_project_state([author_index_together])
after = self.make_project_state([self.author_name])
@ -593,7 +603,7 @@ class AutodetectorTests(TestCase):
def test_remove_unique_together(self):
author_unique_together = ModelState("testapp", "Author", [
("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200))
], {"unique_together": [("id", "name")]})
], {"unique_together": set([("id", "name")])})
before = self.make_project_state([author_unique_together])
after = self.make_project_state([self.author_name])