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[1.7.x] Fixed #23859 -- Fixed a migration crash when a field is renamed that is part of an index_together 

Backport of 7b4a994599 from master.
This commit is contained in:
Markus Holtermann 2014-11-17 19:04:38 +01:00 committed by Carl Meyer
parent 49d4095767
commit 03d983f7c3
3 changed files with 16 additions and 8 deletions
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13
django/db/migrations/operations/fields.py
View File

@ -177,13 +177,14 @@ class RenameField(Operation):
(self.new_name if n == self.old_name else n, f)
for n, f in state.models[app_label, self.model_name.lower()].fields
]
# Fix unique_together to refer to the new field
# Fix index/unique_together to refer to the new field
options = state.models[app_label, self.model_name.lower()].options
if "unique_together" in options:
options['unique_together'] = [
[self.new_name if n == self.old_name else n for n in unique]
for unique in options['unique_together']
]
for option in ('index_together', 'unique_together'):
if option in options:
options[option] = [
[self.new_name if n == self.old_name else n for n in together]
for together in options[option]
]
def database_forwards(self, app_label, schema_editor, from_state, to_state):
to_model = to_state.render().get_model(app_label, self.model_name)

3
docs/releases/1.7.2.txt
View File

@ -59,3 +59,6 @@ Bugfixes
* Fixed a custom field type validation error with MySQL backend when
``db_type`` returned ``None`` (:ticket:`23761`).
* Fixed a migration crash when a field is renamed that is part of an
``index_together`` (:ticket:`23859`).

8
tests/migrations/test_operations.py
View File

@ -48,7 +48,7 @@ class OperationTestBase(MigrationTestBase):
def set_up_test_model(self, app_label, second_model=False, third_model=False,
related_model=False, mti_model=False, proxy_model=False,
unique_together=False, options=False, db_table=None):
unique_together=False, options=False, db_table=None, index_together=False):
"""
Creates a test model state and database table.
"""
@ -80,6 +80,7 @@ class OperationTestBase(MigrationTestBase):
# Make the "current" state
model_options = {
"swappable": "TEST_SWAP_MODEL",
"index_together": [["pink", "weight"]] if index_together else [],
"unique_together": [["pink", "weight"]] if unique_together else [],
}
if options:
@ -983,7 +984,7 @@ class OperationTests(OperationTestBase):
"""
Tests the RenameField operation.
"""
project_state = self.set_up_test_model("test_rnfl", unique_together=True)
project_state = self.set_up_test_model("test_rnfl", unique_together=True, index_together=True)
# Test the state alteration
operation = migrations.RenameField("Pony", "pink", "blue")
self.assertEqual(operation.describe(), "Rename field pink on Pony to blue")
@ -994,6 +995,9 @@ class OperationTests(OperationTestBase):
# Make sure the unique_together has the renamed column too
self.assertIn("blue", new_state.models["test_rnfl", "pony"].options['unique_together'][0])
self.assertNotIn("pink", new_state.models["test_rnfl", "pony"].options['unique_together'][0])
# Make sure the index_together has the renamed column too
self.assertIn("blue", new_state.models["test_rnfl", "pony"].options['index_together'][0])
self.assertNotIn("pink", new_state.models["test_rnfl", "pony"].options['index_together'][0])
# Test the database alteration
self.assertColumnExists("test_rnfl_pony", "pink")
self.assertColumnNotExists("test_rnfl_pony", "blue")