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Code Issues 32 Releases Wiki Activity

[1.7.x] Fixed #22300 -- Fixed crash in migrations when changing non-relational field to relational.

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Backport of 35ed792cf2 from master
This commit is contained in:
Stephen Burrows
2014-03-21 00:52:49 -07:00
committed by Tim Graham
parent 21eaad68e6
commit b4f165fe94
2 changed files with 24 additions and 1 deletions
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2
django/db/migrations/autodetector.py
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@@ -267,7 +267,7 @@ class MigrationAutodetector(object):
for rem_app_label, rem_model_name, rem_field_name in (old_fields - new_fields):
if rem_app_label == app_label and rem_model_name == model_name:
old_field_dec = old_model_state.get_field_by_name(rem_field_name).deconstruct()[1:]
if field.rel and field.rel.to:
if field.rel and field.rel.to and 'to' in old_field_dec[2]:
old_rel_to = old_field_dec[2]['to']
if old_rel_to in renamed_models_rel:
old_field_dec[2]['to'] = renamed_models_rel[old_rel_to]

23
tests/migrations/test_autodetector.py
View File

@@ -19,6 +19,7 @@ class AutodetectorTests(TestCase):
author_name_default = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200, default='Ada Lovelace'))])
author_with_book = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("book", models.ForeignKey("otherapp.Book"))])
author_renamed_with_book = ModelState("testapp", "Writer", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("book", models.ForeignKey("otherapp.Book"))])
author_with_publisher_string = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("publisher_name", models.CharField(max_length=200))])
author_with_publisher = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("publisher", models.ForeignKey("testapp.Publisher"))])
author_with_custom_user = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=200)), ("user", models.ForeignKey("thirdapp.CustomUser"))])
author_proxy = ModelState("testapp", "AuthorProxy", [], {"proxy": True}, ("testapp.author", ))
@@ -517,3 +518,25 @@ class AutodetectorTests(TestCase):
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "AddField")
self.assertEqual(action.name, "name")
def test_replace_string_with_foreignkey(self):
"""
Adding an FK in the same "spot" as a deleted CharField should work. (#22300).
"""
# Make state
before = self.make_project_state([self.author_with_publisher_string])
after = self.make_project_state([self.author_with_publisher])
autodetector = MigrationAutodetector(before, after)
changes = autodetector._detect_changes()
# Right number of migrations?
self.assertEqual(len(changes['testapp']), 1)
# Right number of actions?
migration = changes['testapp'][0]
self.assertEqual(len(migration.operations), 2)
# Right actions?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "AddField")
self.assertEqual(action.name, "publisher")
action = migration.operations[1]
self.assertEqual(action.__class__.__name__, "RemoveField")
self.assertEqual(action.name, "publisher_name")