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Fixed #22239 -- Add auto detection of renamed models

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Chris Beaven 2014-03-10 13:38:24 +13:00
parent c564277937
commit 7feb70eef3
3 changed files with 140 additions and 8 deletions
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70
tests/migrations/test_autodetector.py
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@ -18,6 +18,7 @@ class AutodetectorTests(TestCase):
author_name_renamed = ModelState("testapp", "Author", [("id", models.AutoField(primary_key=True)), ("names", models.CharField(max_length=200))])
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 = 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", ))
@ -29,6 +30,8 @@ class AutodetectorTests(TestCase):
other_stable = ModelState("otherapp", "Stable", [("id", models.AutoField(primary_key=True))])
third_thing = ModelState("thirdapp", "Thing", [("id", models.AutoField(primary_key=True))])
book = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Author")), ("title", models.CharField(max_length=200))])
book_with_author_renamed = ModelState("otherapp", "Book", [("id", models.AutoField(primary_key=True)), ("author", models.ForeignKey("testapp.Writer")), ("title", models.CharField(max_length=200))])
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_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")]})
@ -184,6 +187,73 @@ class AutodetectorTests(TestCase):
self.assertEqual(action.old_name, "name")
self.assertEqual(action.new_name, "names")
def test_rename_model(self):
"Tests autodetection of renamed models"
# Make state
before = self.make_project_state([self.author_with_book, self.book])
after = self.make_project_state([self.author_renamed_with_book, self.book_with_author_renamed])
autodetector = MigrationAutodetector(before, after, MigrationQuestioner({"ask_rename_model": True}))
changes = autodetector._detect_changes()
# Right number of migrations for model rename?
self.assertEqual(len(changes['testapp']), 1)
# Right number of actions?
migration = changes['testapp'][0]
self.assertEqual(len(migration.operations), 1)
# Right action?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "RenameModel")
self.assertEqual(action.old_name, "author")
self.assertEqual(action.new_name, "writer")
# Right number of migrations for related field rename?
self.assertEqual(len(changes['otherapp']), 1)
# Right number of actions?
migration = changes['otherapp'][0]
self.assertEqual(len(migration.operations), 1)
# Right action?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "AlterField")
self.assertEqual(action.name, "author")
self.assertEqual(action.field.rel.to.__name__, "Writer")
def test_rename_model_with_renamed_rel_field(self):
"""
Tests autodetection of renamed models while simultaneously renaming one
of the fields that relate to the renamed model.
"""
# Make state
before = self.make_project_state([self.author_with_book, self.book])
after = self.make_project_state([self.author_renamed_with_book, self.book_with_field_and_author_renamed])
autodetector = MigrationAutodetector(before, after, MigrationQuestioner({"ask_rename_model": True, "ask_rename": True}))
changes = autodetector._detect_changes()
# Right number of migrations for model rename?
self.assertEqual(len(changes['testapp']), 1)
# Right number of actions?
migration = changes['testapp'][0]
self.assertEqual(len(migration.operations), 1)
# Right actions?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "RenameModel")
self.assertEqual(action.old_name, "author")
self.assertEqual(action.new_name, "writer")
# Right number of migrations for related field rename?
self.assertEqual(len(changes['otherapp']), 1)
# Right number of actions?
migration = changes['otherapp'][0]
self.assertEqual(len(migration.operations), 2)
# Right actions?
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "RenameField")
self.assertEqual(action.old_name, "author")
self.assertEqual(action.new_name, "writer")
action = migration.operations[1]
self.assertEqual(action.__class__.__name__, "AlterField")
self.assertEqual(action.name, "writer")
self.assertEqual(action.field.rel.to.__name__, "Writer")
def test_fk_dependency(self):
"Tests that having a ForeignKey automatically adds a dependency"
# Make state