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Code Issues 32 Releases Wiki Activity

Implement swappable model support for migrations

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This commit is contained in:
Andrew Godwin
2014-01-15 14:20:47 +00:00
parent 5c7ac7494a
commit c9de1b4a55
10 changed files with 216 additions and 13 deletions
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16
tests/migrations/test_autodetector.py
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@@ -1,5 +1,5 @@
# encoding: utf8
from django.test import TestCase
from django.test import TestCase, override_settings
from django.db.migrations.autodetector import MigrationAutodetector
from django.db.migrations.questioner import MigrationQuestioner
from django.db.migrations.state import ProjectState, ModelState
@@ -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_with_book = ModelState("testapp", "Author", [("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", ))
author_proxy_notproxy = ModelState("testapp", "AuthorProxy", [], {}, ("testapp.author", ))
publisher = ModelState("testapp", "Publisher", [("id", models.AutoField(primary_key=True)), ("name", models.CharField(max_length=100))])
@@ -29,6 +30,7 @@ class AutodetectorTests(TestCase):
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")]})
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))])
def make_project_state(self, model_states):
"Shortcut to make ProjectStates from lists of predefined models"
@@ -355,3 +357,15 @@ class AutodetectorTests(TestCase):
action = migration.operations[0]
self.assertEqual(action.__class__.__name__, "CreateModel")
self.assertEqual(action.name, "AuthorProxy")
@override_settings(AUTH_USER_MODEL="thirdapp.CustomUser")
def test_swappable(self):
before = self.make_project_state([self.custom_user])
after = self.make_project_state([self.custom_user, self.author_with_custom_user])
autodetector = MigrationAutodetector(before, after)
changes = autodetector._detect_changes()
# Right number of migrations?
self.assertEqual(len(changes), 1)
# Check the dependency is correct
migration = changes['testapp'][0]
self.assertEqual(migration.dependencies, [("__setting__", "AUTH_USER_MODEL")])