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314 lines
12 KiB
Python
314 lines
12 KiB
Python
from __future__ import unicode_literals
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from unittest import skipIf
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from django.db import connection, connections
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from django.db.migrations.graph import NodeNotFoundError
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from django.db.migrations.loader import AmbiguityError, MigrationLoader
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from django.db.migrations.recorder import MigrationRecorder
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from django.test import TestCase, modify_settings, override_settings
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from django.utils import six
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class RecorderTests(TestCase):
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"""
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Tests recording migrations as applied or not.
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"""
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def test_apply(self):
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"""
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Tests marking migrations as applied/unapplied.
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"""
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recorder = MigrationRecorder(connection)
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self.assertEqual(
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set((x, y) for (x, y) in recorder.applied_migrations() if x == "myapp"),
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set(),
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)
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recorder.record_applied("myapp", "0432_ponies")
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self.assertEqual(
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set((x, y) for (x, y) in recorder.applied_migrations() if x == "myapp"),
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{("myapp", "0432_ponies")},
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)
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# That should not affect records of another database
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recorder_other = MigrationRecorder(connections['other'])
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self.assertEqual(
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set((x, y) for (x, y) in recorder_other.applied_migrations() if x == "myapp"),
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set(),
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)
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recorder.record_unapplied("myapp", "0432_ponies")
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self.assertEqual(
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set((x, y) for (x, y) in recorder.applied_migrations() if x == "myapp"),
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set(),
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)
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class LoaderTests(TestCase):
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"""
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Tests the disk and database loader, and running through migrations
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in memory.
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"""
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
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@modify_settings(INSTALLED_APPS={'append': 'basic'})
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def test_load(self):
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"""
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Makes sure the loader can load the migrations for the test apps,
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and then render them out to a new Apps.
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"""
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# Load and test the plan
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migration_loader = MigrationLoader(connection)
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self.assertEqual(
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migration_loader.graph.forwards_plan(("migrations", "0002_second")),
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[
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("migrations", "0001_initial"),
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("migrations", "0002_second"),
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],
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)
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# Now render it out!
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project_state = migration_loader.project_state(("migrations", "0002_second"))
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self.assertEqual(len(project_state.models), 2)
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author_state = project_state.models["migrations", "author"]
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self.assertEqual(
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[x for x, y in author_state.fields],
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["id", "name", "slug", "age", "rating"]
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)
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book_state = project_state.models["migrations", "book"]
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self.assertEqual(
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[x for x, y in book_state.fields],
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["id", "author"]
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)
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# Ensure we've included unmigrated apps in there too
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self.assertIn("basic", project_state.real_apps)
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_unmigdep"})
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def test_load_unmigrated_dependency(self):
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"""
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Makes sure the loader can load migrations with a dependency on an unmigrated app.
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"""
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# Load and test the plan
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migration_loader = MigrationLoader(connection)
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self.assertEqual(
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migration_loader.graph.forwards_plan(("migrations", "0001_initial")),
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[
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('contenttypes', '0001_initial'),
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('auth', '0001_initial'),
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("migrations", "0001_initial"),
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],
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)
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# Now render it out!
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project_state = migration_loader.project_state(("migrations", "0001_initial"))
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self.assertEqual(len([m for a, m in project_state.models if a == "migrations"]), 1)
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book_state = project_state.models["migrations", "book"]
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self.assertEqual(
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[x for x, y in book_state.fields],
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["id", "user"]
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)
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_run_before"})
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def test_run_before(self):
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"""
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Makes sure the loader uses Migration.run_before.
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"""
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# Load and test the plan
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migration_loader = MigrationLoader(connection)
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self.assertEqual(
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migration_loader.graph.forwards_plan(("migrations", "0002_second")),
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[
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("migrations", "0001_initial"),
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("migrations", "0003_third"),
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("migrations", "0002_second"),
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],
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)
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@override_settings(MIGRATION_MODULES={
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"migrations": "migrations.test_migrations_first",
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"migrations2": "migrations2.test_migrations_2_first",
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})
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@modify_settings(INSTALLED_APPS={'append': 'migrations2'})
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def test_first(self):
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"""
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Makes sure the '__first__' migrations build correctly.
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"""
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migration_loader = MigrationLoader(connection)
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self.assertEqual(
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migration_loader.graph.forwards_plan(("migrations", "second")),
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[
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("migrations", "thefirst"),
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("migrations2", "0001_initial"),
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("migrations2", "0002_second"),
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("migrations", "second"),
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],
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)
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
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def test_name_match(self):
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"Tests prefix name matching"
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migration_loader = MigrationLoader(connection)
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self.assertEqual(
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migration_loader.get_migration_by_prefix("migrations", "0001").name,
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"0001_initial",
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)
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with self.assertRaises(AmbiguityError):
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migration_loader.get_migration_by_prefix("migrations", "0")
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with self.assertRaises(KeyError):
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migration_loader.get_migration_by_prefix("migrations", "blarg")
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def test_load_import_error(self):
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with override_settings(MIGRATION_MODULES={"migrations": "import_error_package"}):
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with self.assertRaises(ImportError):
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MigrationLoader(connection)
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def test_load_module_file(self):
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with override_settings(MIGRATION_MODULES={"migrations": "migrations.faulty_migrations.file"}):
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MigrationLoader(connection)
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@skipIf(six.PY2, "PY2 doesn't load empty dirs.")
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def test_load_empty_dir(self):
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with override_settings(MIGRATION_MODULES={"migrations": "migrations.faulty_migrations.namespace"}):
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MigrationLoader(connection)
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"})
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def test_loading_squashed(self):
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"Tests loading a squashed migration"
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migration_loader = MigrationLoader(connection)
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recorder = MigrationRecorder(connection)
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# Loading with nothing applied should just give us the one node
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self.assertEqual(
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len([x for x in migration_loader.graph.nodes if x[0] == "migrations"]),
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1,
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)
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# However, fake-apply one migration and it should now use the old two
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recorder.record_applied("migrations", "0001_initial")
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migration_loader.build_graph()
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self.assertEqual(
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len([x for x in migration_loader.graph.nodes if x[0] == "migrations"]),
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2,
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)
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recorder.flush()
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed_complex"})
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def test_loading_squashed_complex(self):
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"Tests loading a complex set of squashed migrations"
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loader = MigrationLoader(connection)
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recorder = MigrationRecorder(connection)
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def num_nodes():
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plan = set(loader.graph.forwards_plan(('migrations', '7_auto')))
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return len(plan - loader.applied_migrations)
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# Empty database: use squashed migration
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loader.build_graph()
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self.assertEqual(num_nodes(), 5)
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# Starting at 1 or 2 should use the squashed migration too
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recorder.record_applied("migrations", "1_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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recorder.record_applied("migrations", "2_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 3)
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# However, starting at 3 to 5 cannot use the squashed migration
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recorder.record_applied("migrations", "3_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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recorder.record_applied("migrations", "4_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 3)
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# Starting at 5 to 7 we are passed the squashed migrations
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recorder.record_applied("migrations", "5_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 2)
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recorder.record_applied("migrations", "6_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 1)
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recorder.record_applied("migrations", "7_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 0)
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recorder.flush()
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@override_settings(MIGRATION_MODULES={
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"app1": "migrations.test_migrations_squashed_complex_multi_apps.app1",
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"app2": "migrations.test_migrations_squashed_complex_multi_apps.app2",
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})
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@modify_settings(INSTALLED_APPS={'append': [
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"migrations.test_migrations_squashed_complex_multi_apps.app1",
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"migrations.test_migrations_squashed_complex_multi_apps.app2",
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]})
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def test_loading_squashed_complex_multi_apps(self):
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loader = MigrationLoader(connection)
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loader.build_graph()
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plan = set(loader.graph.forwards_plan(('app1', '4_auto')))
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expected_plan = set([
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('app1', '4_auto'),
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('app1', '2_squashed_3'),
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('app2', '1_squashed_2'),
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('app1', '1_auto')
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])
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self.assertEqual(plan, expected_plan)
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@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed_erroneous"})
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def test_loading_squashed_erroneous(self):
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"Tests loading a complex but erroneous set of squashed migrations"
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loader = MigrationLoader(connection)
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recorder = MigrationRecorder(connection)
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def num_nodes():
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plan = set(loader.graph.forwards_plan(('migrations', '7_auto')))
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return len(plan - loader.applied_migrations)
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# Empty database: use squashed migration
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loader.build_graph()
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self.assertEqual(num_nodes(), 5)
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# Starting at 1 or 2 should use the squashed migration too
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recorder.record_applied("migrations", "1_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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recorder.record_applied("migrations", "2_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 3)
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# However, starting at 3 or 4 we'd need to use non-existing migrations
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msg = ("Migration migrations.6_auto depends on nonexistent node ('migrations', '5_auto'). "
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"Django tried to replace migration migrations.5_auto with any of "
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"[migrations.3_squashed_5] but wasn't able to because some of the replaced "
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"migrations are already applied.")
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recorder.record_applied("migrations", "3_auto")
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with self.assertRaisesMessage(NodeNotFoundError, msg):
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loader.build_graph()
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recorder.record_applied("migrations", "4_auto")
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with self.assertRaisesMessage(NodeNotFoundError, msg):
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loader.build_graph()
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# Starting at 5 to 7 we are passed the squashed migrations
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recorder.record_applied("migrations", "5_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 2)
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recorder.record_applied("migrations", "6_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 1)
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recorder.record_applied("migrations", "7_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 0)
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recorder.flush()
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