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676 lines
25 KiB
Python
676 lines
25 KiB
Python
import compileall
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import os
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from importlib import import_module
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from django.db import connection, connections
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from django.db.migrations.exceptions import (
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AmbiguityError,
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InconsistentMigrationHistory,
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NodeNotFoundError,
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)
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from django.db.migrations.loader import 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 .test_base import MigrationTestBase
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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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databases = {"default", "other"}
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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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{(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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{(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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{(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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{(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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def setUp(self):
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self.applied_records = []
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def tearDown(self):
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# Unapply records on databases that don't roll back changes after each
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# test method.
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if not connection.features.supports_transactions:
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for recorder, app, name in self.applied_records:
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recorder.record_unapplied(app, name)
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def record_applied(self, recorder, app, name):
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recorder.record_applied(app, name)
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self.applied_records.append((recorder, app, name))
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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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list(author_state.fields), ["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(list(book_state.fields), ["id", "author"])
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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(
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MIGRATION_MODULES={
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"migrations": "migrations.test_migrations",
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"migrations2": "migrations2.test_migrations_2",
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}
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)
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@modify_settings(INSTALLED_APPS={"append": "migrations2"})
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def test_plan_handles_repeated_migrations(self):
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"""
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_generate_plan() doesn't readd migrations already in the plan (#29180).
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"""
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migration_loader = MigrationLoader(connection)
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nodes = [("migrations", "0002_second"), ("migrations2", "0001_initial")]
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self.assertEqual(
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migration_loader.graph._generate_plan(nodes, at_end=True),
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[
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("migrations", "0001_initial"),
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("migrations", "0002_second"),
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("migrations2", "0001_initial"),
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],
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)
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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations_unmigdep"}
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)
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def test_load_unmigrated_dependency(self):
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"""
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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(
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len([m for a, m in project_state.models if a == "migrations"]), 1
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)
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book_state = project_state.models["migrations", "book"]
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self.assertEqual(list(book_state.fields), ["id", "user"])
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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations_run_before"}
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)
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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(
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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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)
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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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msg = "There is more than one migration for 'migrations' with the prefix '0'"
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with self.assertRaisesMessage(AmbiguityError, msg):
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migration_loader.get_migration_by_prefix("migrations", "0")
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msg = "There is no migration for 'migrations' with the prefix 'blarg'"
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with self.assertRaisesMessage(KeyError, msg):
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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(
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MIGRATION_MODULES={"migrations": "import_error_package"}
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):
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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(
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MIGRATION_MODULES={"migrations": "migrations.faulty_migrations.file"}
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):
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loader = MigrationLoader(connection)
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self.assertIn(
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"migrations",
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loader.unmigrated_apps,
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"App with migrations module file not in unmigrated apps.",
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)
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def test_load_empty_dir(self):
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with override_settings(
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MIGRATION_MODULES={"migrations": "migrations.faulty_migrations.namespace"}
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):
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loader = MigrationLoader(connection)
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self.assertIn(
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"migrations",
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loader.unmigrated_apps,
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"App missing __init__.py in migrations module not in unmigrated apps.",
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)
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@override_settings(
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INSTALLED_APPS=["migrations.migrations_test_apps.migrated_app"],
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)
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def test_marked_as_migrated(self):
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"""
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Undefined MIGRATION_MODULES implies default migration module.
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"""
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migration_loader = MigrationLoader(connection)
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self.assertEqual(migration_loader.migrated_apps, {"migrated_app"})
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self.assertEqual(migration_loader.unmigrated_apps, set())
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@override_settings(
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INSTALLED_APPS=["migrations.migrations_test_apps.migrated_app"],
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MIGRATION_MODULES={"migrated_app": None},
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)
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def test_marked_as_unmigrated(self):
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"""
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MIGRATION_MODULES allows disabling of migrations for a particular app.
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"""
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migration_loader = MigrationLoader(connection)
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self.assertEqual(migration_loader.migrated_apps, set())
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self.assertEqual(migration_loader.unmigrated_apps, {"migrated_app"})
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@override_settings(
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INSTALLED_APPS=["migrations.migrations_test_apps.migrated_app"],
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MIGRATION_MODULES={"migrated_app": "missing-module"},
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)
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def test_explicit_missing_module(self):
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"""
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If a MIGRATION_MODULES override points to a missing module, the error
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raised during the importation attempt should be propagated unless
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`ignore_no_migrations=True`.
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"""
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with self.assertRaisesMessage(ImportError, "missing-module"):
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migration_loader = MigrationLoader(connection)
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migration_loader = MigrationLoader(connection, ignore_no_migrations=True)
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self.assertEqual(migration_loader.migrated_apps, set())
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self.assertEqual(migration_loader.unmigrated_apps, {"migrated_app"})
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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"}
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)
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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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self.addCleanup(recorder.flush)
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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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self.record_applied(recorder, "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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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed_complex"}
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)
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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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self.addCleanup(recorder.flush)
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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.keys())
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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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self.record_applied(recorder, "migrations", "1_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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self.record_applied(recorder, "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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self.record_applied(recorder, "migrations", "3_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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self.record_applied(recorder, "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 past the squashed migrations.
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self.record_applied(recorder, "migrations", "5_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 2)
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self.record_applied(recorder, "migrations", "6_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 1)
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self.record_applied(recorder, "migrations", "7_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 0)
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@override_settings(
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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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)
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@modify_settings(
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INSTALLED_APPS={
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"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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}
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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 = {
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("app1", "1_auto"),
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("app2", "1_squashed_2"),
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("app1", "2_squashed_3"),
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("app1", "4_auto"),
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}
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self.assertEqual(plan, expected_plan)
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@override_settings(
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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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)
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@modify_settings(
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INSTALLED_APPS={
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"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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}
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)
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def test_loading_squashed_complex_multi_apps_partially_applied(self):
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loader = MigrationLoader(connection)
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recorder = MigrationRecorder(connection)
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self.record_applied(recorder, "app1", "1_auto")
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self.record_applied(recorder, "app1", "2_auto")
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loader.build_graph()
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plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
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plan -= loader.applied_migrations.keys()
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expected_plan = {
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("app2", "1_squashed_2"),
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("app1", "3_auto"),
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("app1", "4_auto"),
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}
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self.assertEqual(plan, expected_plan)
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@override_settings(
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MIGRATION_MODULES={
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"migrations": "migrations.test_migrations_squashed_erroneous"
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}
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)
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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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self.addCleanup(recorder.flush)
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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.keys())
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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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self.record_applied(recorder, "migrations", "1_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 4)
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self.record_applied(recorder, "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, nonexistent migrations would be needed.
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msg = (
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"Migration migrations.6_auto depends on nonexistent node "
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"('migrations', '5_auto'). Django tried to replace migration "
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"migrations.5_auto with any of [migrations.3_squashed_5] but wasn't able "
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"to because some of the replaced migrations are already applied."
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)
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self.record_applied(recorder, "migrations", "3_auto")
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with self.assertRaisesMessage(NodeNotFoundError, msg):
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loader.build_graph()
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self.record_applied(recorder, "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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self.record_applied(recorder, "migrations", "5_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 2)
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self.record_applied(recorder, "migrations", "6_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 1)
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self.record_applied(recorder, "migrations", "7_auto")
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loader.build_graph()
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self.assertEqual(num_nodes(), 0)
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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations"},
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INSTALLED_APPS=["migrations"],
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)
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def test_check_consistent_history(self):
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loader = MigrationLoader(connection=None)
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loader.check_consistent_history(connection)
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recorder = MigrationRecorder(connection)
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self.record_applied(recorder, "migrations", "0002_second")
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msg = (
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"Migration migrations.0002_second is applied before its dependency "
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"migrations.0001_initial on database 'default'."
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)
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with self.assertRaisesMessage(InconsistentMigrationHistory, msg):
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loader.check_consistent_history(connection)
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@override_settings(
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MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed_extra"},
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INSTALLED_APPS=["migrations"],
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)
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def test_check_consistent_history_squashed(self):
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"""
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|
MigrationLoader.check_consistent_history() should ignore unapplied
|
|
squashed migrations that have all of their `replaces` applied.
|
|
"""
|
|
loader = MigrationLoader(connection=None)
|
|
recorder = MigrationRecorder(connection)
|
|
self.record_applied(recorder, "migrations", "0001_initial")
|
|
self.record_applied(recorder, "migrations", "0002_second")
|
|
loader.check_consistent_history(connection)
|
|
self.record_applied(recorder, "migrations", "0003_third")
|
|
loader.check_consistent_history(connection)
|
|
|
|
@override_settings(
|
|
MIGRATION_MODULES={
|
|
"app1": "migrations.test_migrations_squashed_ref_squashed.app1",
|
|
"app2": "migrations.test_migrations_squashed_ref_squashed.app2",
|
|
}
|
|
)
|
|
@modify_settings(
|
|
INSTALLED_APPS={
|
|
"append": [
|
|
"migrations.test_migrations_squashed_ref_squashed.app1",
|
|
"migrations.test_migrations_squashed_ref_squashed.app2",
|
|
]
|
|
}
|
|
)
|
|
def test_loading_squashed_ref_squashed(self):
|
|
"Tests loading a squashed migration with a new migration referencing it"
|
|
r"""
|
|
The sample migrations are structured like this:
|
|
|
|
app_1 1 --> 2 ---------------------*--> 3 *--> 4
|
|
\ / /
|
|
*-------------------*----/--> 2_sq_3 --*
|
|
\ / /
|
|
=============== \ ============= / == / ======================
|
|
app_2 *--> 1_sq_2 --* /
|
|
\ /
|
|
*--> 1 --> 2 --*
|
|
|
|
Where 2_sq_3 is a replacing migration for 2 and 3 in app_1,
|
|
as 1_sq_2 is a replacing migration for 1 and 2 in app_2.
|
|
"""
|
|
|
|
loader = MigrationLoader(connection)
|
|
recorder = MigrationRecorder(connection)
|
|
self.addCleanup(recorder.flush)
|
|
|
|
# Load with nothing applied: both migrations squashed.
|
|
loader.build_graph()
|
|
plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
|
|
plan -= loader.applied_migrations.keys()
|
|
expected_plan = {
|
|
("app1", "1_auto"),
|
|
("app2", "1_squashed_2"),
|
|
("app1", "2_squashed_3"),
|
|
("app1", "4_auto"),
|
|
}
|
|
self.assertEqual(plan, expected_plan)
|
|
|
|
# Load with nothing applied and migrate to a replaced migration.
|
|
# Not possible if loader.replace_migrations is True (default).
|
|
loader.build_graph()
|
|
msg = "Node ('app1', '3_auto') not a valid node"
|
|
with self.assertRaisesMessage(NodeNotFoundError, msg):
|
|
loader.graph.forwards_plan(("app1", "3_auto"))
|
|
# Possible if loader.replace_migrations is False.
|
|
loader.replace_migrations = False
|
|
loader.build_graph()
|
|
plan = set(loader.graph.forwards_plan(("app1", "3_auto")))
|
|
plan -= loader.applied_migrations.keys()
|
|
expected_plan = {
|
|
("app1", "1_auto"),
|
|
("app2", "1_auto"),
|
|
("app2", "2_auto"),
|
|
("app1", "2_auto"),
|
|
("app1", "3_auto"),
|
|
}
|
|
self.assertEqual(plan, expected_plan)
|
|
loader.replace_migrations = True
|
|
|
|
# Fake-apply a few from app1: unsquashes migration in app1.
|
|
self.record_applied(recorder, "app1", "1_auto")
|
|
self.record_applied(recorder, "app1", "2_auto")
|
|
loader.build_graph()
|
|
plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
|
|
plan -= loader.applied_migrations.keys()
|
|
expected_plan = {
|
|
("app2", "1_squashed_2"),
|
|
("app1", "3_auto"),
|
|
("app1", "4_auto"),
|
|
}
|
|
self.assertEqual(plan, expected_plan)
|
|
|
|
# Fake-apply one from app2: unsquashes migration in app2 too.
|
|
self.record_applied(recorder, "app2", "1_auto")
|
|
loader.build_graph()
|
|
plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
|
|
plan -= loader.applied_migrations.keys()
|
|
expected_plan = {
|
|
("app2", "2_auto"),
|
|
("app1", "3_auto"),
|
|
("app1", "4_auto"),
|
|
}
|
|
self.assertEqual(plan, expected_plan)
|
|
|
|
@override_settings(
|
|
MIGRATION_MODULES={"migrations": "migrations.test_migrations_private"}
|
|
)
|
|
def test_ignore_files(self):
|
|
"""Files prefixed with underscore, tilde, or dot aren't loaded."""
|
|
loader = MigrationLoader(connection)
|
|
loader.load_disk()
|
|
migrations = [
|
|
name for app, name in loader.disk_migrations if app == "migrations"
|
|
]
|
|
self.assertEqual(migrations, ["0001_initial"])
|
|
|
|
@override_settings(
|
|
MIGRATION_MODULES={
|
|
"migrations": "migrations.test_migrations_namespace_package"
|
|
},
|
|
)
|
|
def test_loading_namespace_package(self):
|
|
"""Migration directories without an __init__.py file are ignored."""
|
|
loader = MigrationLoader(connection)
|
|
loader.load_disk()
|
|
migrations = [
|
|
name for app, name in loader.disk_migrations if app == "migrations"
|
|
]
|
|
self.assertEqual(migrations, [])
|
|
|
|
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
|
|
def test_loading_package_without__file__(self):
|
|
"""
|
|
To support frozen environments, MigrationLoader loads migrations from
|
|
regular packages with no __file__ attribute.
|
|
"""
|
|
test_module = import_module("migrations.test_migrations")
|
|
loader = MigrationLoader(connection)
|
|
# __file__ == __spec__.origin or the latter is None and former is
|
|
# undefined.
|
|
module_file = test_module.__file__
|
|
module_origin = test_module.__spec__.origin
|
|
module_has_location = test_module.__spec__.has_location
|
|
try:
|
|
del test_module.__file__
|
|
test_module.__spec__.origin = None
|
|
test_module.__spec__.has_location = False
|
|
loader.load_disk()
|
|
migrations = [
|
|
name for app, name in loader.disk_migrations if app == "migrations"
|
|
]
|
|
self.assertCountEqual(migrations, ["0001_initial", "0002_second"])
|
|
finally:
|
|
test_module.__file__ = module_file
|
|
test_module.__spec__.origin = module_origin
|
|
test_module.__spec__.has_location = module_has_location
|
|
|
|
|
|
class PycLoaderTests(MigrationTestBase):
|
|
def test_valid(self):
|
|
"""
|
|
To support frozen environments, MigrationLoader loads .pyc migrations.
|
|
"""
|
|
with self.temporary_migration_module(
|
|
module="migrations.test_migrations"
|
|
) as migration_dir:
|
|
# Compile .py files to .pyc files and delete .py files.
|
|
compileall.compile_dir(migration_dir, force=True, quiet=1, legacy=True)
|
|
for name in os.listdir(migration_dir):
|
|
if name.endswith(".py"):
|
|
os.remove(os.path.join(migration_dir, name))
|
|
loader = MigrationLoader(connection)
|
|
self.assertIn(("migrations", "0001_initial"), loader.disk_migrations)
|
|
|
|
def test_invalid(self):
|
|
"""
|
|
MigrationLoader reraises ImportErrors caused by "bad magic number" pyc
|
|
files with a more helpful message.
|
|
"""
|
|
with self.temporary_migration_module(
|
|
module="migrations.test_migrations_bad_pyc"
|
|
) as migration_dir:
|
|
# The -tpl suffix is to avoid the pyc exclusion in MANIFEST.in.
|
|
os.rename(
|
|
os.path.join(migration_dir, "0001_initial.pyc-tpl"),
|
|
os.path.join(migration_dir, "0001_initial.pyc"),
|
|
)
|
|
msg = (
|
|
r"Couldn't import '\w+.migrations.0001_initial' as it appears "
|
|
"to be a stale .pyc file."
|
|
)
|
|
with self.assertRaisesRegex(ImportError, msg):
|
|
MigrationLoader(connection)
|