import datetime import importlib import io import os import shutil import sys from pathlib import Path from unittest import mock from django.apps import apps from django.core.management import CommandError, call_command from django.core.management.commands.makemigrations import ( Command as MakeMigrationsCommand, ) from django.core.management.commands.migrate import Command as MigrateCommand from django.db import ( ConnectionHandler, DatabaseError, OperationalError, connection, connections, models, ) from django.db.backends.base.schema import BaseDatabaseSchemaEditor from django.db.backends.utils import truncate_name from django.db.migrations.autodetector import MigrationAutodetector from django.db.migrations.exceptions import InconsistentMigrationHistory from django.db.migrations.recorder import MigrationRecorder from django.test import TestCase, override_settings, skipUnlessDBFeature from django.test.utils import captured_stdout, extend_sys_path, isolate_apps from django.utils import timezone from django.utils.version import get_docs_version from .models import UnicodeModel, UnserializableModel from .routers import TestRouter from .test_base import MigrationTestBase HAS_BLACK = shutil.which("black") class MigrateTests(MigrationTestBase): """ Tests running the migrate command. """ databases = {"default", "other"} @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_migrate(self): """ Tests basic usage of the migrate command. """ # No tables are created self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableNotExists("migrations_book") # Run the migrations to 0001 only stdout = io.StringIO() call_command( "migrate", "migrations", "0001", verbosity=2, stdout=stdout, no_color=True ) stdout = stdout.getvalue() self.assertIn( "Target specific migration: 0001_initial, from migrations", stdout ) self.assertIn("Applying migrations.0001_initial... OK", stdout) self.assertIn("Running pre-migrate handlers for application migrations", stdout) self.assertIn( "Running post-migrate handlers for application migrations", stdout ) # The correct tables exist self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") self.assertTableNotExists("migrations_book") # Run migrations all the way call_command("migrate", verbosity=0) # The correct tables exist self.assertTableExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableExists("migrations_book") # Unmigrate everything stdout = io.StringIO() call_command( "migrate", "migrations", "zero", verbosity=2, stdout=stdout, no_color=True ) stdout = stdout.getvalue() self.assertIn("Unapply all migrations: migrations", stdout) self.assertIn("Unapplying migrations.0002_second... OK", stdout) self.assertIn("Running pre-migrate handlers for application migrations", stdout) self.assertIn( "Running post-migrate handlers for application migrations", stdout ) # Tables are gone self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableNotExists("migrations_book") @override_settings( INSTALLED_APPS=[ "django.contrib.auth", "django.contrib.contenttypes", "migrations.migrations_test_apps.migrated_app", ] ) def test_migrate_with_system_checks(self): out = io.StringIO() call_command("migrate", skip_checks=False, no_color=True, stdout=out) self.assertIn("Apply all migrations: migrated_app", out.getvalue()) @override_settings( INSTALLED_APPS=[ "migrations", "migrations.migrations_test_apps.unmigrated_app_syncdb", ] ) def test_app_without_migrations(self): msg = "App 'unmigrated_app_syncdb' does not have migrations." with self.assertRaisesMessage(CommandError, msg): call_command("migrate", app_label="unmigrated_app_syncdb") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_clashing_prefix"} ) def test_ambiguous_prefix(self): msg = ( "More than one migration matches 'a' in app 'migrations'. Please " "be more specific." ) with self.assertRaisesMessage(CommandError, msg): call_command("migrate", app_label="migrations", migration_name="a") @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_unknown_prefix(self): msg = "Cannot find a migration matching 'nonexistent' from app 'migrations'." with self.assertRaisesMessage(CommandError, msg): call_command( "migrate", app_label="migrations", migration_name="nonexistent" ) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_initial_false"} ) def test_migrate_initial_false(self): """ `Migration.initial = False` skips fake-initial detection. """ # Make sure no tables are created self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Run the migrations to 0001 only call_command("migrate", "migrations", "0001", verbosity=0) # Fake rollback call_command("migrate", "migrations", "zero", fake=True, verbosity=0) # Make sure fake-initial detection does not run with self.assertRaises(DatabaseError): call_command( "migrate", "migrations", "0001", fake_initial=True, verbosity=0 ) call_command("migrate", "migrations", "0001", fake=True, verbosity=0) # Real rollback call_command("migrate", "migrations", "zero", verbosity=0) # Make sure it's all gone self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableNotExists("migrations_book") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations"}, DATABASE_ROUTERS=["migrations.routers.TestRouter"], ) def test_migrate_fake_initial(self): """ --fake-initial only works if all tables created in the initial migration of an app exists. Database routers must be obeyed when doing that check. """ # Make sure no tables are created for db in self.databases: self.assertTableNotExists("migrations_author", using=db) self.assertTableNotExists("migrations_tribble", using=db) try: # Run the migrations to 0001 only call_command("migrate", "migrations", "0001", verbosity=0) call_command("migrate", "migrations", "0001", verbosity=0, database="other") # Make sure the right tables exist self.assertTableExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Also check the "other" database self.assertTableNotExists("migrations_author", using="other") self.assertTableExists("migrations_tribble", using="other") # Fake a roll-back call_command("migrate", "migrations", "zero", fake=True, verbosity=0) call_command( "migrate", "migrations", "zero", fake=True, verbosity=0, database="other", ) # Make sure the tables still exist self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble", using="other") # Try to run initial migration with self.assertRaises(DatabaseError): call_command("migrate", "migrations", "0001", verbosity=0) # Run initial migration with an explicit --fake-initial out = io.StringIO() with mock.patch( "django.core.management.color.supports_color", lambda *args: False ): call_command( "migrate", "migrations", "0001", fake_initial=True, stdout=out, verbosity=1, ) call_command( "migrate", "migrations", "0001", fake_initial=True, verbosity=0, database="other", ) self.assertIn("migrations.0001_initial... faked", out.getvalue().lower()) # Run migrations all the way. call_command("migrate", verbosity=0) call_command("migrate", verbosity=0, database="other") self.assertTableExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableExists("migrations_book") self.assertTableNotExists("migrations_author", using="other") self.assertTableNotExists("migrations_tribble", using="other") self.assertTableNotExists("migrations_book", using="other") # Fake a roll-back. call_command("migrate", "migrations", "zero", fake=True, verbosity=0) call_command( "migrate", "migrations", "zero", fake=True, verbosity=0, database="other", ) self.assertTableExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableExists("migrations_book") # Run initial migration. with self.assertRaises(DatabaseError): call_command("migrate", "migrations", verbosity=0) # Run initial migration with an explicit --fake-initial. with self.assertRaises(DatabaseError): # Fails because "migrations_tribble" does not exist but needs # to in order to make --fake-initial work. call_command("migrate", "migrations", fake_initial=True, verbosity=0) # Fake an apply. call_command("migrate", "migrations", fake=True, verbosity=0) call_command( "migrate", "migrations", fake=True, verbosity=0, database="other" ) finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) call_command("migrate", "migrations", "zero", verbosity=0, database="other") # Make sure it's all gone for db in self.databases: self.assertTableNotExists("migrations_author", using=db) self.assertTableNotExists("migrations_tribble", using=db) self.assertTableNotExists("migrations_book", using=db) @skipUnlessDBFeature("ignores_table_name_case") def test_migrate_fake_initial_case_insensitive(self): with override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_fake_initial_case_insensitive.initial", } ): call_command("migrate", "migrations", "0001", verbosity=0) call_command("migrate", "migrations", "zero", fake=True, verbosity=0) with override_settings( MIGRATION_MODULES={ "migrations": ( "migrations.test_fake_initial_case_insensitive.fake_initial" ), } ): out = io.StringIO() call_command( "migrate", "migrations", "0001", fake_initial=True, stdout=out, verbosity=1, no_color=True, ) self.assertIn( "migrations.0001_initial... faked", out.getvalue().lower(), ) @override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_migrations_fake_split_initial" } ) def test_migrate_fake_split_initial(self): """ Split initial migrations can be faked with --fake-initial. """ try: call_command("migrate", "migrations", "0002", verbosity=0) call_command("migrate", "migrations", "zero", fake=True, verbosity=0) out = io.StringIO() with mock.patch( "django.core.management.color.supports_color", lambda *args: False ): call_command( "migrate", "migrations", "0002", fake_initial=True, stdout=out, verbosity=1, ) value = out.getvalue().lower() self.assertIn("migrations.0001_initial... faked", value) self.assertIn("migrations.0002_second... faked", value) finally: # Fake an apply. call_command("migrate", "migrations", fake=True, verbosity=0) # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"} ) def test_migrate_conflict_exit(self): """ migrate exits if it detects a conflict. """ msg = ( "Conflicting migrations detected; multiple leaf nodes in the " "migration graph: (0002_conflicting_second, 0002_second in " "migrations).\n" "To fix them run 'python manage.py makemigrations --merge'" ) with self.assertRaisesMessage(CommandError, msg): call_command("migrate", "migrations") @override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_migrations", } ) def test_migrate_check(self): with self.assertRaises(SystemExit): call_command("migrate", "migrations", "0001", check_unapplied=True) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") self.assertTableNotExists("migrations_book") @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.migrated_app", ] ) def test_migrate_check_migrated_app(self): out = io.StringIO() try: call_command("migrate", "migrated_app", verbosity=0) call_command( "migrate", "migrated_app", stdout=out, check_unapplied=True, ) self.assertEqual(out.getvalue(), "") finally: # Unmigrate everything. call_command("migrate", "migrated_app", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_migrations_plan", } ) def test_migrate_check_plan(self): out = io.StringIO() with self.assertRaises(SystemExit): call_command( "migrate", "migrations", "0001", check_unapplied=True, plan=True, stdout=out, no_color=True, ) self.assertEqual( "Planned operations:\n" "migrations.0001_initial\n" " Create model Salamander\n" " Raw Python operation -> Grow salamander tail.\n", out.getvalue(), ) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_showmigrations_list(self): """ showmigrations --list displays migrations and whether or not they're applied. """ out = io.StringIO() with mock.patch( "django.core.management.color.supports_color", lambda *args: True ): call_command( "showmigrations", format="list", stdout=out, verbosity=0, no_color=False ) self.assertEqual( "\x1b[1mmigrations\n\x1b[0m [ ] 0001_initial\n [ ] 0002_second\n", out.getvalue().lower(), ) call_command("migrate", "migrations", "0001", verbosity=0) out = io.StringIO() # Giving the explicit app_label tests for selective `show_list` in the command call_command( "showmigrations", "migrations", format="list", stdout=out, verbosity=0, no_color=True, ) self.assertEqual( "migrations\n [x] 0001_initial\n [ ] 0002_second\n", out.getvalue().lower() ) out = io.StringIO() # Applied datetimes are displayed at verbosity 2+. call_command( "showmigrations", "migrations", stdout=out, verbosity=2, no_color=True ) migration1 = MigrationRecorder(connection).migration_qs.get( app="migrations", name="0001_initial" ) self.assertEqual( "migrations\n" " [x] 0001_initial (applied at %s)\n" " [ ] 0002_second\n" % migration1.applied.strftime("%Y-%m-%d %H:%M:%S"), out.getvalue().lower(), ) # Cleanup by unmigrating everything call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_showmigrations_list_squashed(self): out = io.StringIO() call_command( "showmigrations", format="list", stdout=out, verbosity=2, no_color=True ) self.assertEqual( "migrations\n [ ] 0001_squashed_0002 (2 squashed migrations)\n", out.getvalue().lower(), ) out = io.StringIO() call_command( "migrate", "migrations", "0001_squashed_0002", stdout=out, verbosity=2, no_color=True, ) try: self.assertIn( "operations to perform:\n" " target specific migration: 0001_squashed_0002, from migrations\n" "running pre-migrate handlers for application migrations\n" "running migrations:\n" " applying migrations.0001_squashed_0002... ok (", out.getvalue().lower(), ) out = io.StringIO() call_command( "showmigrations", format="list", stdout=out, verbosity=2, no_color=True ) self.assertEqual( "migrations\n [x] 0001_squashed_0002 (2 squashed migrations)\n", out.getvalue().lower(), ) finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_run_before"} ) def test_showmigrations_plan(self): """ Tests --plan output of showmigrations command """ out = io.StringIO() call_command("showmigrations", format="plan", stdout=out) self.assertEqual( "[ ] migrations.0001_initial\n" "[ ] migrations.0003_third\n" "[ ] migrations.0002_second\n", out.getvalue().lower(), ) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out, verbosity=2) self.assertEqual( "[ ] migrations.0001_initial\n" "[ ] migrations.0003_third ... (migrations.0001_initial)\n" "[ ] migrations.0002_second ... (migrations.0001_initial, " "migrations.0003_third)\n", out.getvalue().lower(), ) call_command("migrate", "migrations", "0003", verbosity=0) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out) self.assertEqual( "[x] migrations.0001_initial\n" "[x] migrations.0003_third\n" "[ ] migrations.0002_second\n", out.getvalue().lower(), ) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out, verbosity=2) self.assertEqual( "[x] migrations.0001_initial\n" "[x] migrations.0003_third ... (migrations.0001_initial)\n" "[ ] migrations.0002_second ... (migrations.0001_initial, " "migrations.0003_third)\n", out.getvalue().lower(), ) # Cleanup by unmigrating everything call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_plan"} ) def test_migrate_plan(self): """Tests migrate --plan output.""" out = io.StringIO() # Show the plan up to the third migration. call_command( "migrate", "migrations", "0003", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n" "migrations.0001_initial\n" " Create model Salamander\n" " Raw Python operation -> Grow salamander tail.\n" "migrations.0002_second\n" " Create model Book\n" " Raw SQL operation -> ['SELECT * FROM migrations_book']\n" "migrations.0003_third\n" " Create model Author\n" " Raw SQL operation -> ['SELECT * FROM migrations_author']\n", out.getvalue(), ) try: # Migrate to the third migration. call_command("migrate", "migrations", "0003", verbosity=0) out = io.StringIO() # Show the plan for when there is nothing to apply. call_command( "migrate", "migrations", "0003", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n No planned migration operations.\n", out.getvalue(), ) out = io.StringIO() # Show the plan for reverse migration back to 0001. call_command( "migrate", "migrations", "0001", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n" "migrations.0003_third\n" " Undo Create model Author\n" " Raw SQL operation -> ['SELECT * FROM migrations_book']\n" "migrations.0002_second\n" " Undo Create model Book\n" " Raw SQL operation -> ['SELECT * FROM migrations_salamand…\n", out.getvalue(), ) out = io.StringIO() # Show the migration plan to fourth, with truncated details. call_command( "migrate", "migrations", "0004", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n" "migrations.0004_fourth\n" " Raw SQL operation -> SELECT * FROM migrations_author WHE…\n", out.getvalue(), ) # Show the plan when an operation is irreversible. # Migrate to the fourth migration. call_command("migrate", "migrations", "0004", verbosity=0) out = io.StringIO() call_command( "migrate", "migrations", "0003", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n" "migrations.0004_fourth\n" " Raw SQL operation -> IRREVERSIBLE\n", out.getvalue(), ) out = io.StringIO() call_command( "migrate", "migrations", "0005", plan=True, stdout=out, no_color=True ) # Operation is marked as irreversible only in the revert plan. self.assertEqual( "Planned operations:\n" "migrations.0005_fifth\n" " Raw Python operation\n" " Raw Python operation\n" " Raw Python operation -> Feed salamander.\n", out.getvalue(), ) call_command("migrate", "migrations", "0005", verbosity=0) out = io.StringIO() call_command( "migrate", "migrations", "0004", plan=True, stdout=out, no_color=True ) self.assertEqual( "Planned operations:\n" "migrations.0005_fifth\n" " Raw Python operation -> IRREVERSIBLE\n" " Raw Python operation -> IRREVERSIBLE\n" " Raw Python operation\n", out.getvalue(), ) finally: # Cleanup by unmigrating everything: fake the irreversible, then # migrate all to zero. call_command("migrate", "migrations", "0003", fake=True, verbosity=0) call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_empty"} ) def test_showmigrations_no_migrations(self): out = io.StringIO() call_command("showmigrations", stdout=out, no_color=True) self.assertEqual("migrations\n (no migrations)\n", out.getvalue().lower()) @override_settings( INSTALLED_APPS=["migrations.migrations_test_apps.unmigrated_app"] ) def test_showmigrations_unmigrated_app(self): out = io.StringIO() call_command("showmigrations", "unmigrated_app", stdout=out, no_color=True) try: self.assertEqual( "unmigrated_app\n (no migrations)\n", out.getvalue().lower() ) finally: # unmigrated_app.SillyModel has a foreign key to # 'migrations.Tribble', but that model is only defined in a # migration, so the global app registry never sees it and the # reference is left dangling. Remove it to avoid problems in # subsequent tests. apps._pending_operations.pop(("migrations", "tribble"), None) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_empty"} ) def test_showmigrations_plan_no_migrations(self): """ Tests --plan output of showmigrations command without migrations """ out = io.StringIO() call_command("showmigrations", format="plan", stdout=out, no_color=True) self.assertEqual("(no migrations)\n", out.getvalue().lower()) out = io.StringIO() call_command( "showmigrations", format="plan", stdout=out, verbosity=2, no_color=True ) self.assertEqual("(no migrations)\n", out.getvalue().lower()) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed_complex"} ) def test_showmigrations_plan_squashed(self): """ Tests --plan output of showmigrations command with squashed migrations. """ out = io.StringIO() call_command("showmigrations", format="plan", stdout=out) self.assertEqual( "[ ] migrations.1_auto\n" "[ ] migrations.2_auto\n" "[ ] migrations.3_squashed_5\n" "[ ] migrations.6_auto\n" "[ ] migrations.7_auto\n", out.getvalue().lower(), ) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out, verbosity=2) self.assertEqual( "[ ] migrations.1_auto\n" "[ ] migrations.2_auto ... (migrations.1_auto)\n" "[ ] migrations.3_squashed_5 ... (migrations.2_auto)\n" "[ ] migrations.6_auto ... (migrations.3_squashed_5)\n" "[ ] migrations.7_auto ... (migrations.6_auto)\n", out.getvalue().lower(), ) call_command("migrate", "migrations", "3_squashed_5", verbosity=0) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out) self.assertEqual( "[x] migrations.1_auto\n" "[x] migrations.2_auto\n" "[x] migrations.3_squashed_5\n" "[ ] migrations.6_auto\n" "[ ] migrations.7_auto\n", out.getvalue().lower(), ) out = io.StringIO() call_command("showmigrations", format="plan", stdout=out, verbosity=2) self.assertEqual( "[x] migrations.1_auto\n" "[x] migrations.2_auto ... (migrations.1_auto)\n" "[x] migrations.3_squashed_5 ... (migrations.2_auto)\n" "[ ] migrations.6_auto ... (migrations.3_squashed_5)\n" "[ ] migrations.7_auto ... (migrations.6_auto)\n", out.getvalue().lower(), ) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.mutate_state_b", "migrations.migrations_test_apps.alter_fk.author_app", "migrations.migrations_test_apps.alter_fk.book_app", ] ) def test_showmigrations_plan_single_app_label(self): """ `showmigrations --plan app_label` output with a single app_label. """ # Single app with no dependencies on other apps. out = io.StringIO() call_command("showmigrations", "mutate_state_b", format="plan", stdout=out) self.assertEqual( "[ ] mutate_state_b.0001_initial\n[ ] mutate_state_b.0002_add_field\n", out.getvalue(), ) # Single app with dependencies. out = io.StringIO() call_command("showmigrations", "author_app", format="plan", stdout=out) self.assertEqual( "[ ] author_app.0001_initial\n" "[ ] book_app.0001_initial\n" "[ ] author_app.0002_alter_id\n", out.getvalue(), ) # Some migrations already applied. call_command("migrate", "author_app", "0001", verbosity=0) out = io.StringIO() call_command("showmigrations", "author_app", format="plan", stdout=out) self.assertEqual( "[X] author_app.0001_initial\n" "[ ] book_app.0001_initial\n" "[ ] author_app.0002_alter_id\n", out.getvalue(), ) # Cleanup by unmigrating author_app. call_command("migrate", "author_app", "zero", verbosity=0) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.mutate_state_b", "migrations.migrations_test_apps.alter_fk.author_app", "migrations.migrations_test_apps.alter_fk.book_app", ] ) def test_showmigrations_plan_multiple_app_labels(self): """ `showmigrations --plan app_label` output with multiple app_labels. """ # Multiple apps: author_app depends on book_app; mutate_state_b doesn't # depend on other apps. out = io.StringIO() call_command( "showmigrations", "mutate_state_b", "author_app", format="plan", stdout=out ) self.assertEqual( "[ ] author_app.0001_initial\n" "[ ] book_app.0001_initial\n" "[ ] author_app.0002_alter_id\n" "[ ] mutate_state_b.0001_initial\n" "[ ] mutate_state_b.0002_add_field\n", out.getvalue(), ) # Multiple apps: args order shouldn't matter (the same result is # expected as above). out = io.StringIO() call_command( "showmigrations", "author_app", "mutate_state_b", format="plan", stdout=out ) self.assertEqual( "[ ] author_app.0001_initial\n" "[ ] book_app.0001_initial\n" "[ ] author_app.0002_alter_id\n" "[ ] mutate_state_b.0001_initial\n" "[ ] mutate_state_b.0002_add_field\n", out.getvalue(), ) @override_settings( INSTALLED_APPS=["migrations.migrations_test_apps.unmigrated_app"] ) def test_showmigrations_plan_app_label_no_migrations(self): out = io.StringIO() call_command( "showmigrations", "unmigrated_app", format="plan", stdout=out, no_color=True ) try: self.assertEqual("(no migrations)\n", out.getvalue()) finally: # unmigrated_app.SillyModel has a foreign key to # 'migrations.Tribble', but that model is only defined in a # migration, so the global app registry never sees it and the # reference is left dangling. Remove it to avoid problems in # subsequent tests. apps._pending_operations.pop(("migrations", "tribble"), None) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_sqlmigrate_forwards(self): """ sqlmigrate outputs forward looking SQL. """ out = io.StringIO() call_command("sqlmigrate", "migrations", "0001", stdout=out) lines = out.getvalue().splitlines() if connection.features.can_rollback_ddl: self.assertEqual(lines[0], connection.ops.start_transaction_sql()) self.assertEqual(lines[-1], connection.ops.end_transaction_sql()) lines = lines[1:-1] self.assertEqual( lines[:3], [ "--", "-- Create model Author", "--", ], ) self.assertIn( "create table %s" % connection.ops.quote_name("migrations_author").lower(), lines[3].lower(), ) pos = lines.index("--", 3) self.assertEqual( lines[pos : pos + 3], [ "--", "-- Create model Tribble", "--", ], ) self.assertIn( "create table %s" % connection.ops.quote_name("migrations_tribble").lower(), lines[pos + 3].lower(), ) pos = lines.index("--", pos + 3) self.assertEqual( lines[pos : pos + 3], [ "--", "-- Add field bool to tribble", "--", ], ) pos = lines.index("--", pos + 3) self.assertEqual( lines[pos : pos + 3], [ "--", "-- Alter unique_together for author (1 constraint(s))", "--", ], ) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_sqlmigrate_backwards(self): """ sqlmigrate outputs reverse looking SQL. """ # Cannot generate the reverse SQL unless we've applied the migration. call_command("migrate", "migrations", verbosity=0) out = io.StringIO() call_command("sqlmigrate", "migrations", "0001", stdout=out, backwards=True) lines = out.getvalue().splitlines() try: if connection.features.can_rollback_ddl: self.assertEqual(lines[0], connection.ops.start_transaction_sql()) self.assertEqual(lines[-1], connection.ops.end_transaction_sql()) lines = lines[1:-1] self.assertEqual( lines[:3], [ "--", "-- Alter unique_together for author (1 constraint(s))", "--", ], ) pos = lines.index("--", 3) self.assertEqual( lines[pos : pos + 3], [ "--", "-- Add field bool to tribble", "--", ], ) pos = lines.index("--", pos + 3) self.assertEqual( lines[pos : pos + 3], [ "--", "-- Create model Tribble", "--", ], ) next_pos = lines.index("--", pos + 3) drop_table_sql = ( "drop table %s" % connection.ops.quote_name("migrations_tribble").lower() ) for line in lines[pos + 3 : next_pos]: if drop_table_sql in line.lower(): break else: self.fail("DROP TABLE (tribble) not found.") pos = next_pos self.assertEqual( lines[pos : pos + 3], [ "--", "-- Create model Author", "--", ], ) drop_table_sql = ( "drop table %s" % connection.ops.quote_name("migrations_author").lower() ) for line in lines[pos + 3 :]: if drop_table_sql in line.lower(): break else: self.fail("DROP TABLE (author) not found.") finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_non_atomic"} ) def test_sqlmigrate_for_non_atomic_migration(self): """ Transaction wrappers aren't shown for non-atomic migrations. """ out = io.StringIO() call_command("sqlmigrate", "migrations", "0001", stdout=out) output = out.getvalue().lower() queries = [q.strip() for q in output.splitlines()] if connection.ops.start_transaction_sql(): self.assertNotIn(connection.ops.start_transaction_sql().lower(), queries) self.assertNotIn(connection.ops.end_transaction_sql().lower(), queries) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_sqlmigrate_for_non_transactional_databases(self): """ Transaction wrappers aren't shown for databases that don't support transactional DDL. """ out = io.StringIO() with mock.patch.object(connection.features, "can_rollback_ddl", False): call_command("sqlmigrate", "migrations", "0001", stdout=out) output = out.getvalue().lower() queries = [q.strip() for q in output.splitlines()] start_transaction_sql = connection.ops.start_transaction_sql() if start_transaction_sql: self.assertNotIn(start_transaction_sql.lower(), queries) self.assertNotIn(connection.ops.end_transaction_sql().lower(), queries) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_sqlmigrate_ambiguous_prefix_squashed_migrations(self): msg = ( "More than one migration matches '0001' in app 'migrations'. " "Please be more specific." ) with self.assertRaisesMessage(CommandError, msg): call_command("sqlmigrate", "migrations", "0001") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_sqlmigrate_squashed_migration(self): out = io.StringIO() call_command("sqlmigrate", "migrations", "0001_squashed_0002", stdout=out) output = out.getvalue().lower() self.assertIn("-- create model author", output) self.assertIn("-- create model book", output) self.assertNotIn("-- create model tribble", output) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_sqlmigrate_replaced_migration(self): out = io.StringIO() call_command("sqlmigrate", "migrations", "0001_initial", stdout=out) output = out.getvalue().lower() self.assertIn("-- create model author", output) self.assertIn("-- create model tribble", output) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_no_operations"} ) def test_sqlmigrate_no_operations(self): err = io.StringIO() call_command("sqlmigrate", "migrations", "0001_initial", stderr=err) self.assertEqual(err.getvalue(), "No operations found.\n") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_noop"} ) def test_sqlmigrate_noop(self): out = io.StringIO() call_command("sqlmigrate", "migrations", "0001", stdout=out) lines = out.getvalue().splitlines() if connection.features.can_rollback_ddl: lines = lines[1:-1] self.assertEqual( lines, [ "--", "-- Raw SQL operation", "--", "-- (no-op)", ], ) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_manual_porting"} ) def test_sqlmigrate_unrepresentable(self): out = io.StringIO() call_command("sqlmigrate", "migrations", "0002", stdout=out) lines = out.getvalue().splitlines() if connection.features.can_rollback_ddl: lines = lines[1:-1] self.assertEqual( lines, [ "--", "-- Raw Python operation", "--", "-- THIS OPERATION CANNOT BE WRITTEN AS SQL", ], ) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.migrated_app", "migrations.migrations_test_apps.migrated_unapplied_app", "migrations.migrations_test_apps.unmigrated_app", ], ) def test_regression_22823_unmigrated_fk_to_migrated_model(self): """ Assuming you have 3 apps, `A`, `B`, and `C`, such that: * `A` has migrations * `B` has a migration we want to apply * `C` has no migrations, but has an FK to `A` When we try to migrate "B", an exception occurs because the "B" was not included in the ProjectState that is used to detect soft-applied migrations (#22823). """ call_command("migrate", "migrated_unapplied_app", verbosity=0) # unmigrated_app.SillyModel has a foreign key to 'migrations.Tribble', # but that model is only defined in a migration, so the global app # registry never sees it and the reference is left dangling. Remove it # to avoid problems in subsequent tests. apps._pending_operations.pop(("migrations", "tribble"), None) @override_settings( INSTALLED_APPS=["migrations.migrations_test_apps.unmigrated_app_syncdb"] ) def test_migrate_syncdb_deferred_sql_executed_with_schemaeditor(self): """ For an app without migrations, editor.execute() is used for executing the syncdb deferred SQL. """ stdout = io.StringIO() with mock.patch.object(BaseDatabaseSchemaEditor, "execute") as execute: call_command( "migrate", run_syncdb=True, verbosity=1, stdout=stdout, no_color=True ) create_table_count = len( [call for call in execute.mock_calls if "CREATE TABLE" in str(call)] ) self.assertEqual(create_table_count, 2) # There's at least one deferred SQL for creating the foreign key # index. self.assertGreater(len(execute.mock_calls), 2) stdout = stdout.getvalue() self.assertIn("Synchronize unmigrated apps: unmigrated_app_syncdb", stdout) self.assertIn("Creating tables...", stdout) table_name = truncate_name( "unmigrated_app_syncdb_classroom", connection.ops.max_name_length() ) self.assertIn("Creating table %s" % table_name, stdout) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_migrate_syncdb_app_with_migrations(self): msg = "Can't use run_syncdb with app 'migrations' as it has migrations." with self.assertRaisesMessage(CommandError, msg): call_command("migrate", "migrations", run_syncdb=True, verbosity=0) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.unmigrated_app_syncdb", "migrations.migrations_test_apps.unmigrated_app_simple", ] ) def test_migrate_syncdb_app_label(self): """ Running migrate --run-syncdb with an app_label only creates tables for the specified app. """ stdout = io.StringIO() with mock.patch.object(BaseDatabaseSchemaEditor, "execute") as execute: call_command( "migrate", "unmigrated_app_syncdb", run_syncdb=True, stdout=stdout ) create_table_count = len( [call for call in execute.mock_calls if "CREATE TABLE" in str(call)] ) self.assertEqual(create_table_count, 2) self.assertGreater(len(execute.mock_calls), 2) self.assertIn( "Synchronize unmigrated app: unmigrated_app_syncdb", stdout.getvalue() ) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_migrate_record_replaced(self): """ Running a single squashed migration should record all of the original replaced migrations as run. """ recorder = MigrationRecorder(connection) out = io.StringIO() call_command("migrate", "migrations", verbosity=0) call_command("showmigrations", "migrations", stdout=out, no_color=True) self.assertEqual( "migrations\n [x] 0001_squashed_0002 (2 squashed migrations)\n", out.getvalue().lower(), ) applied_migrations = recorder.applied_migrations() self.assertIn(("migrations", "0001_initial"), applied_migrations) self.assertIn(("migrations", "0002_second"), applied_migrations) self.assertIn(("migrations", "0001_squashed_0002"), applied_migrations) # Rollback changes call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_migrate_record_squashed(self): """ Running migrate for a squashed migration should record as run if all of the replaced migrations have been run (#25231). """ recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0001_initial") recorder.record_applied("migrations", "0002_second") out = io.StringIO() call_command("showmigrations", "migrations", stdout=out, no_color=True) self.assertEqual( "migrations\n" " [-] 0001_squashed_0002 (2 squashed migrations) " "run 'manage.py migrate' to finish recording.\n", out.getvalue().lower(), ) out = io.StringIO() call_command("migrate", "migrations", verbosity=0) call_command("showmigrations", "migrations", stdout=out, no_color=True) self.assertEqual( "migrations\n [x] 0001_squashed_0002 (2 squashed migrations)\n", out.getvalue().lower(), ) self.assertIn( ("migrations", "0001_squashed_0002"), recorder.applied_migrations() ) # No changes were actually applied so there is nothing to rollback def test_migrate_partially_applied_squashed_migration(self): """ Migrating to a squashed migration specified by name should succeed even if it is partially applied. """ with self.temporary_migration_module(module="migrations.test_migrations"): recorder = MigrationRecorder(connection) try: call_command("migrate", "migrations", "0001_initial", verbosity=0) call_command( "squashmigrations", "migrations", "0002", interactive=False, verbosity=0, ) call_command( "migrate", "migrations", "0001_squashed_0002_second", verbosity=0, ) applied_migrations = recorder.applied_migrations() self.assertIn(("migrations", "0002_second"), applied_migrations) finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_migrate_backward_to_squashed_migration(self): try: call_command("migrate", "migrations", "0001_squashed_0002", verbosity=0) self.assertTableExists("migrations_author") self.assertTableExists("migrations_book") call_command("migrate", "migrations", "0001_initial", verbosity=0) self.assertTableExists("migrations_author") self.assertTableNotExists("migrations_book") finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_migrate_inconsistent_history(self): """ Running migrate with some migrations applied before their dependencies should not be allowed. """ recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0002_second") msg = ( "Migration migrations.0002_second is applied before its dependency " "migrations.0001_initial" ) with self.assertRaisesMessage(InconsistentMigrationHistory, msg): call_command("migrate") applied_migrations = recorder.applied_migrations() self.assertNotIn(("migrations", "0001_initial"), applied_migrations) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.migrated_unapplied_app", "migrations.migrations_test_apps.migrated_app", ] ) def test_migrate_not_reflected_changes(self): class NewModel1(models.Model): class Meta: app_label = "migrated_app" class NewModel2(models.Model): class Meta: app_label = "migrated_unapplied_app" out = io.StringIO() try: call_command("migrate", verbosity=0) call_command("migrate", stdout=out, no_color=True) self.assertEqual( "operations to perform:\n" " apply all migrations: migrated_app, migrated_unapplied_app\n" "running migrations:\n" " no migrations to apply.\n" " your models in app(s): 'migrated_app', " "'migrated_unapplied_app' have changes that are not yet " "reflected in a migration, and so won't be applied.\n" " run 'manage.py makemigrations' to make new migrations, and " "then re-run 'manage.py migrate' to apply them.\n", out.getvalue().lower(), ) finally: # Unmigrate everything. call_command("migrate", "migrated_app", "zero", verbosity=0) call_command("migrate", "migrated_unapplied_app", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_migrations_squashed_no_replaces", } ) def test_migrate_prune(self): """ With prune=True, references to migration files deleted from the migrations module (such as after being squashed) are removed from the django_migrations table. """ recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0001_initial") recorder.record_applied("migrations", "0002_second") recorder.record_applied("migrations", "0001_squashed_0002") out = io.StringIO() try: call_command("migrate", "migrations", prune=True, stdout=out, no_color=True) self.assertEqual( out.getvalue(), "Pruning migrations:\n" " Pruning migrations.0001_initial OK\n" " Pruning migrations.0002_second OK\n", ) applied_migrations = [ migration for migration in recorder.applied_migrations() if migration[0] == "migrations" ] self.assertEqual(applied_migrations, [("migrations", "0001_squashed_0002")]) finally: recorder.record_unapplied("migrations", "0001_initial") recorder.record_unapplied("migrations", "0001_second") recorder.record_unapplied("migrations", "0001_squashed_0002") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_prune_deleted_squashed_migrations_in_replaces(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_squashed" ) as migration_dir: try: call_command("migrate", "migrations", verbosity=0) # Delete the replaced migrations. os.remove(os.path.join(migration_dir, "0001_initial.py")) os.remove(os.path.join(migration_dir, "0002_second.py")) # --prune cannot be used before removing the "replaces" # attribute. call_command( "migrate", "migrations", prune=True, stdout=out, no_color=True, ) self.assertEqual( out.getvalue(), "Pruning migrations:\n" " Cannot use --prune because the following squashed " "migrations have their 'replaces' attributes and may not " "be recorded as applied:\n" " migrations.0001_squashed_0002\n" " Re-run 'manage.py migrate' if they are not marked as " "applied, and remove 'replaces' attributes in their " "Migration classes.\n", ) finally: # Unmigrate everything. call_command("migrate", "migrations", "zero", verbosity=0) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"} ) def test_prune_no_migrations_to_prune(self): out = io.StringIO() call_command("migrate", "migrations", prune=True, stdout=out, no_color=True) self.assertEqual( out.getvalue(), "Pruning migrations:\n No migrations to prune.\n", ) out = io.StringIO() call_command( "migrate", "migrations", prune=True, stdout=out, no_color=True, verbosity=0, ) self.assertEqual(out.getvalue(), "") def test_prune_no_app_label(self): msg = "Migrations can be pruned only when an app is specified." with self.assertRaisesMessage(CommandError, msg): call_command("migrate", prune=True) @override_settings( MIGRATION_MODULES={ "migrations": "migrations.test_migrations_squashed_no_replaces", "migrations2": "migrations2.test_migrations_2_squashed_with_replaces", }, INSTALLED_APPS=["migrations", "migrations2"], ) def test_prune_respect_app_label(self): recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0001_initial") recorder.record_applied("migrations", "0002_second") recorder.record_applied("migrations", "0001_squashed_0002") # Second app has squashed migrations with replaces. recorder.record_applied("migrations2", "0001_initial") recorder.record_applied("migrations2", "0002_second") recorder.record_applied("migrations2", "0001_squashed_0002") out = io.StringIO() try: call_command("migrate", "migrations", prune=True, stdout=out, no_color=True) self.assertEqual( out.getvalue(), "Pruning migrations:\n" " Pruning migrations.0001_initial OK\n" " Pruning migrations.0002_second OK\n", ) applied_migrations = [ migration for migration in recorder.applied_migrations() if migration[0] in ["migrations", "migrations2"] ] self.assertEqual( applied_migrations, [ ("migrations", "0001_squashed_0002"), ("migrations2", "0001_initial"), ("migrations2", "0002_second"), ("migrations2", "0001_squashed_0002"), ], ) finally: recorder.record_unapplied("migrations", "0001_initial") recorder.record_unapplied("migrations", "0001_second") recorder.record_unapplied("migrations", "0001_squashed_0002") recorder.record_unapplied("migrations2", "0001_initial") recorder.record_unapplied("migrations2", "0002_second") recorder.record_unapplied("migrations2", "0001_squashed_0002") class MakeMigrationsTests(MigrationTestBase): """ Tests running the makemigrations command. """ def setUp(self): super().setUp() self._old_models = apps.app_configs["migrations"].models.copy() def tearDown(self): apps.app_configs["migrations"].models = self._old_models apps.all_models["migrations"] = self._old_models apps.clear_cache() super().tearDown() def test_files_content(self): self.assertTableNotExists("migrations_unicodemodel") apps.register_model("migrations", UnicodeModel) with self.temporary_migration_module() as migration_dir: call_command("makemigrations", "migrations", verbosity=0) # Check for empty __init__.py file in migrations folder init_file = os.path.join(migration_dir, "__init__.py") self.assertTrue(os.path.exists(init_file)) with open(init_file) as fp: content = fp.read() self.assertEqual(content, "") # Check for existing 0001_initial.py file in migration folder initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_file)) with open(initial_file, encoding="utf-8") as fp: content = fp.read() self.assertIn("migrations.CreateModel", content) self.assertIn("initial = True", content) self.assertIn("úñí©óðé µóðéø", content) # Meta.verbose_name self.assertIn("úñí©óðé µóðéøß", content) # Meta.verbose_name_plural self.assertIn("ÚÑÍ¢ÓÐÉ", content) # title.verbose_name self.assertIn("“Ðjáñgó”", content) # title.default def test_makemigrations_order(self): """ makemigrations should recognize number-only migrations (0001.py). """ module = "migrations.test_migrations_order" with self.temporary_migration_module(module=module) as migration_dir: if hasattr(importlib, "invalidate_caches"): # importlib caches os.listdir() on some platforms like macOS # (#23850). importlib.invalidate_caches() call_command( "makemigrations", "migrations", "--empty", "-n", "a", "-v", "0" ) self.assertTrue(os.path.exists(os.path.join(migration_dir, "0002_a.py"))) def test_makemigrations_empty_connections(self): empty_connections = ConnectionHandler({"default": {}}) with mock.patch( "django.core.management.commands.makemigrations.connections", new=empty_connections, ): # with no apps out = io.StringIO() call_command("makemigrations", stdout=out) self.assertIn("No changes detected", out.getvalue()) # with an app with self.temporary_migration_module() as migration_dir: call_command("makemigrations", "migrations", verbosity=0) init_file = os.path.join(migration_dir, "__init__.py") self.assertTrue(os.path.exists(init_file)) @override_settings(INSTALLED_APPS=["migrations", "migrations2"]) def test_makemigrations_consistency_checks_respect_routers(self): """ The history consistency checks in makemigrations respect settings.DATABASE_ROUTERS. """ def patched_has_table(migration_recorder): if migration_recorder.connection is connections["other"]: raise Exception("Other connection") else: return mock.DEFAULT self.assertTableNotExists("migrations_unicodemodel") apps.register_model("migrations", UnicodeModel) with mock.patch.object( MigrationRecorder, "has_table", autospec=True, side_effect=patched_has_table ) as has_table: with self.temporary_migration_module() as migration_dir: call_command("makemigrations", "migrations", verbosity=0) initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_file)) self.assertEqual(has_table.call_count, 1) # 'default' is checked # Router says not to migrate 'other' so consistency shouldn't # be checked. with self.settings(DATABASE_ROUTERS=["migrations.routers.TestRouter"]): call_command("makemigrations", "migrations", verbosity=0) self.assertEqual(has_table.call_count, 2) # 'default' again # With a router that doesn't prohibit migrating 'other', # consistency is checked. with self.settings( DATABASE_ROUTERS=["migrations.routers.DefaultOtherRouter"] ): with self.assertRaisesMessage(Exception, "Other connection"): call_command("makemigrations", "migrations", verbosity=0) self.assertEqual(has_table.call_count, 4) # 'default' and 'other' # With a router that doesn't allow migrating on any database, # no consistency checks are made. with self.settings(DATABASE_ROUTERS=["migrations.routers.TestRouter"]): with mock.patch.object( TestRouter, "allow_migrate", return_value=False ) as allow_migrate: call_command("makemigrations", "migrations", verbosity=0) allow_migrate.assert_any_call( "other", "migrations", model_name="UnicodeModel" ) # allow_migrate() is called with the correct arguments. self.assertGreater(len(allow_migrate.mock_calls), 0) called_aliases = set() for mock_call in allow_migrate.mock_calls: _, call_args, call_kwargs = mock_call connection_alias, app_name = call_args called_aliases.add(connection_alias) # Raises an error if invalid app_name/model_name occurs. apps.get_app_config(app_name).get_model(call_kwargs["model_name"]) self.assertEqual(called_aliases, set(connections)) self.assertEqual(has_table.call_count, 4) def test_failing_migration(self): # If a migration fails to serialize, it shouldn't generate an empty file. #21280 apps.register_model("migrations", UnserializableModel) with self.temporary_migration_module() as migration_dir: with self.assertRaisesMessage(ValueError, "Cannot serialize"): call_command("makemigrations", "migrations", verbosity=0) initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertFalse(os.path.exists(initial_file)) def test_makemigrations_conflict_exit(self): """ makemigrations exits if it detects a conflict. """ with self.temporary_migration_module( module="migrations.test_migrations_conflict" ): with self.assertRaises(CommandError) as context: call_command("makemigrations") self.assertEqual( str(context.exception), "Conflicting migrations detected; multiple leaf nodes in the " "migration graph: (0002_conflicting_second, 0002_second in " "migrations).\n" "To fix them run 'python manage.py makemigrations --merge'", ) def test_makemigrations_merge_no_conflict(self): """ makemigrations exits if in merge mode with no conflicts. """ out = io.StringIO() with self.temporary_migration_module(module="migrations.test_migrations"): call_command("makemigrations", merge=True, stdout=out) self.assertIn("No conflicts detected to merge.", out.getvalue()) def test_makemigrations_empty_no_app_specified(self): """ makemigrations exits if no app is specified with 'empty' mode. """ msg = "You must supply at least one app label when using --empty." with self.assertRaisesMessage(CommandError, msg): call_command("makemigrations", empty=True) def test_makemigrations_empty_migration(self): """ makemigrations properly constructs an empty migration. """ with self.temporary_migration_module() as migration_dir: call_command("makemigrations", "migrations", empty=True, verbosity=0) # Check for existing 0001_initial.py file in migration folder initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_file)) with open(initial_file, encoding="utf-8") as fp: content = fp.read() # Remove all whitespace to check for empty dependencies and operations content = content.replace(" ", "") self.assertIn( "dependencies=[]" if HAS_BLACK else "dependencies=[\n]", content ) self.assertIn( "operations=[]" if HAS_BLACK else "operations=[\n]", content ) @override_settings(MIGRATION_MODULES={"migrations": None}) def test_makemigrations_disabled_migrations_for_app(self): """ makemigrations raises a nice error when migrations are disabled for an app. """ msg = ( "Django can't create migrations for app 'migrations' because migrations " "have been disabled via the MIGRATION_MODULES setting." ) with self.assertRaisesMessage(ValueError, msg): call_command("makemigrations", "migrations", empty=True, verbosity=0) def test_makemigrations_no_changes_no_apps(self): """ makemigrations exits when there are no changes and no apps are specified. """ out = io.StringIO() call_command("makemigrations", stdout=out) self.assertIn("No changes detected", out.getvalue()) def test_makemigrations_no_changes(self): """ makemigrations exits when there are no changes to an app. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_changes" ): call_command("makemigrations", "migrations", stdout=out) self.assertIn("No changes detected in app 'migrations'", out.getvalue()) def test_makemigrations_no_apps_initial(self): """ makemigrations should detect initial is needed on empty migration modules if no app provided. """ out = io.StringIO() with self.temporary_migration_module(module="migrations.test_migrations_empty"): call_command("makemigrations", stdout=out) self.assertIn("0001_initial.py", out.getvalue()) def test_makemigrations_no_init(self): """Migration directories without an __init__.py file are allowed.""" out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_init" ): call_command("makemigrations", stdout=out) self.assertIn("0001_initial.py", out.getvalue()) def test_makemigrations_no_init_ambiguous(self): """ Migration directories without an __init__.py file are not allowed if there are multiple namespace search paths that resolve to them. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_init" ) as migration_dir: # Copy the project directory into another place under sys.path. app_dir = Path(migration_dir).parent os.remove(app_dir / "__init__.py") project_dir = app_dir.parent dest = project_dir.parent / "other_dir_in_path" shutil.copytree(project_dir, dest) with extend_sys_path(str(dest)): call_command("makemigrations", stdout=out) self.assertEqual("No changes detected\n", out.getvalue()) def test_makemigrations_migrations_announce(self): """ makemigrations announces the migration at the default verbosity level. """ out = io.StringIO() with self.temporary_migration_module(): call_command("makemigrations", "migrations", stdout=out) self.assertIn("Migrations for 'migrations'", out.getvalue()) def test_makemigrations_no_common_ancestor(self): """ makemigrations fails to merge migrations with no common ancestor. """ with self.assertRaises(ValueError) as context: with self.temporary_migration_module( module="migrations.test_migrations_no_ancestor" ): call_command("makemigrations", "migrations", merge=True) exception_message = str(context.exception) self.assertIn("Could not find common ancestor of", exception_message) self.assertIn("0002_second", exception_message) self.assertIn("0002_conflicting_second", exception_message) def test_makemigrations_interactive_reject(self): """ makemigrations enters and exits interactive mode properly. """ # Monkeypatch interactive questioner to auto reject with mock.patch("builtins.input", mock.Mock(return_value="N")): with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: with captured_stdout(): call_command( "makemigrations", "migrations", name="merge", merge=True, interactive=True, verbosity=0, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertFalse(os.path.exists(merge_file)) def test_makemigrations_interactive_accept(self): """ makemigrations enters interactive mode and merges properly. """ # Monkeypatch interactive questioner to auto accept with mock.patch("builtins.input", mock.Mock(return_value="y")): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", name="merge", merge=True, interactive=True, stdout=out, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertTrue(os.path.exists(merge_file)) self.assertIn("Created new merge migration", out.getvalue()) def test_makemigrations_default_merge_name(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", merge=True, interactive=False, stdout=out, ) merge_file = os.path.join( migration_dir, "0003_merge_0002_conflicting_second_0002_second.py", ) self.assertIs(os.path.exists(merge_file), True) with open(merge_file, encoding="utf-8") as fp: content = fp.read() if HAS_BLACK: target_str = '("migrations", "0002_conflicting_second")' else: target_str = "('migrations', '0002_conflicting_second')" self.assertIn(target_str, content) self.assertIn("Created new merge migration %s" % merge_file, out.getvalue()) @mock.patch("django.db.migrations.utils.datetime") def test_makemigrations_auto_merge_name(self, mock_datetime): mock_datetime.datetime.now.return_value = datetime.datetime(2016, 1, 2, 3, 4) with mock.patch("builtins.input", mock.Mock(return_value="y")): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict_long_name" ) as migration_dir: call_command( "makemigrations", "migrations", merge=True, interactive=True, stdout=out, ) merge_file = os.path.join(migration_dir, "0003_merge_20160102_0304.py") self.assertTrue(os.path.exists(merge_file)) self.assertIn("Created new merge migration", out.getvalue()) def test_makemigrations_non_interactive_not_null_addition(self): """ Non-interactive makemigrations fails when a default is missing on a new not-null field. """ class SillyModel(models.Model): silly_field = models.BooleanField(default=False) silly_int = models.IntegerField() class Meta: app_label = "migrations" with self.assertRaises(SystemExit): with self.temporary_migration_module( module="migrations.test_migrations_no_default" ): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=False) self.assertIn( "Field 'silly_int' on model 'sillymodel' not migrated: it is " "impossible to add a non-nullable field without specifying a " "default.", out.getvalue(), ) def test_makemigrations_interactive_not_null_addition(self): """ makemigrations messages when adding a NOT NULL field in interactive mode. """ class Author(models.Model): silly_field = models.BooleanField(null=False) class Meta: app_label = "migrations" input_msg = ( "It is impossible to add a non-nullable field 'silly_field' to " "author without specifying a default. This is because the " "database needs something to populate existing rows.\n" "Please select a fix:\n" " 1) Provide a one-off default now (will be set on all existing " "rows with a null value for this column)\n" " 2) Quit and manually define a default value in models.py." ) with self.temporary_migration_module(module="migrations.test_migrations"): # 2 - quit. with mock.patch("builtins.input", return_value="2"): with captured_stdout() as out, self.assertRaises(SystemExit): call_command("makemigrations", "migrations", interactive=True) self.assertIn(input_msg, out.getvalue()) # 1 - provide a default. with mock.patch("builtins.input", return_value="1"): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=True) output = out.getvalue() self.assertIn(input_msg, output) self.assertIn("Please enter the default value as valid Python.", output) self.assertIn( "The datetime and django.utils.timezone modules are " "available, so it is possible to provide e.g. timezone.now as " "a value", output, ) self.assertIn("Type 'exit' to exit this prompt", output) def test_makemigrations_non_interactive_not_null_alteration(self): """ Non-interactive makemigrations fails when a default is missing on a field changed to not-null. """ class Author(models.Model): name = models.CharField(max_length=255) slug = models.SlugField() age = models.IntegerField(default=0) class Meta: app_label = "migrations" with self.temporary_migration_module(module="migrations.test_migrations"): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=False) self.assertIn("Alter field slug on author", out.getvalue()) self.assertIn( "Field 'slug' on model 'author' given a default of NOT PROVIDED " "and must be corrected.", out.getvalue(), ) def test_makemigrations_interactive_not_null_alteration(self): """ makemigrations messages when changing a NULL field to NOT NULL in interactive mode. """ class Author(models.Model): slug = models.SlugField(null=False) class Meta: app_label = "migrations" input_msg = ( "It is impossible to change a nullable field 'slug' on author to " "non-nullable without providing a default. This is because the " "database needs something to populate existing rows.\n" "Please select a fix:\n" " 1) Provide a one-off default now (will be set on all existing " "rows with a null value for this column)\n" " 2) Ignore for now. Existing rows that contain NULL values will " "have to be handled manually, for example with a RunPython or " "RunSQL operation.\n" " 3) Quit and manually define a default value in models.py." ) with self.temporary_migration_module(module="migrations.test_migrations"): # No message appears if --dry-run. with captured_stdout() as out: call_command( "makemigrations", "migrations", interactive=True, dry_run=True, ) self.assertNotIn(input_msg, out.getvalue()) # 3 - quit. with mock.patch("builtins.input", return_value="3"): with captured_stdout() as out, self.assertRaises(SystemExit): call_command("makemigrations", "migrations", interactive=True) self.assertIn(input_msg, out.getvalue()) # 1 - provide a default. with mock.patch("builtins.input", return_value="1"): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=True) output = out.getvalue() self.assertIn(input_msg, output) self.assertIn("Please enter the default value as valid Python.", output) self.assertIn( "The datetime and django.utils.timezone modules are " "available, so it is possible to provide e.g. timezone.now as " "a value", output, ) self.assertIn("Type 'exit' to exit this prompt", output) def test_makemigrations_non_interactive_no_model_rename(self): """ makemigrations adds and removes a possible model rename in non-interactive mode. """ class RenamedModel(models.Model): silly_field = models.BooleanField(default=False) class Meta: app_label = "migrations" out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_default" ): call_command("makemigrations", "migrations", interactive=False, stdout=out) self.assertIn("Delete model SillyModel", out.getvalue()) self.assertIn("Create model RenamedModel", out.getvalue()) def test_makemigrations_non_interactive_no_field_rename(self): """ makemigrations adds and removes a possible field rename in non-interactive mode. """ class SillyModel(models.Model): silly_rename = models.BooleanField(default=False) class Meta: app_label = "migrations" out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_default" ): call_command("makemigrations", "migrations", interactive=False, stdout=out) self.assertIn("Remove field silly_field from sillymodel", out.getvalue()) self.assertIn("Add field silly_rename to sillymodel", out.getvalue()) @mock.patch("builtins.input", return_value="Y") def test_makemigrations_model_rename_interactive(self, mock_input): class RenamedModel(models.Model): silly_field = models.BooleanField(default=False) class Meta: app_label = "migrations" with self.temporary_migration_module( module="migrations.test_migrations_no_default", ): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=True) self.assertIn("Rename model SillyModel to RenamedModel", out.getvalue()) @mock.patch("builtins.input", return_value="Y") def test_makemigrations_field_rename_interactive(self, mock_input): class SillyModel(models.Model): silly_rename = models.BooleanField(default=False) class Meta: app_label = "migrations" with self.temporary_migration_module( module="migrations.test_migrations_no_default", ): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=True) self.assertIn( "Rename field silly_field on sillymodel to silly_rename", out.getvalue(), ) def test_makemigrations_handle_merge(self): """ makemigrations properly merges the conflicting migrations with --noinput. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", name="merge", merge=True, interactive=False, stdout=out, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertTrue(os.path.exists(merge_file)) output = out.getvalue() self.assertIn("Merging migrations", output) self.assertIn("Branch 0002_second", output) self.assertIn("Branch 0002_conflicting_second", output) self.assertIn("Created new merge migration", output) def test_makemigration_merge_dry_run(self): """ makemigrations respects --dry-run option when fixing migration conflicts (#24427). """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", name="merge", dry_run=True, merge=True, interactive=False, stdout=out, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertFalse(os.path.exists(merge_file)) output = out.getvalue() self.assertIn("Merging migrations", output) self.assertIn("Branch 0002_second", output) self.assertIn("Branch 0002_conflicting_second", output) self.assertNotIn("Created new merge migration", output) def test_makemigration_merge_dry_run_verbosity_3(self): """ `makemigrations --merge --dry-run` writes the merge migration file to stdout with `verbosity == 3` (#24427). """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", name="merge", dry_run=True, merge=True, interactive=False, stdout=out, verbosity=3, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertFalse(os.path.exists(merge_file)) output = out.getvalue() self.assertIn("Merging migrations", output) self.assertIn("Branch 0002_second", output) self.assertIn("Branch 0002_conflicting_second", output) self.assertNotIn("Created new merge migration", output) # Additional output caused by verbosity 3 # The complete merge migration file that would be written self.assertIn("class Migration(migrations.Migration):", output) self.assertIn("dependencies = [", output) self.assertIn("('migrations', '0002_second')", output) self.assertIn("('migrations', '0002_conflicting_second')", output) self.assertIn("operations = [", output) self.assertIn("]", output) def test_makemigrations_dry_run(self): """ `makemigrations --dry-run` should not ask for defaults. """ class SillyModel(models.Model): silly_field = models.BooleanField(default=False) silly_date = models.DateField() # Added field without a default silly_auto_now = models.DateTimeField(auto_now_add=True) class Meta: app_label = "migrations" out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_default" ): call_command("makemigrations", "migrations", dry_run=True, stdout=out) # Output the expected changes directly, without asking for defaults self.assertIn("Add field silly_date to sillymodel", out.getvalue()) def test_makemigrations_dry_run_verbosity_3(self): """ Allow `makemigrations --dry-run` to output the migrations file to stdout (with verbosity == 3). """ class SillyModel(models.Model): silly_field = models.BooleanField(default=False) silly_char = models.CharField(default="") class Meta: app_label = "migrations" out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_default" ): call_command( "makemigrations", "migrations", dry_run=True, stdout=out, verbosity=3 ) # Normal --dry-run output self.assertIn("+ Add field silly_char to sillymodel", out.getvalue()) # Additional output caused by verbosity 3 # The complete migrations file that would be written self.assertIn("class Migration(migrations.Migration):", out.getvalue()) self.assertIn("dependencies = [", out.getvalue()) self.assertIn("('migrations', '0001_initial'),", out.getvalue()) self.assertIn("migrations.AddField(", out.getvalue()) self.assertIn("model_name='sillymodel',", out.getvalue()) self.assertIn("name='silly_char',", out.getvalue()) def test_makemigrations_scriptable(self): """ With scriptable=True, log output is diverted to stderr, and only the paths of generated migration files are written to stdout. """ out = io.StringIO() err = io.StringIO() with self.temporary_migration_module( module="migrations.migrations.test_migrations", ) as migration_dir: call_command( "makemigrations", "migrations", scriptable=True, stdout=out, stderr=err, ) initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertEqual(out.getvalue(), f"{initial_file}\n") self.assertIn(" + Create model ModelWithCustomBase\n", err.getvalue()) @mock.patch("builtins.input", return_value="Y") def test_makemigrations_scriptable_merge(self, mock_input): out = io.StringIO() err = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_conflict", ) as migration_dir: call_command( "makemigrations", "migrations", merge=True, name="merge", scriptable=True, stdout=out, stderr=err, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertEqual(out.getvalue(), f"{merge_file}\n") self.assertIn(f"Created new merge migration {merge_file}", err.getvalue()) def test_makemigrations_failure_to_format_code(self): self.assertFormatterFailureCaught("makemigrations", "migrations") def test_merge_makemigrations_failure_to_format_code(self): self.assertFormatterFailureCaught("makemigrations", "migrations", empty=True) self.assertFormatterFailureCaught( "makemigrations", "migrations", merge=True, interactive=False, module="migrations.test_migrations_conflict", ) def test_makemigrations_migrations_modules_path_not_exist(self): """ makemigrations creates migrations when specifying a custom location for migration files using MIGRATION_MODULES if the custom path doesn't already exist. """ class SillyModel(models.Model): silly_field = models.BooleanField(default=False) class Meta: app_label = "migrations" out = io.StringIO() migration_module = "migrations.test_migrations_path_doesnt_exist.foo.bar" with self.temporary_migration_module(module=migration_module) as migration_dir: call_command("makemigrations", "migrations", stdout=out) # Migrations file is actually created in the expected path. initial_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_file)) # Command output indicates the migration is created. self.assertIn(" + Create model SillyModel", out.getvalue()) @override_settings(MIGRATION_MODULES={"migrations": "some.nonexistent.path"}) def test_makemigrations_migrations_modules_nonexistent_toplevel_package(self): msg = ( "Could not locate an appropriate location to create migrations " "package some.nonexistent.path. Make sure the toplevel package " "exists and can be imported." ) with self.assertRaisesMessage(ValueError, msg): call_command("makemigrations", "migrations", empty=True, verbosity=0) def test_makemigrations_interactive_by_default(self): """ The user is prompted to merge by default if there are conflicts and merge is True. Answer negative to differentiate it from behavior when --noinput is specified. """ # Monkeypatch interactive questioner to auto reject out = io.StringIO() with mock.patch("builtins.input", mock.Mock(return_value="N")): with self.temporary_migration_module( module="migrations.test_migrations_conflict" ) as migration_dir: call_command( "makemigrations", "migrations", name="merge", merge=True, stdout=out ) merge_file = os.path.join(migration_dir, "0003_merge.py") # This will fail if interactive is False by default self.assertFalse(os.path.exists(merge_file)) self.assertNotIn("Created new merge migration", out.getvalue()) @override_settings( INSTALLED_APPS=[ "migrations", "migrations.migrations_test_apps.unspecified_app_with_conflict", ] ) def test_makemigrations_unspecified_app_with_conflict_no_merge(self): """ makemigrations does not raise a CommandError when an unspecified app has conflicting migrations. """ with self.temporary_migration_module( module="migrations.test_migrations_no_changes" ): call_command("makemigrations", "migrations", merge=False, verbosity=0) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.migrated_app", "migrations.migrations_test_apps.unspecified_app_with_conflict", ] ) def test_makemigrations_unspecified_app_with_conflict_merge(self): """ makemigrations does not create a merge for an unspecified app even if it has conflicting migrations. """ # Monkeypatch interactive questioner to auto accept with mock.patch("builtins.input", mock.Mock(return_value="y")): out = io.StringIO() with self.temporary_migration_module( app_label="migrated_app" ) as migration_dir: call_command( "makemigrations", "migrated_app", name="merge", merge=True, interactive=True, stdout=out, ) merge_file = os.path.join(migration_dir, "0003_merge.py") self.assertFalse(os.path.exists(merge_file)) self.assertIn("No conflicts detected to merge.", out.getvalue()) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.migrated_app", "migrations.migrations_test_apps.conflicting_app_with_dependencies", ] ) def test_makemigrations_merge_dont_output_dependency_operations(self): """ makemigrations --merge does not output any operations from apps that don't belong to a given app. """ # Monkeypatch interactive questioner to auto accept with mock.patch("builtins.input", mock.Mock(return_value="N")): out = io.StringIO() with mock.patch( "django.core.management.color.supports_color", lambda *args: False ): call_command( "makemigrations", "conflicting_app_with_dependencies", merge=True, interactive=True, stdout=out, ) self.assertEqual( out.getvalue().lower(), "merging conflicting_app_with_dependencies\n" " branch 0002_conflicting_second\n" " + create model something\n" " branch 0002_second\n" " - delete model tribble\n" " - remove field silly_field from author\n" " + add field rating to author\n" " + create model book\n" "\n" "merging will only work if the operations printed above do not " "conflict\n" "with each other (working on different fields or models)\n" "should these migration branches be merged? [y/n] ", ) def test_makemigrations_with_custom_name(self): """ makemigrations --name generate a custom migration name. """ with self.temporary_migration_module() as migration_dir: def cmd(migration_count, migration_name, *args): call_command( "makemigrations", "migrations", "--verbosity", "0", "--name", migration_name, *args, ) migration_file = os.path.join( migration_dir, "%s_%s.py" % (migration_count, migration_name) ) # Check for existing migration file in migration folder self.assertTrue(os.path.exists(migration_file)) with open(migration_file, encoding="utf-8") as fp: content = fp.read() content = content.replace(" ", "") return content # generate an initial migration migration_name_0001 = "my_initial_migration" content = cmd("0001", migration_name_0001) self.assertIn( "dependencies=[]" if HAS_BLACK else "dependencies=[\n]", content ) # importlib caches os.listdir() on some platforms like macOS # (#23850). if hasattr(importlib, "invalidate_caches"): importlib.invalidate_caches() # generate an empty migration migration_name_0002 = "my_custom_migration" content = cmd("0002", migration_name_0002, "--empty") if HAS_BLACK: template_str = 'dependencies=[\n("migrations","0001_%s"),\n]' else: template_str = "dependencies=[\n('migrations','0001_%s'),\n]" self.assertIn( template_str % migration_name_0001, content, ) self.assertIn("operations=[]" if HAS_BLACK else "operations=[\n]", content) def test_makemigrations_with_invalid_custom_name(self): msg = "The migration name must be a valid Python identifier." with self.assertRaisesMessage(CommandError, msg): call_command( "makemigrations", "migrations", "--name", "invalid name", "--empty" ) def test_makemigrations_check_with_changes(self): """ makemigrations --check should exit with a non-zero status when there are changes to an app requiring migrations. """ out = io.StringIO() with self.temporary_migration_module() as tmpdir: with self.assertRaises(SystemExit) as cm: call_command( "makemigrations", "--check", "migrations", stdout=out, ) self.assertEqual(os.listdir(tmpdir), ["__init__.py"]) self.assertEqual(cm.exception.code, 1) self.assertIn("Migrations for 'migrations':", out.getvalue()) def test_makemigrations_check_no_changes(self): """ makemigrations --check should exit with a zero status when there are no changes. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_changes" ): call_command("makemigrations", "--check", "migrations", stdout=out) self.assertEqual("No changes detected in app 'migrations'\n", out.getvalue()) def test_makemigrations_migration_path_output(self): """ makemigrations should print the relative paths to the migrations unless they are outside of the current tree, in which case the absolute path should be shown. """ out = io.StringIO() apps.register_model("migrations", UnicodeModel) with self.temporary_migration_module() as migration_dir: call_command("makemigrations", "migrations", stdout=out) self.assertIn( os.path.join(migration_dir, "0001_initial.py"), out.getvalue() ) def test_makemigrations_migration_path_output_valueerror(self): """ makemigrations prints the absolute path if os.path.relpath() raises a ValueError when it's impossible to obtain a relative path, e.g. on Windows if Django is installed on a different drive than where the migration files are created. """ out = io.StringIO() with self.temporary_migration_module() as migration_dir: with mock.patch("os.path.relpath", side_effect=ValueError): call_command("makemigrations", "migrations", stdout=out) self.assertIn(os.path.join(migration_dir, "0001_initial.py"), out.getvalue()) def test_makemigrations_inconsistent_history(self): """ makemigrations should raise InconsistentMigrationHistory exception if there are some migrations applied before their dependencies. """ recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0002_second") msg = ( "Migration migrations.0002_second is applied before its dependency " "migrations.0001_initial" ) with self.temporary_migration_module(module="migrations.test_migrations"): with self.assertRaisesMessage(InconsistentMigrationHistory, msg): call_command("makemigrations") def test_makemigrations_inconsistent_history_db_failure(self): msg = ( "Got an error checking a consistent migration history performed " "for database connection 'default': could not connect to server" ) with mock.patch( "django.db.migrations.loader.MigrationLoader.check_consistent_history", side_effect=OperationalError("could not connect to server"), ): with self.temporary_migration_module(): with self.assertWarns(RuntimeWarning) as cm: call_command("makemigrations", verbosity=0) self.assertEqual(str(cm.warning), msg) @mock.patch("builtins.input", return_value="1") @mock.patch( "django.db.migrations.questioner.sys.stdin", mock.MagicMock(encoding=sys.getdefaultencoding()), ) def test_makemigrations_auto_now_add_interactive(self, *args): """ makemigrations prompts the user when adding auto_now_add to an existing model. """ class Entry(models.Model): title = models.CharField(max_length=255) creation_date = models.DateTimeField(auto_now_add=True) class Meta: app_label = "migrations" input_msg = ( "It is impossible to add the field 'creation_date' with " "'auto_now_add=True' to entry without providing a default. This " "is because the database needs something to populate existing " "rows.\n" " 1) Provide a one-off default now which will be set on all " "existing rows\n" " 2) Quit and manually define a default value in models.py." ) # Monkeypatch interactive questioner to auto accept prompt_stdout = io.StringIO() with self.temporary_migration_module(module="migrations.test_auto_now_add"): call_command( "makemigrations", "migrations", interactive=True, stdout=prompt_stdout ) prompt_output = prompt_stdout.getvalue() self.assertIn(input_msg, prompt_output) self.assertIn("Please enter the default value as valid Python.", prompt_output) self.assertIn( "Accept the default 'timezone.now' by pressing 'Enter' or provide " "another value.", prompt_output, ) self.assertIn("Type 'exit' to exit this prompt", prompt_output) self.assertIn("Add field creation_date to entry", prompt_output) @mock.patch("builtins.input", return_value="2") def test_makemigrations_auto_now_add_interactive_quit(self, mock_input): class Author(models.Model): publishing_date = models.DateField(auto_now_add=True) class Meta: app_label = "migrations" with self.temporary_migration_module(module="migrations.test_migrations"): with captured_stdout(): with self.assertRaises(SystemExit): call_command("makemigrations", "migrations", interactive=True) def test_makemigrations_non_interactive_auto_now_add_addition(self): """ Non-interactive makemigrations fails when a default is missing on a new field when auto_now_add=True. """ class Entry(models.Model): creation_date = models.DateTimeField(auto_now_add=True) class Meta: app_label = "migrations" with self.temporary_migration_module(module="migrations.test_auto_now_add"): with self.assertRaises(SystemExit), captured_stdout() as out: call_command("makemigrations", "migrations", interactive=False) self.assertIn( "Field 'creation_date' on model 'entry' not migrated: it is " "impossible to add a field with 'auto_now_add=True' without " "specifying a default.", out.getvalue(), ) def test_makemigrations_interactive_unique_callable_default_addition(self): """ makemigrations prompts the user when adding a unique field with a callable default. """ class Book(models.Model): created = models.DateTimeField(unique=True, default=timezone.now) class Meta: app_label = "migrations" version = get_docs_version() input_msg = ( f"Callable default on unique field book.created will not generate " f"unique values upon migrating.\n" f"Please choose how to proceed:\n" f" 1) Continue making this migration as the first step in writing " f"a manual migration to generate unique values described here: " f"https://docs.djangoproject.com/en/{version}/howto/" f"writing-migrations/#migrations-that-add-unique-fields.\n" f" 2) Quit and edit field options in models.py.\n" ) with self.temporary_migration_module(module="migrations.test_migrations"): # 2 - quit. with mock.patch("builtins.input", return_value="2"): with captured_stdout() as out, self.assertRaises(SystemExit): call_command("makemigrations", "migrations", interactive=True) out_value = out.getvalue() self.assertIn(input_msg, out_value) self.assertNotIn("Add field created to book", out_value) # 1 - continue. with mock.patch("builtins.input", return_value="1"): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=True) out_value = out.getvalue() self.assertIn(input_msg, out_value) self.assertIn("Add field created to book", out_value) def test_makemigrations_non_interactive_unique_callable_default_addition(self): class Book(models.Model): created = models.DateTimeField(unique=True, default=timezone.now) class Meta: app_label = "migrations" with self.temporary_migration_module(module="migrations.test_migrations"): with captured_stdout() as out: call_command("makemigrations", "migrations", interactive=False) out_value = out.getvalue() self.assertIn("Add field created to book", out_value) @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"}, ) def test_makemigrations_continues_number_sequence_after_squash(self): with self.temporary_migration_module( module="migrations.test_migrations_squashed" ): with captured_stdout() as out: call_command( "makemigrations", "migrations", interactive=False, empty=True, ) out_value = out.getvalue() self.assertIn("0003_auto", out_value) def test_makemigrations_update(self): with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: migration_file = os.path.join(migration_dir, "0002_second.py") with open(migration_file) as fp: initial_content = fp.read() with captured_stdout() as out: call_command("makemigrations", "migrations", update=True) self.assertFalse( any( filename.startswith("0003") for filename in os.listdir(migration_dir) ) ) self.assertIs(os.path.exists(migration_file), False) new_migration_file = os.path.join( migration_dir, "0002_delete_tribble_author_rating_modelwithcustombase_and_more.py", ) with open(new_migration_file) as fp: self.assertNotEqual(initial_content, fp.read()) self.assertIn(f"Deleted {migration_file}", out.getvalue()) def test_makemigrations_update_existing_name(self): with self.temporary_migration_module( module="migrations.test_auto_now_add" ) as migration_dir: migration_file = os.path.join(migration_dir, "0001_initial.py") with open(migration_file) as fp: initial_content = fp.read() with captured_stdout() as out: call_command("makemigrations", "migrations", update=True) self.assertIs(os.path.exists(migration_file), False) new_migration_file = os.path.join( migration_dir, "0001_initial_updated.py", ) with open(new_migration_file) as fp: self.assertNotEqual(initial_content, fp.read()) self.assertIn(f"Deleted {migration_file}", out.getvalue()) def test_makemigrations_update_custom_name(self): custom_name = "delete_something" with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: old_migration_file = os.path.join(migration_dir, "0002_second.py") with open(old_migration_file) as fp: initial_content = fp.read() with captured_stdout() as out: call_command( "makemigrations", "migrations", update=True, name=custom_name ) self.assertFalse( any( filename.startswith("0003") for filename in os.listdir(migration_dir) ) ) self.assertIs(os.path.exists(old_migration_file), False) new_migration_file = os.path.join(migration_dir, f"0002_{custom_name}.py") self.assertIs(os.path.exists(new_migration_file), True) with open(new_migration_file) as fp: self.assertNotEqual(initial_content, fp.read()) self.assertIn(f"Deleted {old_migration_file}", out.getvalue()) def test_makemigrations_update_applied_migration(self): recorder = MigrationRecorder(connection) recorder.record_applied("migrations", "0001_initial") recorder.record_applied("migrations", "0002_second") with self.temporary_migration_module(module="migrations.test_migrations"): msg = "Cannot update applied migration 'migrations.0002_second'." with self.assertRaisesMessage(CommandError, msg): call_command("makemigrations", "migrations", update=True) def test_makemigrations_update_no_migration(self): with self.temporary_migration_module(module="migrations.test_migrations_empty"): msg = "App migrations has no migration, cannot update last migration." with self.assertRaisesMessage(CommandError, msg): call_command("makemigrations", "migrations", update=True) def test_makemigrations_update_squash_migration(self): with self.temporary_migration_module( module="migrations.test_migrations_squashed" ): msg = "Cannot update squash migration 'migrations.0001_squashed_0002'." with self.assertRaisesMessage(CommandError, msg): call_command("makemigrations", "migrations", update=True) def test_makemigrations_update_manual_porting(self): with self.temporary_migration_module( module="migrations.test_migrations_plan" ) as migration_dir: with captured_stdout() as out: call_command("makemigrations", "migrations", update=True) # Previous migration exists. previous_migration_file = os.path.join(migration_dir, "0005_fifth.py") self.assertIs(os.path.exists(previous_migration_file), True) # New updated migration exists. files = [f for f in os.listdir(migration_dir) if f.startswith("0005_auto")] updated_migration_file = os.path.join(migration_dir, files[0]) self.assertIs(os.path.exists(updated_migration_file), True) self.assertIn( f"Updated migration {updated_migration_file} requires manual porting.\n" f"Previous migration {previous_migration_file} was kept and must be " f"deleted after porting functions manually.", out.getvalue(), ) @override_settings( INSTALLED_APPS=[ "migrations.migrations_test_apps.alter_fk.author_app", "migrations.migrations_test_apps.alter_fk.book_app", ] ) def test_makemigrations_update_dependency_migration(self): with self.temporary_migration_module(app_label="book_app"): msg = ( "Cannot update migration 'book_app.0001_initial' that migrations " "'author_app.0002_alter_id' depend on." ) with self.assertRaisesMessage(CommandError, msg): call_command("makemigrations", "book_app", update=True) class SquashMigrationsTests(MigrationTestBase): """ Tests running the squashmigrations command. """ def test_squashmigrations_squashes(self): """ squashmigrations squashes migrations. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "squashmigrations", "migrations", "0002", interactive=False, stdout=out, no_color=True, ) squashed_migration_file = os.path.join( migration_dir, "0001_squashed_0002_second.py" ) self.assertTrue(os.path.exists(squashed_migration_file)) self.assertEqual( out.getvalue(), "Will squash the following migrations:\n" " - 0001_initial\n" " - 0002_second\n" "Optimizing...\n" " Optimized from 8 operations to 2 operations.\n" "Created new squashed migration %s\n" " You should commit this migration but leave the old ones in place;\n" " the new migration will be used for new installs. Once you are sure\n" " all instances of the codebase have applied the migrations you " "squashed,\n" " you can delete them.\n" % squashed_migration_file, ) def test_squashmigrations_initial_attribute(self): with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "squashmigrations", "migrations", "0002", interactive=False, verbosity=0 ) squashed_migration_file = os.path.join( migration_dir, "0001_squashed_0002_second.py" ) with open(squashed_migration_file, encoding="utf-8") as fp: content = fp.read() self.assertIn("initial = True", content) def test_squashmigrations_optimizes(self): """ squashmigrations optimizes operations. """ out = io.StringIO() with self.temporary_migration_module(module="migrations.test_migrations"): call_command( "squashmigrations", "migrations", "0002", interactive=False, verbosity=1, stdout=out, ) self.assertIn("Optimized from 8 operations to 2 operations.", out.getvalue()) def test_ticket_23799_squashmigrations_no_optimize(self): """ squashmigrations --no-optimize doesn't optimize operations. """ out = io.StringIO() with self.temporary_migration_module(module="migrations.test_migrations"): call_command( "squashmigrations", "migrations", "0002", interactive=False, verbosity=1, no_optimize=True, stdout=out, ) self.assertIn("Skipping optimization", out.getvalue()) def test_squashmigrations_valid_start(self): """ squashmigrations accepts a starting migration. """ out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_no_changes" ) as migration_dir: call_command( "squashmigrations", "migrations", "0002", "0003", interactive=False, verbosity=1, stdout=out, ) squashed_migration_file = os.path.join( migration_dir, "0002_second_squashed_0003_third.py" ) with open(squashed_migration_file, encoding="utf-8") as fp: content = fp.read() if HAS_BLACK: test_str = ' ("migrations", "0001_initial")' else: test_str = " ('migrations', '0001_initial')" self.assertIn(test_str, content) self.assertNotIn("initial = True", content) out = out.getvalue() self.assertNotIn(" - 0001_initial", out) self.assertIn(" - 0002_second", out) self.assertIn(" - 0003_third", out) def test_squashmigrations_invalid_start(self): """ squashmigrations doesn't accept a starting migration after the ending migration. """ with self.temporary_migration_module( module="migrations.test_migrations_no_changes" ): msg = ( "The migration 'migrations.0003_third' cannot be found. Maybe " "it comes after the migration 'migrations.0002_second'" ) with self.assertRaisesMessage(CommandError, msg): call_command( "squashmigrations", "migrations", "0003", "0002", interactive=False, verbosity=0, ) def test_squashed_name_with_start_migration_name(self): """--squashed-name specifies the new migration's name.""" squashed_name = "squashed_name" with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "squashmigrations", "migrations", "0001", "0002", squashed_name=squashed_name, interactive=False, verbosity=0, ) squashed_migration_file = os.path.join( migration_dir, "0001_%s.py" % squashed_name ) self.assertTrue(os.path.exists(squashed_migration_file)) def test_squashed_name_without_start_migration_name(self): """--squashed-name also works if a start migration is omitted.""" squashed_name = "squashed_name" with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "squashmigrations", "migrations", "0001", squashed_name=squashed_name, interactive=False, verbosity=0, ) squashed_migration_file = os.path.join( migration_dir, "0001_%s.py" % squashed_name ) self.assertTrue(os.path.exists(squashed_migration_file)) def test_squashed_name_exists(self): msg = "Migration 0001_initial already exists. Use a different name." with self.temporary_migration_module(module="migrations.test_migrations"): with self.assertRaisesMessage(CommandError, msg): call_command( "squashmigrations", "migrations", "0001", "0002", squashed_name="initial", interactive=False, verbosity=0, ) def test_squashmigrations_manual_porting(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_manual_porting", ) as migration_dir: call_command( "squashmigrations", "migrations", "0002", interactive=False, stdout=out, no_color=True, ) squashed_migration_file = os.path.join( migration_dir, "0001_squashed_0002_second.py", ) self.assertTrue(os.path.exists(squashed_migration_file)) black_warning = "" if HAS_BLACK: black_warning = ( "Squashed migration couldn't be formatted using the " '"black" command. You can call it manually.\n' ) self.assertEqual( out.getvalue(), f"Will squash the following migrations:\n" f" - 0001_initial\n" f" - 0002_second\n" f"Optimizing...\n" f" No optimizations possible.\n" f"Created new squashed migration {squashed_migration_file}\n" f" You should commit this migration but leave the old ones in place;\n" f" the new migration will be used for new installs. Once you are sure\n" f" all instances of the codebase have applied the migrations you " f"squashed,\n" f" you can delete them.\n" f"Manual porting required\n" f" Your migrations contained functions that must be manually copied " f"over,\n" f" as we could not safely copy their implementation.\n" f" See the comment at the top of the squashed migration for details.\n" + black_warning, ) def test_failure_to_format_code(self): self.assertFormatterFailureCaught( "squashmigrations", "migrations", "0002", interactive=False ) class AppLabelErrorTests(TestCase): """ This class inherits TestCase because MigrationTestBase uses `available_apps = ['migrations']` which means that it's the only installed app. 'django.contrib.auth' must be in INSTALLED_APPS for some of these tests. """ nonexistent_app_error = "No installed app with label 'nonexistent_app'." did_you_mean_auth_error = ( "No installed app with label 'django.contrib.auth'. Did you mean 'auth'?" ) def test_makemigrations_nonexistent_app_label(self): err = io.StringIO() with self.assertRaises(SystemExit): call_command("makemigrations", "nonexistent_app", stderr=err) self.assertIn(self.nonexistent_app_error, err.getvalue()) def test_makemigrations_app_name_specified_as_label(self): err = io.StringIO() with self.assertRaises(SystemExit): call_command("makemigrations", "django.contrib.auth", stderr=err) self.assertIn(self.did_you_mean_auth_error, err.getvalue()) def test_migrate_nonexistent_app_label(self): with self.assertRaisesMessage(CommandError, self.nonexistent_app_error): call_command("migrate", "nonexistent_app") def test_migrate_app_name_specified_as_label(self): with self.assertRaisesMessage(CommandError, self.did_you_mean_auth_error): call_command("migrate", "django.contrib.auth") def test_showmigrations_nonexistent_app_label(self): err = io.StringIO() with self.assertRaises(SystemExit): call_command("showmigrations", "nonexistent_app", stderr=err) self.assertIn(self.nonexistent_app_error, err.getvalue()) def test_showmigrations_app_name_specified_as_label(self): err = io.StringIO() with self.assertRaises(SystemExit): call_command("showmigrations", "django.contrib.auth", stderr=err) self.assertIn(self.did_you_mean_auth_error, err.getvalue()) def test_sqlmigrate_nonexistent_app_label(self): with self.assertRaisesMessage(CommandError, self.nonexistent_app_error): call_command("sqlmigrate", "nonexistent_app", "0002") def test_sqlmigrate_app_name_specified_as_label(self): with self.assertRaisesMessage(CommandError, self.did_you_mean_auth_error): call_command("sqlmigrate", "django.contrib.auth", "0002") def test_squashmigrations_nonexistent_app_label(self): with self.assertRaisesMessage(CommandError, self.nonexistent_app_error): call_command("squashmigrations", "nonexistent_app", "0002") def test_squashmigrations_app_name_specified_as_label(self): with self.assertRaisesMessage(CommandError, self.did_you_mean_auth_error): call_command("squashmigrations", "django.contrib.auth", "0002") def test_optimizemigration_nonexistent_app_label(self): with self.assertRaisesMessage(CommandError, self.nonexistent_app_error): call_command("optimizemigration", "nonexistent_app", "0002") def test_optimizemigration_app_name_specified_as_label(self): with self.assertRaisesMessage(CommandError, self.did_you_mean_auth_error): call_command("optimizemigration", "django.contrib.auth", "0002") class OptimizeMigrationTests(MigrationTestBase): def test_no_optimization_possible(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "optimizemigration", "migrations", "0002", stdout=out, no_color=True ) migration_file = os.path.join(migration_dir, "0002_second.py") self.assertTrue(os.path.exists(migration_file)) call_command( "optimizemigration", "migrations", "0002", stdout=out, no_color=True, verbosity=0, ) self.assertEqual(out.getvalue(), "No optimizations possible.\n") def test_optimization(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "optimizemigration", "migrations", "0001", stdout=out, no_color=True ) initial_migration_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_migration_file)) with open(initial_migration_file) as fp: content = fp.read() self.assertIn( ( '("bool", models.BooleanField' if HAS_BLACK else "('bool', models.BooleanField" ), content, ) self.assertEqual( out.getvalue(), f"Optimizing from 4 operations to 2 operations.\n" f"Optimized migration {initial_migration_file}\n", ) def test_optimization_no_verbosity(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations" ) as migration_dir: call_command( "optimizemigration", "migrations", "0001", stdout=out, no_color=True, verbosity=0, ) initial_migration_file = os.path.join(migration_dir, "0001_initial.py") self.assertTrue(os.path.exists(initial_migration_file)) with open(initial_migration_file) as fp: content = fp.read() self.assertIn( ( '("bool", models.BooleanField' if HAS_BLACK else "('bool', models.BooleanField" ), content, ) self.assertEqual(out.getvalue(), "") def test_creates_replace_migration_manual_porting(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_manual_porting" ) as migration_dir: call_command( "optimizemigration", "migrations", "0003", stdout=out, no_color=True ) optimized_migration_file = os.path.join( migration_dir, "0003_third_optimized.py" ) self.assertTrue(os.path.exists(optimized_migration_file)) with open(optimized_migration_file) as fp: content = fp.read() self.assertIn("replaces = [", content) black_warning = "" if HAS_BLACK: black_warning = ( "Optimized migration couldn't be formatted using the " '"black" command. You can call it manually.\n' ) self.assertEqual( out.getvalue(), "Optimizing from 3 operations to 2 operations.\n" "Manual porting required\n" " Your migrations contained functions that must be manually copied over,\n" " as we could not safely copy their implementation.\n" " See the comment at the top of the optimized migration for details.\n" + black_warning + f"Optimized migration {optimized_migration_file}\n", ) def test_fails_squash_migration_manual_porting(self): out = io.StringIO() with self.temporary_migration_module( module="migrations.test_migrations_manual_porting" ) as migration_dir: version = get_docs_version() msg = ( f"Migration will require manual porting but is already a squashed " f"migration.\nTransition to a normal migration first: " f"https://docs.djangoproject.com/en/{version}/topics/migrations/" f"#squashing-migrations" ) with self.assertRaisesMessage(CommandError, msg): call_command("optimizemigration", "migrations", "0004", stdout=out) optimized_migration_file = os.path.join( migration_dir, "0004_fourth_optimized.py" ) self.assertFalse(os.path.exists(optimized_migration_file)) self.assertEqual( out.getvalue(), "Optimizing from 3 operations to 2 operations.\n" ) @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_optimizemigration_check(self): with self.assertRaises(SystemExit): call_command( "optimizemigration", "--check", "migrations", "0001", verbosity=0 ) call_command("optimizemigration", "--check", "migrations", "0002", verbosity=0) @override_settings( INSTALLED_APPS=["migrations.migrations_test_apps.unmigrated_app_simple"], ) def test_app_without_migrations(self): msg = "App 'unmigrated_app_simple' does not have migrations." with self.assertRaisesMessage(CommandError, msg): call_command("optimizemigration", "unmigrated_app_simple", "0001") @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations_clashing_prefix"}, ) def test_ambigious_prefix(self): msg = ( "More than one migration matches 'a' in app 'migrations'. Please " "be more specific." ) with self.assertRaisesMessage(CommandError, msg): call_command("optimizemigration", "migrations", "a") @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"}) def test_unknown_prefix(self): msg = "Cannot find a migration matching 'nonexistent' from app 'migrations'." with self.assertRaisesMessage(CommandError, msg): call_command("optimizemigration", "migrations", "nonexistent") def test_failure_to_format_code(self): self.assertFormatterFailureCaught("optimizemigration", "migrations", "0001") class CustomMigrationCommandTests(MigrationTestBase): @override_settings( MIGRATION_MODULES={"migrations": "migrations.test_migrations"}, INSTALLED_APPS=["migrations.migrations_test_apps.migrated_app"], ) @isolate_apps("migrations.migrations_test_apps.migrated_app") def test_makemigrations_custom_autodetector(self): class CustomAutodetector(MigrationAutodetector): def changes(self, *args, **kwargs): return [] class CustomMakeMigrationsCommand(MakeMigrationsCommand): autodetector = CustomAutodetector class NewModel(models.Model): class Meta: app_label = "migrated_app" out = io.StringIO() command = CustomMakeMigrationsCommand(stdout=out) call_command(command, "migrated_app", stdout=out) self.assertIn("No changes detected", out.getvalue()) @override_settings(INSTALLED_APPS=["migrations.migrations_test_apps.migrated_app"]) @isolate_apps("migrations.migrations_test_apps.migrated_app") def test_migrate_custom_autodetector(self): class CustomAutodetector(MigrationAutodetector): def changes(self, *args, **kwargs): return [] class CustomMigrateCommand(MigrateCommand): autodetector = CustomAutodetector class NewModel(models.Model): class Meta: app_label = "migrated_app" out = io.StringIO() command = CustomMigrateCommand(stdout=out) out = io.StringIO() try: call_command(command, verbosity=0) call_command(command, stdout=out, no_color=True) command_stdout = out.getvalue().lower() self.assertEqual( "operations to perform:\n" " apply all migrations: migrated_app\n" "running migrations:\n" " no migrations to apply.\n", command_stdout, ) finally: call_command(command, "migrated_app", "zero", verbosity=0)