from __future__ import unicode_literals import unittest try: import sqlparse except ImportError: sqlparse = None from django import test from django.test import override_settings from django.db import connection, migrations, models, router from django.db.migrations.migration import Migration from django.db.migrations.state import ProjectState from django.db.models.fields import NOT_PROVIDED from django.db.transaction import atomic from django.db.utils import IntegrityError, DatabaseError from .test_base import MigrationTestBase class OperationTestBase(MigrationTestBase): """ Common functions to help test operations. """ def apply_operations(self, app_label, project_state, operations): migration = Migration('name', app_label) migration.operations = operations with connection.schema_editor() as editor: return migration.apply(project_state, editor) def unapply_operations(self, app_label, project_state, operations): migration = Migration('name', app_label) migration.operations = operations with connection.schema_editor() as editor: return migration.unapply(project_state, editor) def make_test_state(self, app_label, operation, **kwargs): """ Makes a test state using set_up_test_model and returns the original state and the state after the migration is applied. """ project_state = self.set_up_test_model(app_label, **kwargs) new_state = project_state.clone() operation.state_forwards(app_label, new_state) return project_state, new_state def set_up_test_model(self, app_label, second_model=False, third_model=False, related_model=False, mti_model=False, proxy_model=False, unique_together=False, options=False, db_table=None): """ Creates a test model state and database table. """ # Delete the tables if they already exist with connection.cursor() as cursor: # Start with ManyToMany tables try: cursor.execute("DROP TABLE %s_pony_stables" % app_label) except DatabaseError: pass try: cursor.execute("DROP TABLE %s_pony_vans" % app_label) except DatabaseError: pass # Then standard model tables try: cursor.execute("DROP TABLE %s_pony" % app_label) except DatabaseError: pass try: cursor.execute("DROP TABLE %s_stable" % app_label) except DatabaseError: pass try: cursor.execute("DROP TABLE %s_van" % app_label) except DatabaseError: pass # Make the "current" state model_options = { "swappable": "TEST_SWAP_MODEL", "unique_together": [["pink", "weight"]] if unique_together else [], } if options: model_options["permissions"] = [("can_groom", "Can groom")] if db_table: model_options["db_table"] = db_table operations = [migrations.CreateModel( "Pony", [ ("id", models.AutoField(primary_key=True)), ("pink", models.IntegerField(default=3)), ("weight", models.FloatField()), ], options=model_options, )] if second_model: operations.append(migrations.CreateModel( "Stable", [ ("id", models.AutoField(primary_key=True)), ] )) if third_model: operations.append(migrations.CreateModel( "Van", [ ("id", models.AutoField(primary_key=True)), ] )) if related_model: operations.append(migrations.CreateModel( "Rider", [ ("id", models.AutoField(primary_key=True)), ("pony", models.ForeignKey("Pony")), ("friend", models.ForeignKey("self")) ], )) if mti_model: operations.append(migrations.CreateModel( "ShetlandPony", fields=[ ('pony_ptr', models.OneToOneField( auto_created=True, primary_key=True, to_field='id', serialize=False, to='Pony', )), ("cuteness", models.IntegerField(default=1)), ], bases=['%s.Pony' % app_label], )) if proxy_model: operations.append(migrations.CreateModel( "ProxyPony", fields=[], options={"proxy": True}, bases=['%s.Pony' % app_label], )) return self.apply_operations(app_label, ProjectState(), operations) class OperationTests(OperationTestBase): """ Tests running the operations and making sure they do what they say they do. Each test looks at their state changing, and then their database operation - both forwards and backwards. """ def test_create_model(self): """ Tests the CreateModel operation. Most other tests use this operation as part of setup, so check failures here first. """ operation = migrations.CreateModel( "Pony", [ ("id", models.AutoField(primary_key=True)), ("pink", models.IntegerField(default=1)), ], ) self.assertEqual(operation.describe(), "Create model Pony") # Test the state alteration project_state = ProjectState() new_state = project_state.clone() operation.state_forwards("test_crmo", new_state) self.assertEqual(new_state.models["test_crmo", "pony"].name, "Pony") self.assertEqual(len(new_state.models["test_crmo", "pony"].fields), 2) # Test the database alteration self.assertTableNotExists("test_crmo_pony") with connection.schema_editor() as editor: operation.database_forwards("test_crmo", editor, project_state, new_state) self.assertTableExists("test_crmo_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crmo", editor, new_state, project_state) self.assertTableNotExists("test_crmo_pony") # And deconstruction definition = operation.deconstruct() self.assertEqual(definition[0], "CreateModel") self.assertEqual(len(definition[1]), 2) self.assertEqual(len(definition[2]), 0) self.assertEqual(definition[1][0], "Pony") def test_create_model_with_unique_after(self): """ Tests the CreateModel operation directly followed by an AlterUniqueTogether (bug #22844 - sqlite remake issues) """ operation1 = migrations.CreateModel( "Pony", [ ("id", models.AutoField(primary_key=True)), ("pink", models.IntegerField(default=1)), ], ) operation2 = migrations.CreateModel( "Rider", [ ("id", models.AutoField(primary_key=True)), ("number", models.IntegerField(default=1)), ("pony", models.ForeignKey("test_crmoua.Pony")), ], ) operation3 = migrations.AlterUniqueTogether( "Rider", [ ("number", "pony"), ], ) # Test the database alteration project_state = ProjectState() self.assertTableNotExists("test_crmoua_pony") self.assertTableNotExists("test_crmoua_rider") with connection.schema_editor() as editor: new_state = project_state.clone() operation1.state_forwards("test_crmoua", new_state) operation1.database_forwards("test_crmoua", editor, project_state, new_state) project_state, new_state = new_state, new_state.clone() operation2.state_forwards("test_crmoua", new_state) operation2.database_forwards("test_crmoua", editor, project_state, new_state) project_state, new_state = new_state, new_state.clone() operation3.state_forwards("test_crmoua", new_state) operation3.database_forwards("test_crmoua", editor, project_state, new_state) self.assertTableExists("test_crmoua_pony") self.assertTableExists("test_crmoua_rider") def test_create_model_m2m(self): """ Test the creation of a model with a ManyToMany field and the auto-created "through" model. """ project_state = self.set_up_test_model("test_crmomm") operation = migrations.CreateModel( "Stable", [ ("id", models.AutoField(primary_key=True)), ("ponies", models.ManyToManyField("Pony", related_name="stables")) ] ) # Test the state alteration new_state = project_state.clone() operation.state_forwards("test_crmomm", new_state) # Test the database alteration self.assertTableNotExists("test_crmomm_stable_ponies") with connection.schema_editor() as editor: operation.database_forwards("test_crmomm", editor, project_state, new_state) self.assertTableExists("test_crmomm_stable") self.assertTableExists("test_crmomm_stable_ponies") self.assertColumnNotExists("test_crmomm_stable", "ponies") # Make sure the M2M field actually works with atomic(): new_apps = new_state.render() Pony = new_apps.get_model("test_crmomm", "Pony") Stable = new_apps.get_model("test_crmomm", "Stable") stable = Stable.objects.create() p1 = Pony.objects.create(pink=False, weight=4.55) p2 = Pony.objects.create(pink=True, weight=5.43) stable.ponies.add(p1, p2) self.assertEqual(stable.ponies.count(), 2) stable.ponies.all().delete() # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crmomm", editor, new_state, project_state) self.assertTableNotExists("test_crmomm_stable") self.assertTableNotExists("test_crmomm_stable_ponies") def test_create_model_inheritance(self): """ Tests the CreateModel operation on a multi-table inheritance setup. """ project_state = self.set_up_test_model("test_crmoih") # Test the state alteration operation = migrations.CreateModel( "ShetlandPony", [ ('pony_ptr', models.OneToOneField( auto_created=True, primary_key=True, to_field='id', serialize=False, to='test_crmoih.Pony', )), ("cuteness", models.IntegerField(default=1)), ], ) new_state = project_state.clone() operation.state_forwards("test_crmoih", new_state) self.assertIn(("test_crmoih", "shetlandpony"), new_state.models) # Test the database alteration self.assertTableNotExists("test_crmoih_shetlandpony") with connection.schema_editor() as editor: operation.database_forwards("test_crmoih", editor, project_state, new_state) self.assertTableExists("test_crmoih_shetlandpony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crmoih", editor, new_state, project_state) self.assertTableNotExists("test_crmoih_shetlandpony") def test_create_proxy_model(self): """ Tests that CreateModel ignores proxy models. """ project_state = self.set_up_test_model("test_crprmo") # Test the state alteration operation = migrations.CreateModel( "ProxyPony", [], options={"proxy": True}, bases=("test_crprmo.Pony", ), ) self.assertEqual(operation.describe(), "Create proxy model ProxyPony") new_state = project_state.clone() operation.state_forwards("test_crprmo", new_state) self.assertIn(("test_crprmo", "proxypony"), new_state.models) # Test the database alteration self.assertTableNotExists("test_crprmo_proxypony") self.assertTableExists("test_crprmo_pony") with connection.schema_editor() as editor: operation.database_forwards("test_crprmo", editor, project_state, new_state) self.assertTableNotExists("test_crprmo_proxypony") self.assertTableExists("test_crprmo_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crprmo", editor, new_state, project_state) self.assertTableNotExists("test_crprmo_proxypony") self.assertTableExists("test_crprmo_pony") def test_create_unmanaged_model(self): """ Tests that CreateModel ignores unmanaged models. """ project_state = self.set_up_test_model("test_crummo") # Test the state alteration operation = migrations.CreateModel( "UnmanagedPony", [], options={"proxy": True}, bases=("test_crummo.Pony", ), ) self.assertEqual(operation.describe(), "Create proxy model UnmanagedPony") new_state = project_state.clone() operation.state_forwards("test_crummo", new_state) self.assertIn(("test_crummo", "unmanagedpony"), new_state.models) # Test the database alteration self.assertTableNotExists("test_crummo_unmanagedpony") self.assertTableExists("test_crummo_pony") with connection.schema_editor() as editor: operation.database_forwards("test_crummo", editor, project_state, new_state) self.assertTableNotExists("test_crummo_unmanagedpony") self.assertTableExists("test_crummo_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crummo", editor, new_state, project_state) self.assertTableNotExists("test_crummo_unmanagedpony") self.assertTableExists("test_crummo_pony") def test_delete_model(self): """ Tests the DeleteModel operation. """ project_state = self.set_up_test_model("test_dlmo") # Test the state alteration operation = migrations.DeleteModel("Pony") self.assertEqual(operation.describe(), "Delete model Pony") new_state = project_state.clone() operation.state_forwards("test_dlmo", new_state) self.assertNotIn(("test_dlmo", "pony"), new_state.models) # Test the database alteration self.assertTableExists("test_dlmo_pony") with connection.schema_editor() as editor: operation.database_forwards("test_dlmo", editor, project_state, new_state) self.assertTableNotExists("test_dlmo_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_dlmo", editor, new_state, project_state) self.assertTableExists("test_dlmo_pony") def test_delete_proxy_model(self): """ Tests the DeleteModel operation ignores proxy models. """ project_state = self.set_up_test_model("test_dlprmo", proxy_model=True) # Test the state alteration operation = migrations.DeleteModel("ProxyPony") new_state = project_state.clone() operation.state_forwards("test_dlprmo", new_state) self.assertIn(("test_dlprmo", "proxypony"), project_state.models) self.assertNotIn(("test_dlprmo", "proxypony"), new_state.models) # Test the database alteration self.assertTableExists("test_dlprmo_pony") self.assertTableNotExists("test_dlprmo_proxypony") with connection.schema_editor() as editor: operation.database_forwards("test_dlprmo", editor, project_state, new_state) self.assertTableExists("test_dlprmo_pony") self.assertTableNotExists("test_dlprmo_proxypony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_dlprmo", editor, new_state, project_state) self.assertTableExists("test_dlprmo_pony") self.assertTableNotExists("test_dlprmo_proxypony") def test_rename_model(self): """ Tests the RenameModel operation. """ project_state = self.set_up_test_model("test_rnmo", related_model=True) # Test the state alteration operation = migrations.RenameModel("Pony", "Horse") self.assertEqual(operation.describe(), "Rename model Pony to Horse") new_state = project_state.clone() operation.state_forwards("test_rnmo", new_state) self.assertNotIn(("test_rnmo", "pony"), new_state.models) self.assertIn(("test_rnmo", "horse"), new_state.models) # Remember, RenameModel also repoints all incoming FKs and M2Ms self.assertEqual("test_rnmo.Horse", new_state.models["test_rnmo", "rider"].fields[1][1].rel.to) # Test the database alteration self.assertTableExists("test_rnmo_pony") self.assertTableNotExists("test_rnmo_horse") if connection.features.supports_foreign_keys: self.assertFKExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_pony", "id")) self.assertFKNotExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_horse", "id")) with connection.schema_editor() as editor: operation.database_forwards("test_rnmo", editor, project_state, new_state) self.assertTableNotExists("test_rnmo_pony") self.assertTableExists("test_rnmo_horse") if connection.features.supports_foreign_keys: self.assertFKNotExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_pony", "id")) self.assertFKExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_horse", "id")) # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_rnmo", editor, new_state, project_state) self.assertTableExists("test_rnmo_pony") self.assertTableNotExists("test_rnmo_horse") if connection.features.supports_foreign_keys: self.assertFKExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_pony", "id")) self.assertFKNotExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_horse", "id")) def test_rename_model_with_self_referential_fk(self): """ Tests the RenameModel operation on model with self referential FK. """ project_state = self.set_up_test_model("test_rmwsrf", related_model=True) # Test the state alteration operation = migrations.RenameModel("Rider", "HorseRider") self.assertEqual(operation.describe(), "Rename model Rider to HorseRider") new_state = project_state.clone() operation.state_forwards("test_rmwsrf", new_state) self.assertNotIn(("test_rmwsrf", "rider"), new_state.models) self.assertIn(("test_rmwsrf", "horserider"), new_state.models) # Remember, RenameModel also repoints all incoming FKs and M2Ms self.assertEqual("test_rmwsrf.HorseRider", new_state.models["test_rmwsrf", "horserider"].fields[2][1].rel.to) # Test the database alteration self.assertTableExists("test_rmwsrf_rider") self.assertTableNotExists("test_rmwsrf_horserider") if connection.features.supports_foreign_keys: self.assertFKExists("test_rmwsrf_rider", ["friend_id"], ("test_rmwsrf_rider", "id")) self.assertFKNotExists("test_rmwsrf_rider", ["friend_id"], ("test_rmwsrf_horserider", "id")) with connection.schema_editor() as editor: operation.database_forwards("test_rmwsrf", editor, project_state, new_state) self.assertTableNotExists("test_rmwsrf_rider") self.assertTableExists("test_rmwsrf_horserider") if connection.features.supports_foreign_keys: self.assertFKNotExists("test_rmwsrf_horserider", ["friend_id"], ("test_rmwsrf_rider", "id")) self.assertFKExists("test_rmwsrf_horserider", ["friend_id"], ("test_rmwsrf_horserider", "id")) # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_rmwsrf", editor, new_state, project_state) self.assertTableExists("test_rmwsrf_rider") self.assertTableNotExists("test_rmwsrf_horserider") if connection.features.supports_foreign_keys: self.assertFKExists("test_rmwsrf_rider", ["friend_id"], ("test_rmwsrf_rider", "id")) self.assertFKNotExists("test_rmwsrf_rider", ["friend_id"], ("test_rmwsrf_horserider", "id")) def test_rename_model_with_self_referential_m2m(self): app_label = "test_rename_model_with_self_referential_m2m" project_state = self.apply_operations(app_label, ProjectState(), operations=[ migrations.CreateModel("ReflexivePony", fields=[ ("ponies", models.ManyToManyField("self")), ]), ]) project_state = self.apply_operations(app_label, project_state, operations=[ migrations.RenameModel("ReflexivePony", "ReflexivePony2"), ]) apps = project_state.render() Pony = apps.get_model(app_label, "ReflexivePony2") pony = Pony.objects.create() pony.ponies.add(pony) def test_add_field(self): """ Tests the AddField operation. """ # Test the state alteration operation = migrations.AddField( "Pony", "height", models.FloatField(null=True, default=5), ) self.assertEqual(operation.describe(), "Add field height to Pony") project_state, new_state = self.make_test_state("test_adfl", operation) self.assertEqual(len(new_state.models["test_adfl", "pony"].fields), 4) field = [ f for n, f in new_state.models["test_adfl", "pony"].fields if n == "height" ][0] self.assertEqual(field.default, 5) # Test the database alteration self.assertColumnNotExists("test_adfl_pony", "height") with connection.schema_editor() as editor: operation.database_forwards("test_adfl", editor, project_state, new_state) self.assertColumnExists("test_adfl_pony", "height") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_adfl", editor, new_state, project_state) self.assertColumnNotExists("test_adfl_pony", "height") def test_add_charfield(self): """ Tests the AddField operation on TextField. """ project_state = self.set_up_test_model("test_adchfl") new_apps = project_state.render() Pony = new_apps.get_model("test_adchfl", "Pony") pony = Pony.objects.create(weight=42) new_state = self.apply_operations("test_adchfl", project_state, [ migrations.AddField( "Pony", "text", models.CharField(max_length=10, default="some text"), ), migrations.AddField( "Pony", "empty", models.CharField(max_length=10, default=""), ), # If not properly quoted digits would be interpreted as an int. migrations.AddField( "Pony", "digits", models.CharField(max_length=10, default="42"), ), # Manual quoting is fragile and could trip on quotes. Refs #xyz. migrations.AddField( "Pony", "quotes", models.CharField(max_length=10, default='"\'"'), ), ]) new_apps = new_state.render() Pony = new_apps.get_model("test_adchfl", "Pony") pony = Pony.objects.get(pk=pony.pk) self.assertEqual(pony.text, "some text") self.assertEqual(pony.empty, "") self.assertEqual(pony.digits, "42") self.assertEqual(pony.quotes, '"\'"') def test_add_textfield(self): """ Tests the AddField operation on TextField. """ project_state = self.set_up_test_model("test_adtxtfl") new_apps = project_state.render() Pony = new_apps.get_model("test_adtxtfl", "Pony") pony = Pony.objects.create(weight=42) new_state = self.apply_operations("test_adtxtfl", project_state, [ migrations.AddField( "Pony", "text", models.TextField(default="some text"), ), migrations.AddField( "Pony", "empty", models.TextField(default=""), ), # If not properly quoted digits would be interpreted as an int. migrations.AddField( "Pony", "digits", models.TextField(default="42"), ), # Manual quoting is fragile and could trip on quotes. Refs #xyz. migrations.AddField( "Pony", "quotes", models.TextField(default='"\'"'), ), ]) new_apps = new_state.render() Pony = new_apps.get_model("test_adtxtfl", "Pony") pony = Pony.objects.get(pk=pony.pk) self.assertEqual(pony.text, "some text") self.assertEqual(pony.empty, "") self.assertEqual(pony.digits, "42") self.assertEqual(pony.quotes, '"\'"') @test.skipUnlessDBFeature('supports_binary_field') def test_add_binaryfield(self): """ Tests the AddField operation on TextField/BinaryField. """ project_state = self.set_up_test_model("test_adbinfl") new_apps = project_state.render() Pony = new_apps.get_model("test_adbinfl", "Pony") pony = Pony.objects.create(weight=42) new_state = self.apply_operations("test_adbinfl", project_state, [ migrations.AddField( "Pony", "blob", models.BinaryField(default=b"some text"), ), migrations.AddField( "Pony", "empty", models.BinaryField(default=b""), ), # If not properly quoted digits would be interpreted as an int. migrations.AddField( "Pony", "digits", models.BinaryField(default=b"42"), ), # Manual quoting is fragile and could trip on quotes. Refs #xyz. migrations.AddField( "Pony", "quotes", models.BinaryField(default=b'"\'"'), ), ]) new_apps = new_state.render() Pony = new_apps.get_model("test_adbinfl", "Pony") pony = Pony.objects.get(pk=pony.pk) # SQLite returns buffer/memoryview, cast to bytes for checking. self.assertEqual(bytes(pony.blob), b"some text") self.assertEqual(bytes(pony.empty), b"") self.assertEqual(bytes(pony.digits), b"42") self.assertEqual(bytes(pony.quotes), b'"\'"') def test_column_name_quoting(self): """ Column names that are SQL keywords shouldn't cause problems when used in migrations (#22168). """ project_state = self.set_up_test_model("test_regr22168") operation = migrations.AddField( "Pony", "order", models.IntegerField(default=0), ) new_state = project_state.clone() operation.state_forwards("test_regr22168", new_state) with connection.schema_editor() as editor: operation.database_forwards("test_regr22168", editor, project_state, new_state) self.assertColumnExists("test_regr22168_pony", "order") def test_add_field_preserve_default(self): """ Tests the AddField operation's state alteration when preserve_default = False. """ project_state = self.set_up_test_model("test_adflpd") # Test the state alteration operation = migrations.AddField( "Pony", "height", models.FloatField(null=True, default=4), preserve_default=False, ) new_state = project_state.clone() operation.state_forwards("test_adflpd", new_state) self.assertEqual(len(new_state.models["test_adflpd", "pony"].fields), 4) field = [ f for n, f in new_state.models["test_adflpd", "pony"].fields if n == "height" ][0] self.assertEqual(field.default, NOT_PROVIDED) # Test the database alteration project_state.render().get_model("test_adflpd", "pony").objects.create( weight=4, ) self.assertColumnNotExists("test_adflpd_pony", "height") with connection.schema_editor() as editor: operation.database_forwards("test_adflpd", editor, project_state, new_state) self.assertColumnExists("test_adflpd_pony", "height") def test_add_field_m2m(self): """ Tests the AddField operation with a ManyToManyField. """ project_state = self.set_up_test_model("test_adflmm", second_model=True) # Test the state alteration operation = migrations.AddField("Pony", "stables", models.ManyToManyField("Stable", related_name="ponies")) new_state = project_state.clone() operation.state_forwards("test_adflmm", new_state) self.assertEqual(len(new_state.models["test_adflmm", "pony"].fields), 4) # Test the database alteration self.assertTableNotExists("test_adflmm_pony_stables") with connection.schema_editor() as editor: operation.database_forwards("test_adflmm", editor, project_state, new_state) self.assertTableExists("test_adflmm_pony_stables") self.assertColumnNotExists("test_adflmm_pony", "stables") # Make sure the M2M field actually works with atomic(): new_apps = new_state.render() Pony = new_apps.get_model("test_adflmm", "Pony") p = Pony.objects.create(pink=False, weight=4.55) p.stables.create() self.assertEqual(p.stables.count(), 1) p.stables.all().delete() # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_adflmm", editor, new_state, project_state) self.assertTableNotExists("test_adflmm_pony_stables") def test_alter_field_m2m(self): project_state = self.set_up_test_model("test_alflmm", second_model=True) project_state = self.apply_operations("test_alflmm", project_state, operations=[ migrations.AddField("Pony", "stables", models.ManyToManyField("Stable", related_name="ponies")) ]) new_apps = project_state.render() Pony = new_apps.get_model("test_alflmm", "Pony") self.assertFalse(Pony._meta.get_field('stables').blank) project_state = self.apply_operations("test_alflmm", project_state, operations=[ migrations.AlterField("Pony", "stables", models.ManyToManyField(to="Stable", related_name="ponies", blank=True)) ]) new_apps = project_state.render() Pony = new_apps.get_model("test_alflmm", "Pony") self.assertTrue(Pony._meta.get_field('stables').blank) def test_repoint_field_m2m(self): project_state = self.set_up_test_model("test_alflmm", second_model=True, third_model=True) project_state = self.apply_operations("test_alflmm", project_state, operations=[ migrations.AddField("Pony", "places", models.ManyToManyField("Stable", related_name="ponies")) ]) new_apps = project_state.render() Pony = new_apps.get_model("test_alflmm", "Pony") project_state = self.apply_operations("test_alflmm", project_state, operations=[ migrations.AlterField("Pony", "places", models.ManyToManyField(to="Van", related_name="ponies")) ]) # Ensure the new field actually works new_apps = project_state.render() Pony = new_apps.get_model("test_alflmm", "Pony") p = Pony.objects.create(pink=False, weight=4.55) p.places.create() self.assertEqual(p.places.count(), 1) p.places.all().delete() def test_remove_field_m2m(self): project_state = self.set_up_test_model("test_rmflmm", second_model=True) project_state = self.apply_operations("test_rmflmm", project_state, operations=[ migrations.AddField("Pony", "stables", models.ManyToManyField("Stable", related_name="ponies")) ]) self.assertTableExists("test_rmflmm_pony_stables") operations = [migrations.RemoveField("Pony", "stables")] self.apply_operations("test_rmflmm", project_state, operations=operations) self.assertTableNotExists("test_rmflmm_pony_stables") # And test reversal self.unapply_operations("test_rmflmm", project_state, operations=operations) self.assertTableExists("test_rmflmm_pony_stables") def test_remove_field_m2m_with_through(self): project_state = self.set_up_test_model("test_rmflmmwt", second_model=True) self.assertTableNotExists("test_rmflmmwt_ponystables") project_state = self.apply_operations("test_rmflmmwt", project_state, operations=[ migrations.CreateModel("PonyStables", fields=[ ("pony", models.ForeignKey('test_rmflmmwt.Pony')), ("stable", models.ForeignKey('test_rmflmmwt.Stable')), ]), migrations.AddField("Pony", "stables", models.ManyToManyField("Stable", related_name="ponies", through='test_rmflmmwt.PonyStables')) ]) self.assertTableExists("test_rmflmmwt_ponystables") operations = [migrations.RemoveField("Pony", "stables")] self.apply_operations("test_rmflmmwt", project_state, operations=operations) def test_remove_field(self): """ Tests the RemoveField operation. """ project_state = self.set_up_test_model("test_rmfl") # Test the state alteration operation = migrations.RemoveField("Pony", "pink") self.assertEqual(operation.describe(), "Remove field pink from Pony") new_state = project_state.clone() operation.state_forwards("test_rmfl", new_state) self.assertEqual(len(new_state.models["test_rmfl", "pony"].fields), 2) # Test the database alteration self.assertColumnExists("test_rmfl_pony", "pink") with connection.schema_editor() as editor: operation.database_forwards("test_rmfl", editor, project_state, new_state) self.assertColumnNotExists("test_rmfl_pony", "pink") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_rmfl", editor, new_state, project_state) self.assertColumnExists("test_rmfl_pony", "pink") def test_remove_fk(self): """ Tests the RemoveField operation on a foreign key. """ project_state = self.set_up_test_model("test_rfk", related_model=True) self.assertColumnExists("test_rfk_rider", "pony_id") operation = migrations.RemoveField("Rider", "pony") new_state = project_state.clone() operation.state_forwards("test_rfk", new_state) with connection.schema_editor() as editor: operation.database_forwards("test_rfk", editor, project_state, new_state) self.assertColumnNotExists("test_rfk_rider", "pony_id") with connection.schema_editor() as editor: operation.database_backwards("test_rfk", editor, new_state, project_state) self.assertColumnExists("test_rfk_rider", "pony_id") def test_alter_model_table(self): """ Tests the AlterModelTable operation. """ project_state = self.set_up_test_model("test_almota") # Test the state alteration operation = migrations.AlterModelTable("Pony", "test_almota_pony_2") self.assertEqual(operation.describe(), "Rename table for Pony to test_almota_pony_2") new_state = project_state.clone() operation.state_forwards("test_almota", new_state) self.assertEqual(new_state.models["test_almota", "pony"].options["db_table"], "test_almota_pony_2") # Test the database alteration self.assertTableExists("test_almota_pony") self.assertTableNotExists("test_almota_pony_2") with connection.schema_editor() as editor: operation.database_forwards("test_almota", editor, project_state, new_state) self.assertTableNotExists("test_almota_pony") self.assertTableExists("test_almota_pony_2") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_almota", editor, new_state, project_state) self.assertTableExists("test_almota_pony") self.assertTableNotExists("test_almota_pony_2") def test_alter_model_table_noop(self): """ Tests the AlterModelTable operation if the table name is not changed. """ project_state = self.set_up_test_model("test_almota") # Test the state alteration operation = migrations.AlterModelTable("Pony", "test_almota_pony") new_state = project_state.clone() operation.state_forwards("test_almota", new_state) self.assertEqual(new_state.models["test_almota", "pony"].options["db_table"], "test_almota_pony") # Test the database alteration self.assertTableExists("test_almota_pony") with connection.schema_editor() as editor: operation.database_forwards("test_almota", editor, project_state, new_state) self.assertTableExists("test_almota_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_almota", editor, new_state, project_state) self.assertTableExists("test_almota_pony") def test_alter_model_table_m2m(self): """ AlterModelTable should rename auto-generated M2M tables. """ app_label = "test_talflmltlm2m" pony_db_table = 'pony_foo' project_state = self.set_up_test_model(app_label, second_model=True, db_table=pony_db_table) # Add the M2M field first_state = project_state.clone() operation = migrations.AddField("Pony", "stables", models.ManyToManyField("Stable")) operation.state_forwards(app_label, first_state) with connection.schema_editor() as editor: operation.database_forwards(app_label, editor, project_state, first_state) original_m2m_table = "%s_%s" % (pony_db_table, "stables") new_m2m_table = "%s_%s" % (app_label, "pony_stables") self.assertTableExists(original_m2m_table) self.assertTableNotExists(new_m2m_table) # Rename the Pony db_table which should also rename the m2m table. second_state = first_state.clone() operation = migrations.AlterModelTable(name='pony', table=None) operation.state_forwards(app_label, second_state) with connection.schema_editor() as editor: operation.database_forwards(app_label, editor, first_state, second_state) self.assertTableExists(new_m2m_table) self.assertTableNotExists(original_m2m_table) # And test reversal with connection.schema_editor() as editor: operation.database_backwards(app_label, editor, second_state, first_state) self.assertTableExists(original_m2m_table) self.assertTableNotExists(new_m2m_table) def test_alter_field(self): """ Tests the AlterField operation. """ project_state = self.set_up_test_model("test_alfl") # Test the state alteration operation = migrations.AlterField("Pony", "pink", models.IntegerField(null=True)) self.assertEqual(operation.describe(), "Alter field pink on Pony") new_state = project_state.clone() operation.state_forwards("test_alfl", new_state) self.assertEqual(project_state.models["test_alfl", "pony"].get_field_by_name("pink").null, False) self.assertEqual(new_state.models["test_alfl", "pony"].get_field_by_name("pink").null, True) # Test the database alteration self.assertColumnNotNull("test_alfl_pony", "pink") with connection.schema_editor() as editor: operation.database_forwards("test_alfl", editor, project_state, new_state) self.assertColumnNull("test_alfl_pony", "pink") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alfl", editor, new_state, project_state) self.assertColumnNotNull("test_alfl_pony", "pink") def test_alter_field_pk(self): """ Tests the AlterField operation on primary keys (for things like PostgreSQL's SERIAL weirdness) """ project_state = self.set_up_test_model("test_alflpk") # Test the state alteration operation = migrations.AlterField("Pony", "id", models.IntegerField(primary_key=True)) new_state = project_state.clone() operation.state_forwards("test_alflpk", new_state) self.assertIsInstance(project_state.models["test_alflpk", "pony"].get_field_by_name("id"), models.AutoField) self.assertIsInstance(new_state.models["test_alflpk", "pony"].get_field_by_name("id"), models.IntegerField) # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_alflpk", editor, project_state, new_state) # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alflpk", editor, new_state, project_state) @unittest.skipUnless(connection.features.supports_foreign_keys, "No FK support") def test_alter_field_pk_fk(self): """ Tests the AlterField operation on primary keys changes any FKs pointing to it. """ project_state = self.set_up_test_model("test_alflpkfk", related_model=True) # Test the state alteration operation = migrations.AlterField("Pony", "id", models.FloatField(primary_key=True)) new_state = project_state.clone() operation.state_forwards("test_alflpkfk", new_state) self.assertIsInstance(project_state.models["test_alflpkfk", "pony"].get_field_by_name("id"), models.AutoField) self.assertIsInstance(new_state.models["test_alflpkfk", "pony"].get_field_by_name("id"), models.FloatField) def assertIdTypeEqualsFkType(): with connection.cursor() as cursor: id_type = [c.type_code for c in connection.introspection.get_table_description(cursor, "test_alflpkfk_pony") if c.name == "id"][0] fk_type = [c.type_code for c in connection.introspection.get_table_description(cursor, "test_alflpkfk_rider") if c.name == "pony_id"][0] self.assertEqual(id_type, fk_type) assertIdTypeEqualsFkType() # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_alflpkfk", editor, project_state, new_state) assertIdTypeEqualsFkType() # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alflpkfk", editor, new_state, project_state) assertIdTypeEqualsFkType() def test_rename_field(self): """ Tests the RenameField operation. """ project_state = self.set_up_test_model("test_rnfl", unique_together=True) # Test the state alteration operation = migrations.RenameField("Pony", "pink", "blue") self.assertEqual(operation.describe(), "Rename field pink on Pony to blue") new_state = project_state.clone() operation.state_forwards("test_rnfl", new_state) self.assertIn("blue", [n for n, f in new_state.models["test_rnfl", "pony"].fields]) self.assertNotIn("pink", [n for n, f in new_state.models["test_rnfl", "pony"].fields]) # Make sure the unique_together has the renamed column too self.assertIn("blue", new_state.models["test_rnfl", "pony"].options['unique_together'][0]) self.assertNotIn("pink", new_state.models["test_rnfl", "pony"].options['unique_together'][0]) # Test the database alteration self.assertColumnExists("test_rnfl_pony", "pink") self.assertColumnNotExists("test_rnfl_pony", "blue") with connection.schema_editor() as editor: operation.database_forwards("test_rnfl", editor, project_state, new_state) self.assertColumnExists("test_rnfl_pony", "blue") self.assertColumnNotExists("test_rnfl_pony", "pink") # Ensure the unique constraint has been ported over with connection.cursor() as cursor: cursor.execute("INSERT INTO test_rnfl_pony (blue, weight) VALUES (1, 1)") with self.assertRaises(IntegrityError): with atomic(): cursor.execute("INSERT INTO test_rnfl_pony (blue, weight) VALUES (1, 1)") cursor.execute("DELETE FROM test_rnfl_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_rnfl", editor, new_state, project_state) self.assertColumnExists("test_rnfl_pony", "pink") self.assertColumnNotExists("test_rnfl_pony", "blue") def test_alter_unique_together(self): """ Tests the AlterUniqueTogether operation. """ project_state = self.set_up_test_model("test_alunto") # Test the state alteration operation = migrations.AlterUniqueTogether("Pony", [("pink", "weight")]) self.assertEqual(operation.describe(), "Alter unique_together for Pony (1 constraint(s))") new_state = project_state.clone() operation.state_forwards("test_alunto", new_state) self.assertEqual(len(project_state.models["test_alunto", "pony"].options.get("unique_together", set())), 0) self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1) # Make sure we can insert duplicate rows with connection.cursor() as cursor: cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") cursor.execute("DELETE FROM test_alunto_pony") # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_alunto", editor, project_state, new_state) cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") with self.assertRaises(IntegrityError): with atomic(): cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") cursor.execute("DELETE FROM test_alunto_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alunto", editor, new_state, project_state) cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") cursor.execute("INSERT INTO test_alunto_pony (pink, weight) VALUES (1, 1)") cursor.execute("DELETE FROM test_alunto_pony") # Test flat unique_together operation = migrations.AlterUniqueTogether("Pony", ("pink", "weight")) operation.state_forwards("test_alunto", new_state) self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1) def test_alter_unique_together_remove(self): operation = migrations.AlterUniqueTogether("Pony", None) self.assertEqual(operation.describe(), "Alter unique_together for Pony (0 constraint(s))") def test_alter_index_together(self): """ Tests the AlterIndexTogether operation. """ project_state = self.set_up_test_model("test_alinto") # Test the state alteration operation = migrations.AlterIndexTogether("Pony", [("pink", "weight")]) self.assertEqual(operation.describe(), "Alter index_together for Pony (1 constraint(s))") new_state = project_state.clone() operation.state_forwards("test_alinto", new_state) self.assertEqual(len(project_state.models["test_alinto", "pony"].options.get("index_together", set())), 0) self.assertEqual(len(new_state.models["test_alinto", "pony"].options.get("index_together", set())), 1) # Make sure there's no matching index self.assertIndexNotExists("test_alinto_pony", ["pink", "weight"]) # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_alinto", editor, project_state, new_state) self.assertIndexExists("test_alinto_pony", ["pink", "weight"]) # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alinto", editor, new_state, project_state) self.assertIndexNotExists("test_alinto_pony", ["pink", "weight"]) def test_alter_index_together_remove(self): operation = migrations.AlterIndexTogether("Pony", None) self.assertEqual(operation.describe(), "Alter index_together for Pony (0 constraint(s))") def test_alter_model_options(self): """ Tests the AlterModelOptions operation. """ project_state = self.set_up_test_model("test_almoop") # Test the state alteration (no DB alteration to test) operation = migrations.AlterModelOptions("Pony", {"permissions": [("can_groom", "Can groom")]}) self.assertEqual(operation.describe(), "Change Meta options on Pony") new_state = project_state.clone() operation.state_forwards("test_almoop", new_state) self.assertEqual(len(project_state.models["test_almoop", "pony"].options.get("permissions", [])), 0) self.assertEqual(len(new_state.models["test_almoop", "pony"].options.get("permissions", [])), 1) self.assertEqual(new_state.models["test_almoop", "pony"].options["permissions"][0][0], "can_groom") def test_alter_model_options_emptying(self): """ Tests that the AlterModelOptions operation removes keys from the dict (#23121) """ project_state = self.set_up_test_model("test_almoop", options=True) # Test the state alteration (no DB alteration to test) operation = migrations.AlterModelOptions("Pony", {}) self.assertEqual(operation.describe(), "Change Meta options on Pony") new_state = project_state.clone() operation.state_forwards("test_almoop", new_state) self.assertEqual(len(project_state.models["test_almoop", "pony"].options.get("permissions", [])), 1) self.assertEqual(len(new_state.models["test_almoop", "pony"].options.get("permissions", [])), 0) def test_alter_order_with_respect_to(self): """ Tests the AlterOrderWithRespectTo operation. """ project_state = self.set_up_test_model("test_alorwrtto", related_model=True) # Test the state alteration operation = migrations.AlterOrderWithRespectTo("Rider", "pony") self.assertEqual(operation.describe(), "Set order_with_respect_to on Rider to pony") new_state = project_state.clone() operation.state_forwards("test_alorwrtto", new_state) self.assertEqual(project_state.models["test_alorwrtto", "rider"].options.get("order_with_respect_to", None), None) self.assertEqual(new_state.models["test_alorwrtto", "rider"].options.get("order_with_respect_to", None), "pony") # Make sure there's no matching index self.assertColumnNotExists("test_alorwrtto_rider", "_order") # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_alorwrtto", editor, project_state, new_state) self.assertColumnExists("test_alorwrtto_rider", "_order") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_alorwrtto", editor, new_state, project_state) self.assertColumnNotExists("test_alorwrtto_rider", "_order") def test_alter_fk(self): """ Tests that creating and then altering an FK works correctly and deals with the pending SQL (#23091) """ project_state = self.set_up_test_model("test_alfk") # Test adding and then altering the FK in one go create_operation = migrations.CreateModel( name="Rider", fields=[ ("id", models.AutoField(primary_key=True)), ("pony", models.ForeignKey(to="Pony")), ], ) create_state = project_state.clone() create_operation.state_forwards("test_alfk", create_state) alter_operation = migrations.AlterField( model_name='Rider', name='pony', field=models.ForeignKey(editable=False, to="Pony"), ) alter_state = create_state.clone() alter_operation.state_forwards("test_alfk", alter_state) with connection.schema_editor() as editor: create_operation.database_forwards("test_alfk", editor, project_state, create_state) alter_operation.database_forwards("test_alfk", editor, create_state, alter_state) def test_alter_fk_non_fk(self): """ Tests that altering an FK to a non-FK works (#23244) """ # Test the state alteration operation = migrations.AlterField( model_name="Rider", name="pony", field=models.FloatField(), ) project_state, new_state = self.make_test_state("test_afknfk", operation, related_model=True) # Test the database alteration self.assertColumnExists("test_afknfk_rider", "pony_id") self.assertColumnNotExists("test_afknfk_rider", "pony") with connection.schema_editor() as editor: operation.database_forwards("test_afknfk", editor, project_state, new_state) self.assertColumnExists("test_afknfk_rider", "pony") self.assertColumnNotExists("test_afknfk_rider", "pony_id") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_afknfk", editor, new_state, project_state) self.assertColumnExists("test_afknfk_rider", "pony_id") self.assertColumnNotExists("test_afknfk_rider", "pony") @unittest.skipIf(sqlparse is None and connection.features.requires_sqlparse_for_splitting, "Missing sqlparse") def test_run_sql(self): """ Tests the RunSQL operation. """ project_state = self.set_up_test_model("test_runsql") # Create the operation operation = migrations.RunSQL( # Use a multi-line string with a comment to test splitting on SQLite and MySQL respectively "CREATE TABLE i_love_ponies (id int, special_thing varchar(15));\n" "INSERT INTO i_love_ponies (id, special_thing) VALUES (1, 'i love ponies'); -- this is magic!\n" "INSERT INTO i_love_ponies (id, special_thing) VALUES (2, 'i love django');\n" "UPDATE i_love_ponies SET special_thing = 'Ponies' WHERE special_thing LIKE '%%ponies';" "UPDATE i_love_ponies SET special_thing = 'Django' WHERE special_thing LIKE '%django';", # Run delete queries to test for parameter substitution failure # reported in #23426 "DELETE FROM i_love_ponies WHERE special_thing LIKE '%Django%';" "DELETE FROM i_love_ponies WHERE special_thing LIKE '%%Ponies%%';" "DROP TABLE i_love_ponies", state_operations=[migrations.CreateModel("SomethingElse", [("id", models.AutoField(primary_key=True))])], ) self.assertEqual(operation.describe(), "Raw SQL operation") # Test the state alteration new_state = project_state.clone() operation.state_forwards("test_runsql", new_state) self.assertEqual(len(new_state.models["test_runsql", "somethingelse"].fields), 1) # Make sure there's no table self.assertTableNotExists("i_love_ponies") # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_runsql", editor, project_state, new_state) self.assertTableExists("i_love_ponies") # Make sure all the SQL was processed with connection.cursor() as cursor: cursor.execute("SELECT COUNT(*) FROM i_love_ponies") self.assertEqual(cursor.fetchall()[0][0], 2) cursor.execute("SELECT COUNT(*) FROM i_love_ponies WHERE special_thing = 'Django'") self.assertEqual(cursor.fetchall()[0][0], 1) cursor.execute("SELECT COUNT(*) FROM i_love_ponies WHERE special_thing = 'Ponies'") self.assertEqual(cursor.fetchall()[0][0], 1) # And test reversal self.assertTrue(operation.reversible) with connection.schema_editor() as editor: operation.database_backwards("test_runsql", editor, new_state, project_state) self.assertTableNotExists("i_love_ponies") def test_run_sql_params(self): """ #23426 - RunSQL should accept parameters. """ project_state = self.set_up_test_model("test_runsql") # Create the operation operation = migrations.RunSQL( ["CREATE TABLE i_love_ponies (id int, special_thing varchar(15));"], ["DROP TABLE i_love_ponies"], ) param_operation = migrations.RunSQL( # forwards ( "INSERT INTO i_love_ponies (id, special_thing) VALUES (1, 'Django');", ["INSERT INTO i_love_ponies (id, special_thing) VALUES (2, %s);", ['Ponies']], ("INSERT INTO i_love_ponies (id, special_thing) VALUES (%s, %s);", (3, 'Python',)), ), # backwards [ "DELETE FROM i_love_ponies WHERE special_thing = 'Django';", ["DELETE FROM i_love_ponies WHERE special_thing = 'Ponies';", None], ("DELETE FROM i_love_ponies WHERE id = %s OR special_thing = %s;", [3, 'Python']), ] ) # Make sure there's no table self.assertTableNotExists("i_love_ponies") new_state = project_state.clone() # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_runsql", editor, project_state, new_state) # Test parameter passing with connection.schema_editor() as editor: param_operation.database_forwards("test_runsql", editor, project_state, new_state) # Make sure all the SQL was processed with connection.cursor() as cursor: cursor.execute("SELECT COUNT(*) FROM i_love_ponies") self.assertEqual(cursor.fetchall()[0][0], 3) with connection.schema_editor() as editor: param_operation.database_backwards("test_runsql", editor, new_state, project_state) with connection.cursor() as cursor: cursor.execute("SELECT COUNT(*) FROM i_love_ponies") self.assertEqual(cursor.fetchall()[0][0], 0) # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_runsql", editor, new_state, project_state) self.assertTableNotExists("i_love_ponies") def test_run_sql_params_invalid(self): """ #23426 - RunSQL should fail when a list of statements with an incorrect number of tuples is given. """ project_state = self.set_up_test_model("test_runsql") new_state = project_state.clone() operation = migrations.RunSQL( # forwards [ ["INSERT INTO foo (bar) VALUES ('buz');"] ], # backwards ( ("DELETE FROM foo WHERE bar = 'buz';", 'invalid', 'parameter count'), ), ) with connection.schema_editor() as editor: self.assertRaisesRegexp(ValueError, "Expected a 2-tuple but got 1", operation.database_forwards, "test_runsql", editor, project_state, new_state) with connection.schema_editor() as editor: self.assertRaisesRegexp(ValueError, "Expected a 2-tuple but got 3", operation.database_backwards, "test_runsql", editor, new_state, project_state) def test_run_python(self): """ Tests the RunPython operation """ project_state = self.set_up_test_model("test_runpython", mti_model=True) # Create the operation def inner_method(models, schema_editor): Pony = models.get_model("test_runpython", "Pony") Pony.objects.create(pink=1, weight=3.55) Pony.objects.create(weight=5) def inner_method_reverse(models, schema_editor): Pony = models.get_model("test_runpython", "Pony") Pony.objects.filter(pink=1, weight=3.55).delete() Pony.objects.filter(weight=5).delete() operation = migrations.RunPython(inner_method, reverse_code=inner_method_reverse) self.assertEqual(operation.describe(), "Raw Python operation") # Test the state alteration does nothing new_state = project_state.clone() operation.state_forwards("test_runpython", new_state) self.assertEqual(new_state, project_state) # Test the database alteration self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 0) with connection.schema_editor() as editor: operation.database_forwards("test_runpython", editor, project_state, new_state) self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 2) # Now test reversal self.assertTrue(operation.reversible) with connection.schema_editor() as editor: operation.database_backwards("test_runpython", editor, project_state, new_state) self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 0) # Now test we can't use a string with self.assertRaises(ValueError): operation = migrations.RunPython("print 'ahahaha'") # Also test reversal fails, with an operation identical to above but without reverse_code set no_reverse_operation = migrations.RunPython(inner_method) self.assertFalse(no_reverse_operation.reversible) with connection.schema_editor() as editor: no_reverse_operation.database_forwards("test_runpython", editor, project_state, new_state) with self.assertRaises(NotImplementedError): no_reverse_operation.database_backwards("test_runpython", editor, new_state, project_state) self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 2) def create_ponies(models, schema_editor): Pony = models.get_model("test_runpython", "Pony") pony1 = Pony.objects.create(pink=1, weight=3.55) self.assertIsNot(pony1.pk, None) pony2 = Pony.objects.create(weight=5) self.assertIsNot(pony2.pk, None) self.assertNotEqual(pony1.pk, pony2.pk) operation = migrations.RunPython(create_ponies) with connection.schema_editor() as editor: operation.database_forwards("test_runpython", editor, project_state, new_state) self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 4) def create_shetlandponies(models, schema_editor): ShetlandPony = models.get_model("test_runpython", "ShetlandPony") pony1 = ShetlandPony.objects.create(weight=4.0) self.assertIsNot(pony1.pk, None) pony2 = ShetlandPony.objects.create(weight=5.0) self.assertIsNot(pony2.pk, None) self.assertNotEqual(pony1.pk, pony2.pk) operation = migrations.RunPython(create_shetlandponies) with connection.schema_editor() as editor: operation.database_forwards("test_runpython", editor, project_state, new_state) self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 6) self.assertEqual(project_state.render().get_model("test_runpython", "ShetlandPony").objects.count(), 2) def test_run_python_atomic(self): """ Tests the RunPython operation correctly handles the "atomic" keyword """ project_state = self.set_up_test_model("test_runpythonatomic", mti_model=True) def inner_method(models, schema_editor): Pony = models.get_model("test_runpythonatomic", "Pony") Pony.objects.create(pink=1, weight=3.55) raise ValueError("Adrian hates ponies.") atomic_migration = Migration("test", "test_runpythonatomic") atomic_migration.operations = [migrations.RunPython(inner_method)] non_atomic_migration = Migration("test", "test_runpythonatomic") non_atomic_migration.operations = [migrations.RunPython(inner_method, atomic=False)] # If we're a fully-transactional database, both versions should rollback if connection.features.can_rollback_ddl: self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 0) with self.assertRaises(ValueError): with connection.schema_editor() as editor: atomic_migration.apply(project_state, editor) self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 0) with self.assertRaises(ValueError): with connection.schema_editor() as editor: non_atomic_migration.apply(project_state, editor) self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 0) # Otherwise, the non-atomic operation should leave a row there else: self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 0) with self.assertRaises(ValueError): with connection.schema_editor() as editor: atomic_migration.apply(project_state, editor) self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 0) with self.assertRaises(ValueError): with connection.schema_editor() as editor: non_atomic_migration.apply(project_state, editor) self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 1) @unittest.skipIf(sqlparse is None and connection.features.requires_sqlparse_for_splitting, "Missing sqlparse") def test_separate_database_and_state(self): """ Tests the SeparateDatabaseAndState operation. """ project_state = self.set_up_test_model("test_separatedatabaseandstate") # Create the operation database_operation = migrations.RunSQL( "CREATE TABLE i_love_ponies (id int, special_thing int);", "DROP TABLE i_love_ponies;" ) state_operation = migrations.CreateModel("SomethingElse", [("id", models.AutoField(primary_key=True))]) operation = migrations.SeparateDatabaseAndState( state_operations=[state_operation], database_operations=[database_operation] ) self.assertEqual(operation.describe(), "Custom state/database change combination") # Test the state alteration new_state = project_state.clone() operation.state_forwards("test_separatedatabaseandstate", new_state) self.assertEqual(len(new_state.models["test_separatedatabaseandstate", "somethingelse"].fields), 1) # Make sure there's no table self.assertTableNotExists("i_love_ponies") # Test the database alteration with connection.schema_editor() as editor: operation.database_forwards("test_separatedatabaseandstate", editor, project_state, new_state) self.assertTableExists("i_love_ponies") # And test reversal self.assertTrue(operation.reversible) with connection.schema_editor() as editor: operation.database_backwards("test_separatedatabaseandstate", editor, new_state, project_state) self.assertTableNotExists("i_love_ponies") class MigrateNothingRouter(object): """ A router that sends all writes to the other database. """ def allow_migrate(self, db, model): return False class MultiDBOperationTests(MigrationTestBase): multi_db = True def setUp(self): # Make the 'other' database appear to be a replica of the 'default' self.old_routers = router.routers router.routers = [MigrateNothingRouter()] def tearDown(self): # Restore the 'other' database as an independent database router.routers = self.old_routers def test_create_model(self): """ Tests that CreateModel honours multi-db settings. """ operation = migrations.CreateModel( "Pony", [ ("id", models.AutoField(primary_key=True)), ("pink", models.IntegerField(default=1)), ], ) # Test the state alteration project_state = ProjectState() new_state = project_state.clone() operation.state_forwards("test_crmo", new_state) # Test the database alteration self.assertTableNotExists("test_crmo_pony") with connection.schema_editor() as editor: operation.database_forwards("test_crmo", editor, project_state, new_state) self.assertTableNotExists("test_crmo_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crmo", editor, new_state, project_state) self.assertTableNotExists("test_crmo_pony") class SwappableOperationTests(OperationTestBase): """ Tests that key operations ignore swappable models (we don't want to replicate all of them here, as the functionality is in a common base class anyway) """ available_apps = [ "migrations", "django.contrib.auth", "django.contrib.contenttypes", ] @override_settings(TEST_SWAP_MODEL="migrations.SomeFakeModel") def test_create_ignore_swapped(self): """ Tests that the CreateTable operation ignores swapped models. """ operation = migrations.CreateModel( "Pony", [ ("id", models.AutoField(primary_key=True)), ("pink", models.IntegerField(default=1)), ], options={ "swappable": "TEST_SWAP_MODEL", }, ) # Test the state alteration (it should still be there!) project_state = ProjectState() new_state = project_state.clone() operation.state_forwards("test_crigsw", new_state) self.assertEqual(new_state.models["test_crigsw", "pony"].name, "Pony") self.assertEqual(len(new_state.models["test_crigsw", "pony"].fields), 2) # Test the database alteration self.assertTableNotExists("test_crigsw_pony") with connection.schema_editor() as editor: operation.database_forwards("test_crigsw", editor, project_state, new_state) self.assertTableNotExists("test_crigsw_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_crigsw", editor, new_state, project_state) self.assertTableNotExists("test_crigsw_pony") @override_settings(TEST_SWAP_MODEL="migrations.SomeFakeModel") def test_delete_ignore_swapped(self): """ Tests the DeleteModel operation ignores swapped models. """ operation = migrations.DeleteModel("Pony") project_state, new_state = self.make_test_state("test_dligsw", operation) # Test the database alteration self.assertTableNotExists("test_dligsw_pony") with connection.schema_editor() as editor: operation.database_forwards("test_dligsw", editor, project_state, new_state) self.assertTableNotExists("test_dligsw_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_dligsw", editor, new_state, project_state) self.assertTableNotExists("test_dligsw_pony") @override_settings(TEST_SWAP_MODEL="migrations.SomeFakeModel") def test_add_field_ignore_swapped(self): """ Tests the AddField operation. """ # Test the state alteration operation = migrations.AddField( "Pony", "height", models.FloatField(null=True, default=5), ) project_state, new_state = self.make_test_state("test_adfligsw", operation) # Test the database alteration self.assertTableNotExists("test_adfligsw_pony") with connection.schema_editor() as editor: operation.database_forwards("test_adfligsw", editor, project_state, new_state) self.assertTableNotExists("test_adfligsw_pony") # And test reversal with connection.schema_editor() as editor: operation.database_backwards("test_adfligsw", editor, new_state, project_state) self.assertTableNotExists("test_adfligsw_pony")