400 lines
18 KiB
Python
400 lines
18 KiB
Python
from django.db import connection, models, migrations, router
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from django.db.transaction import atomic
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from django.db.utils import IntegrityError
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from django.db.migrations.state import ProjectState
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from .test_base import MigrationTestBase
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class OperationTests(MigrationTestBase):
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"""
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Tests running the operations and making sure they do what they say they do.
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Each test looks at their state changing, and then their database operation -
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both forwards and backwards.
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"""
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def set_up_test_model(self, app_label, second_model=False):
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"""
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Creates a test model state and database table.
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"""
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# Delete the tables if they already exist
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cursor = connection.cursor()
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try:
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cursor.execute("DROP TABLE %s_pony" % app_label)
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except:
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pass
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try:
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cursor.execute("DROP TABLE %s_stable" % app_label)
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except:
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pass
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# Make the "current" state
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operations = [migrations.CreateModel(
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"Pony",
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[
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("id", models.AutoField(primary_key=True)),
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("pink", models.IntegerField(default=3)),
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("weight", models.FloatField()),
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],
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)]
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if second_model:
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operations.append(migrations.CreateModel("Stable", [("id", models.AutoField(primary_key=True))]))
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project_state = ProjectState()
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for operation in operations:
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operation.state_forwards(app_label, project_state)
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# Set up the database
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with connection.schema_editor() as editor:
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for operation in operations:
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operation.database_forwards(app_label, editor, ProjectState(), project_state)
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return project_state
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def test_create_model(self):
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"""
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Tests the CreateModel operation.
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Most other tests use this operation as part of setup, so check failures here first.
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"""
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operation = migrations.CreateModel(
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"Pony",
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[
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("id", models.AutoField(primary_key=True)),
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("pink", models.IntegerField(default=1)),
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],
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)
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# Test the state alteration
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project_state = ProjectState()
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new_state = project_state.clone()
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operation.state_forwards("test_crmo", new_state)
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self.assertEqual(new_state.models["test_crmo", "pony"].name, "Pony")
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self.assertEqual(len(new_state.models["test_crmo", "pony"].fields), 2)
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# Test the database alteration
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self.assertTableNotExists("test_crmo_pony")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_crmo", editor, project_state, new_state)
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self.assertTableExists("test_crmo_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_crmo", editor, new_state, project_state)
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self.assertTableNotExists("test_crmo_pony")
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# And deconstruction
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definition = operation.deconstruct()
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self.assertEqual(definition[0], "CreateModel")
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self.assertEqual(len(definition[1]), 2)
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self.assertEqual(len(definition[2]), 0)
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self.assertEqual(definition[1][0], "Pony")
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def test_delete_model(self):
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"""
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Tests the DeleteModel operation.
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"""
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project_state = self.set_up_test_model("test_dlmo")
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# Test the state alteration
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operation = migrations.DeleteModel("Pony")
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new_state = project_state.clone()
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operation.state_forwards("test_dlmo", new_state)
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self.assertNotIn(("test_dlmo", "pony"), new_state.models)
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# Test the database alteration
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self.assertTableExists("test_dlmo_pony")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_dlmo", editor, project_state, new_state)
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self.assertTableNotExists("test_dlmo_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_dlmo", editor, new_state, project_state)
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self.assertTableExists("test_dlmo_pony")
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def test_add_field(self):
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"""
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Tests the AddField operation.
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"""
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project_state = self.set_up_test_model("test_adfl")
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# Test the state alteration
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operation = migrations.AddField("Pony", "height", models.FloatField(null=True))
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new_state = project_state.clone()
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operation.state_forwards("test_adfl", new_state)
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self.assertEqual(len(new_state.models["test_adfl", "pony"].fields), 4)
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# Test the database alteration
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self.assertColumnNotExists("test_adfl_pony", "height")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_adfl", editor, project_state, new_state)
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self.assertColumnExists("test_adfl_pony", "height")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_adfl", editor, new_state, project_state)
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self.assertColumnNotExists("test_adfl_pony", "height")
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def test_add_field_m2m(self):
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"""
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Tests the AddField operation with a ManyToManyField.
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"""
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project_state = self.set_up_test_model("test_adflmm", second_model=True)
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# Test the state alteration
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operation = migrations.AddField("Pony", "stables", models.ManyToManyField("Stable", related_name="ponies"))
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new_state = project_state.clone()
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operation.state_forwards("test_adflmm", new_state)
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self.assertEqual(len(new_state.models["test_adflmm", "pony"].fields), 4)
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# Test the database alteration
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self.assertTableNotExists("test_adflmm_pony_stables")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_adflmm", editor, project_state, new_state)
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self.assertTableExists("test_adflmm_pony_stables")
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self.assertColumnNotExists("test_adflmm_pony", "stables")
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# Make sure the M2M field actually works
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with atomic():
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app_cache = new_state.render()
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Pony = app_cache.get_model("test_adflmm", "Pony")
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p = Pony.objects.create(pink=False, weight=4.55)
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p.stables.create()
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self.assertEqual(p.stables.count(), 1)
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p.stables.all().delete()
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_adflmm", editor, new_state, project_state)
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self.assertTableNotExists("test_adflmm_pony_stables")
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def test_remove_field(self):
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"""
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Tests the RemoveField operation.
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"""
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project_state = self.set_up_test_model("test_rmfl")
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# Test the state alteration
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operation = migrations.RemoveField("Pony", "pink")
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new_state = project_state.clone()
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operation.state_forwards("test_rmfl", new_state)
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self.assertEqual(len(new_state.models["test_rmfl", "pony"].fields), 2)
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# Test the database alteration
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self.assertColumnExists("test_rmfl_pony", "pink")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_rmfl", editor, project_state, new_state)
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self.assertColumnNotExists("test_rmfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_rmfl", editor, new_state, project_state)
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self.assertColumnExists("test_rmfl_pony", "pink")
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def test_alter_model_table(self):
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"""
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Tests the AlterModelTable operation.
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"""
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project_state = self.set_up_test_model("test_almota")
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# Test the state alteration
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operation = migrations.AlterModelTable("Pony", "test_almota_pony_2")
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new_state = project_state.clone()
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operation.state_forwards("test_almota", new_state)
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self.assertEqual(new_state.models["test_almota", "pony"].options["db_table"], "test_almota_pony_2")
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# Test the database alteration
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self.assertTableExists("test_almota_pony")
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self.assertTableNotExists("test_almota_pony_2")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_almota", editor, project_state, new_state)
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self.assertTableNotExists("test_almota_pony")
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self.assertTableExists("test_almota_pony_2")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_almota", editor, new_state, project_state)
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self.assertTableExists("test_almota_pony")
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self.assertTableNotExists("test_almota_pony_2")
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def test_alter_field(self):
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"""
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Tests the AlterField operation.
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"""
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project_state = self.set_up_test_model("test_alfl")
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# Test the state alteration
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operation = migrations.AlterField("Pony", "pink", models.IntegerField(null=True))
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new_state = project_state.clone()
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operation.state_forwards("test_alfl", new_state)
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self.assertEqual(project_state.models["test_alfl", "pony"].get_field_by_name("pink").null, False)
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self.assertEqual(new_state.models["test_alfl", "pony"].get_field_by_name("pink").null, True)
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# Test the database alteration
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self.assertColumnNotNull("test_alfl_pony", "pink")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_alfl", editor, project_state, new_state)
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self.assertColumnNull("test_alfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_alfl", editor, new_state, project_state)
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self.assertColumnNotNull("test_alfl_pony", "pink")
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def test_rename_field(self):
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"""
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Tests the RenameField operation.
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"""
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project_state = self.set_up_test_model("test_rnfl")
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# Test the state alteration
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operation = migrations.RenameField("Pony", "pink", "blue")
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new_state = project_state.clone()
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operation.state_forwards("test_rnfl", new_state)
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self.assertIn("blue", [n for n, f in new_state.models["test_rnfl", "pony"].fields])
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self.assertNotIn("pink", [n for n, f in new_state.models["test_rnfl", "pony"].fields])
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# Test the database alteration
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self.assertColumnExists("test_rnfl_pony", "pink")
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self.assertColumnNotExists("test_rnfl_pony", "blue")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_rnfl", editor, project_state, new_state)
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self.assertColumnExists("test_rnfl_pony", "blue")
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self.assertColumnNotExists("test_rnfl_pony", "pink")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_rnfl", editor, new_state, project_state)
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self.assertColumnExists("test_rnfl_pony", "pink")
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self.assertColumnNotExists("test_rnfl_pony", "blue")
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def test_alter_unique_together(self):
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"""
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Tests the AlterUniqueTogether operation.
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"""
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project_state = self.set_up_test_model("test_alunto")
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# Test the state alteration
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operation = migrations.AlterUniqueTogether("Pony", [("pink", "weight")])
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new_state = project_state.clone()
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operation.state_forwards("test_alunto", new_state)
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self.assertEqual(len(project_state.models["test_alunto", "pony"].options.get("unique_together", set())), 0)
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self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1)
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# Make sure we can insert duplicate rows
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cursor = connection.cursor()
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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# Test the database alteration
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with connection.schema_editor() as editor:
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operation.database_forwards("test_alunto", editor, project_state, new_state)
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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with self.assertRaises(IntegrityError):
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with atomic():
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_alunto", editor, new_state, project_state)
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
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cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
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cursor.execute("DELETE FROM test_alunto_pony")
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def test_alter_index_together(self):
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"""
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Tests the AlterIndexTogether operation.
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"""
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project_state = self.set_up_test_model("test_alinto")
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# Test the state alteration
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operation = migrations.AlterIndexTogether("Pony", [("pink", "weight")])
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new_state = project_state.clone()
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operation.state_forwards("test_alinto", new_state)
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self.assertEqual(len(project_state.models["test_alinto", "pony"].options.get("index_together", set())), 0)
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self.assertEqual(len(new_state.models["test_alinto", "pony"].options.get("index_together", set())), 1)
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# Make sure there's no matching index
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self.assertIndexNotExists("test_alinto_pony", ["pink", "weight"])
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# Test the database alteration
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with connection.schema_editor() as editor:
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operation.database_forwards("test_alinto", editor, project_state, new_state)
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self.assertIndexExists("test_alinto_pony", ["pink", "weight"])
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_alinto", editor, new_state, project_state)
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self.assertIndexNotExists("test_alinto_pony", ["pink", "weight"])
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def test_run_sql(self):
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"""
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Tests the RunSQL operation.
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"""
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project_state = self.set_up_test_model("test_runsql")
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# Create the operation
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operation = migrations.RunSQL(
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"CREATE TABLE i_love_ponies (id int, special_thing int)",
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"DROP TABLE i_love_ponies",
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state_operations = [migrations.CreateModel("SomethingElse", [("id", models.AutoField(primary_key=True))])],
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)
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# Test the state alteration
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new_state = project_state.clone()
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operation.state_forwards("test_runsql", new_state)
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self.assertEqual(len(new_state.models["test_runsql", "somethingelse"].fields), 1)
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# Make sure there's no table
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self.assertTableNotExists("i_love_ponies")
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# Test the database alteration
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with connection.schema_editor() as editor:
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operation.database_forwards("test_runsql", editor, project_state, new_state)
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self.assertTableExists("i_love_ponies")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_runsql", editor, new_state, project_state)
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self.assertTableNotExists("i_love_ponies")
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def test_run_python(self):
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"""
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Tests the RunPython operation
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"""
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project_state = self.set_up_test_model("test_runpython")
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# Create the operation
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operation = migrations.RunPython(
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"""
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Pony = models.get_model("test_runpython", "Pony")
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Pony.objects.create(pink=2, weight=4.55)
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Pony.objects.create(weight=1)
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""",
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)
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# Test the state alteration does nothing
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new_state = project_state.clone()
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operation.state_forwards("test_runpython", new_state)
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self.assertEqual(new_state, project_state)
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# Test the database alteration
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self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 0)
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with connection.schema_editor() as editor:
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operation.database_forwards("test_runpython", editor, project_state, new_state)
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self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 2)
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# And test reversal fails
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with self.assertRaises(NotImplementedError):
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operation.database_backwards("test_runpython", None, new_state, project_state)
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# Now test we can do it with a callable
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def inner_method(models, schema_editor):
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Pony = models.get_model("test_runpython", "Pony")
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Pony.objects.create(pink=1, weight=3.55)
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Pony.objects.create(weight=5)
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operation = migrations.RunPython(inner_method)
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with connection.schema_editor() as editor:
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operation.database_forwards("test_runpython", editor, project_state, new_state)
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self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 4)
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class MigrateNothingRouter(object):
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"""
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A router that sends all writes to the other database.
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"""
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def allow_migrate(self, db, model):
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return False
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class MultiDBOperationTests(MigrationTestBase):
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multi_db = True
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def setUp(self):
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# Make the 'other' database appear to be a slave of the 'default'
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self.old_routers = router.routers
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router.routers = [MigrateNothingRouter()]
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def tearDown(self):
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# Restore the 'other' database as an independent database
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router.routers = self.old_routers
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def test_create_model(self):
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"""
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Tests that CreateModel honours multi-db settings.
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"""
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operation = migrations.CreateModel(
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"Pony",
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[
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("id", models.AutoField(primary_key=True)),
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("pink", models.IntegerField(default=1)),
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],
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)
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# Test the state alteration
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project_state = ProjectState()
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new_state = project_state.clone()
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operation.state_forwards("test_crmo", new_state)
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# Test the database alteration
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self.assertTableNotExists("test_crmo_pony")
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with connection.schema_editor() as editor:
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operation.database_forwards("test_crmo", editor, project_state, new_state)
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self.assertTableNotExists("test_crmo_pony")
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# And test reversal
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with connection.schema_editor() as editor:
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operation.database_backwards("test_crmo", editor, new_state, project_state)
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self.assertTableNotExists("test_crmo_pony")
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