django/tests/migrations/test_operations.py

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from __future__ import unicode_literals
import unittest
try:
import sqlparse
except ImportError:
sqlparse = None
from django import test
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
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class OperationTests(MigrationTestBase):
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"""
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 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 set_up_test_model(self, app_label, second_model=False, third_model=False, related_model=False, mti_model=False, proxy_model=False):
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"""
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
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# Make the "current" state
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operations = [migrations.CreateModel(
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"Pony",
[
("id", models.AutoField(primary_key=True)),
("pink", models.IntegerField(default=3)),
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("weight", models.FloatField()),
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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)),
]
))
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")),
],
))
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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)
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def test_create_model(self):
"""
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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"""
operation = migrations.CreateModel(
"Pony",
[
("id", models.AutoField(primary_key=True)),
("pink", models.IntegerField(default=1)),
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],
)
# Test the state alteration
project_state = ProjectState()
new_state = project_state.clone()
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)
# 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")
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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,
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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",
[],
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options={"proxy": True},
bases=("test_crprmo.Pony", ),
)
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")
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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")
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")
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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")
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"))
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def test_add_field(self):
"""
Tests the AddField operation.
"""
project_state = self.set_up_test_model("test_adfl")
# Test the state alteration
operation = migrations.AddField(
"Pony",
"height",
models.FloatField(null=True, default=5),
)
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new_state = project_state.clone()
operation.state_forwards("test_adfl", new_state)
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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)
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# 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")
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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"),
),
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# 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")
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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"),
),
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# 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")
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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"),
),
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# 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")
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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),
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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")
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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"))
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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
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with atomic():
new_apps = new_state.render()
Pony = new_apps.get_model("test_adflmm", "Pony")
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p = Pony.objects.create(pink=False, weight=4.55)
p.stables.create()
self.assertEqual(p.stables.count(), 1)
p.stables.all().delete()
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# 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)
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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")
new_state = project_state.clone()
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
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")
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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")
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_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))
new_state = project_state.clone()
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)
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")
# Test the state alteration
operation = migrations.RenameField("Pony", "pink", "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])
# 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")
# 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")
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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")])
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)
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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")])
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_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")]})
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_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")
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")
@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 commment to test splitting on SQLite and MySQL respectively
"CREATE TABLE i_love_ponies (id int, special_thing int);\n"
"INSERT INTO i_love_ponies (id, special_thing) VALUES (1, 42); -- this is magic!\n"
"INSERT INTO i_love_ponies (id, special_thing) VALUES (2, 51);\n",
"DROP TABLE i_love_ponies",
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state_operations=[migrations.CreateModel("SomethingElse", [("id", models.AutoField(primary_key=True))])],
)
# 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)
# 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_python(self):
"""
Tests the RunPython operation
"""
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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)
# 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)
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self.assertEqual(project_state.render().get_model("test_runpython", "Pony").objects.count(), 2)
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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)
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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.")
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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)
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")