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django/tests/migrations/test_commands.py
2014-06-23 09:59:36 -04:00

496 lines
22 KiB
Python

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import codecs
import os
import shutil
from django.apps import apps
from django.db import models
from django.core.management import call_command, CommandError
from django.db.migrations import questioner
from django.test import override_settings, override_system_checks
from django.utils import six
from django.utils._os import upath
from django.utils.encoding import force_text
from .models import UnicodeModel, UnserializableModel
from .test_base import MigrationTestBase
class MigrateTests(MigrationTestBase):
"""
Tests running the migrate command.
"""
# `auth` app is imported, but not installed in these tests (thanks to
# MigrationTestBase), so we need to exclude checks registered by this app.
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_migrate(self):
"""
Tests basic usage of the migrate command.
"""
# Make sure no tables are created
self.assertTableNotExists("migrations_author")
self.assertTableNotExists("migrations_tribble")
self.assertTableNotExists("migrations_book")
# Run the migrations to 0001 only
call_command("migrate", "migrations", "0001", verbosity=0)
# Make sure the right tables exist
self.assertTableExists("migrations_author")
self.assertTableExists("migrations_tribble")
self.assertTableNotExists("migrations_book")
# Run migrations all the way
call_command("migrate", verbosity=0)
# Make sure the right tables exist
self.assertTableExists("migrations_author")
self.assertTableNotExists("migrations_tribble")
self.assertTableExists("migrations_book")
# Unmigrate everything
call_command("migrate", "migrations", "zero", verbosity=0)
# Make sure it's all gone
self.assertTableNotExists("migrations_author")
self.assertTableNotExists("migrations_tribble")
self.assertTableNotExists("migrations_book")
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_migrate_list(self):
"""
Tests --list output of migrate command
"""
stdout = six.StringIO()
call_command("migrate", list=True, stdout=stdout, verbosity=0)
self.assertIn("migrations", stdout.getvalue().lower())
self.assertIn("[ ] 0001_initial", stdout.getvalue().lower())
self.assertIn("[ ] 0002_second", stdout.getvalue().lower())
call_command("migrate", "migrations", "0001", verbosity=0)
stdout = six.StringIO()
# Giving the explicit app_label tests for selective `show_migration_list` in the command
call_command("migrate", "migrations", list=True, stdout=stdout, verbosity=0)
self.assertIn("migrations", stdout.getvalue().lower())
self.assertIn("[x] 0001_initial", stdout.getvalue().lower())
self.assertIn("[ ] 0002_second", stdout.getvalue().lower())
# Cleanup by unmigrating everything
call_command("migrate", "migrations", "zero", verbosity=0)
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_migrate_conflict_exit(self):
"""
Makes sure that migrate exits if it detects a conflict.
"""
with self.assertRaises(CommandError):
call_command("migrate", "migrations")
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_sqlmigrate(self):
"""
Makes sure that sqlmigrate does something.
"""
# Test forwards. All the databases agree on CREATE TABLE, at least.
stdout = six.StringIO()
call_command("sqlmigrate", "migrations", "0001", stdout=stdout)
self.assertIn("create table", stdout.getvalue().lower())
# Cannot generate the reverse SQL unless we've applied the migration.
call_command("migrate", "migrations", verbosity=0)
# And backwards is a DROP TABLE
stdout = six.StringIO()
call_command("sqlmigrate", "migrations", "0001", stdout=stdout, backwards=True)
self.assertIn("drop table", stdout.getvalue().lower())
# Cleanup by unmigrating everything
call_command("migrate", "migrations", "zero", verbosity=0)
@override_system_checks([])
@override_settings(
INSTALLED_APPS=[
"migrations.migrations_test_apps.migrated_app",
"migrations.migrations_test_apps.migrated_unapplied_app",
"migrations.migrations_test_apps.unmigrated_app"])
def test_regression_22823_unmigrated_fk_to_migrated_model(self):
"""
https://code.djangoproject.com/ticket/22823
Assuming you have 3 apps, `A`, `B`, and `C`, such that:
* `A` has migrations
* `B` has a migration we want to apply
* `C` has no migrations, but has an FK to `A`
When we try to migrate "B", an exception occurs because the
"B" was not included in the ProjectState that is used to detect
soft-applied migrations.
"""
stdout = six.StringIO()
call_command("migrate", "migrated_unapplied_app", stdout=stdout)
class MakeMigrationsTests(MigrationTestBase):
"""
Tests running the makemigrations command.
"""
# Because the `import_module` performed in `MigrationLoader` will cache
# the migrations package, we can't reuse the same migration package
# between tests. This is only a problem for testing, since `makemigrations`
# is normally called in its own process.
creation_counter = 0
def setUp(self):
MakeMigrationsTests.creation_counter += 1
self._cwd = os.getcwd()
self.test_dir = os.path.abspath(os.path.dirname(upath(__file__)))
self.migration_dir = os.path.join(self.test_dir, 'migrations_%d' % self.creation_counter)
self.migration_pkg = "migrations.migrations_%d" % self.creation_counter
self._old_models = apps.app_configs['migrations'].models.copy()
def tearDown(self):
apps.app_configs['migrations'].models = self._old_models
apps.all_models['migrations'] = self._old_models
apps.clear_cache()
os.chdir(self.test_dir)
try:
self._rmrf(self.migration_dir)
except OSError:
pass
try:
self._rmrf(os.path.join(self.test_dir,
"test_migrations_path_doesnt_exist"))
except OSError:
pass
os.chdir(self._cwd)
def _rmrf(self, dname):
if os.path.commonprefix([self.test_dir, os.path.abspath(dname)]) != self.test_dir:
return
shutil.rmtree(dname)
# `auth` app is imported, but not installed in this test (thanks to
# MigrationTestBase), so we need to exclude checks registered by this app.
@override_system_checks([])
def test_files_content(self):
self.assertTableNotExists("migrations_unicodemodel")
apps.register_model('migrations', UnicodeModel)
with override_settings(MIGRATION_MODULES={"migrations": self.migration_pkg}):
call_command("makemigrations", "migrations", verbosity=0)
init_file = os.path.join(self.migration_dir, "__init__.py")
# Check for existing __init__.py file in migrations folder
self.assertTrue(os.path.exists(init_file))
with open(init_file, 'r') as fp:
content = force_text(fp.read())
self.assertEqual(content, '')
initial_file = os.path.join(self.migration_dir, "0001_initial.py")
# Check for existing 0001_initial.py file in migration folder
self.assertTrue(os.path.exists(initial_file))
with codecs.open(initial_file, 'r', encoding='utf-8') as fp:
content = fp.read()
self.assertTrue('# -*- coding: utf-8 -*-' in content)
self.assertTrue('migrations.CreateModel' in content)
if six.PY3:
self.assertTrue('úñí©óðé µóðéø' in content) # Meta.verbose_name
self.assertTrue('úñí©óðé µóðéøß' in content) # Meta.verbose_name_plural
self.assertTrue('ÚÑÍ¢ÓÐÉ' in content) # title.verbose_name
self.assertTrue('“Ðjáñgó”' in content) # title.default
else:
self.assertTrue('\\xfa\\xf1\\xed\\xa9\\xf3\\xf0\\xe9 \\xb5\\xf3\\xf0\\xe9\\xf8' in content) # Meta.verbose_name
self.assertTrue('\\xfa\\xf1\\xed\\xa9\\xf3\\xf0\\xe9 \\xb5\\xf3\\xf0\\xe9\\xf8\\xdf' in content) # Meta.verbose_name_plural
self.assertTrue('\\xda\\xd1\\xcd\\xa2\\xd3\\xd0\\xc9' in content) # title.verbose_name
self.assertTrue('\\u201c\\xd0j\\xe1\\xf1g\\xf3\\u201d' in content) # title.default
# `auth` app is imported, but not installed in this test (thanks to
# MigrationTestBase), so we need to exclude checks registered by this app.
@override_system_checks([])
def test_failing_migration(self):
#21280 - If a migration fails to serialize, it shouldn't generate an empty file.
apps.register_model('migrations', UnserializableModel)
with six.assertRaisesRegex(self, ValueError, r'Cannot serialize'):
with override_settings(MIGRATION_MODULES={"migrations": self.migration_pkg}):
call_command("makemigrations", "migrations", verbosity=0)
initial_file = os.path.join(self.migration_dir, "0001_initial.py")
self.assertFalse(os.path.exists(initial_file))
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_makemigrations_conflict_exit(self):
"""
Makes sure that makemigrations exits if it detects a conflict.
"""
with self.assertRaises(CommandError):
call_command("makemigrations")
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_makemigrations_merge_no_conflict(self):
"""
Makes sure that makemigrations exits if in merge mode with no conflicts.
"""
stdout = six.StringIO()
try:
call_command("makemigrations", merge=True, stdout=stdout)
except CommandError:
self.fail("Makemigrations errored in merge mode with no conflicts")
self.assertIn("No conflicts detected to merge.", stdout.getvalue())
@override_system_checks([])
def test_makemigrations_no_app_sys_exit(self):
"""
Makes sure that makemigrations exits if a non-existent app is specified.
"""
stderr = six.StringIO()
with self.assertRaises(SystemExit):
call_command("makemigrations", "this_app_does_not_exist", stderr=stderr)
self.assertIn("'this_app_does_not_exist' could not be found.", stderr.getvalue())
@override_system_checks([])
def test_makemigrations_empty_no_app_specified(self):
"""
Makes sure that makemigrations exits if no app is specified with 'empty' mode.
"""
with override_settings(MIGRATION_MODULES={"migrations": self.migration_pkg}):
self.assertRaises(CommandError, call_command, "makemigrations", empty=True)
@override_system_checks([])
def test_makemigrations_empty_migration(self):
"""
Makes sure that makemigrations properly constructs an empty migration.
"""
with override_settings(MIGRATION_MODULES={"migrations": self.migration_pkg}):
try:
call_command("makemigrations", "migrations", empty=True, verbosity=0)
except CommandError:
self.fail("Makemigrations errored in creating empty migration for a proper app.")
initial_file = os.path.join(self.migration_dir, "0001_initial.py")
# Check for existing 0001_initial.py file in migration folder
self.assertTrue(os.path.exists(initial_file))
with codecs.open(initial_file, 'r', encoding='utf-8') as fp:
content = fp.read()
self.assertTrue('# -*- coding: utf-8 -*-' in content)
# Remove all whitespace to check for empty dependencies and operations
content = content.replace(' ', '')
self.assertIn('dependencies=[\n]', content)
self.assertIn('operations=[\n]', content)
@override_system_checks([])
def test_makemigrations_no_changes_no_apps(self):
"""
Makes sure that makemigrations exits when there are no changes and no apps are specified.
"""
stdout = six.StringIO()
call_command("makemigrations", stdout=stdout)
self.assertIn("No changes detected", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_no_changes"})
def test_makemigrations_no_changes(self):
"""
Makes sure that makemigrations exits when there are no changes to an app.
"""
stdout = six.StringIO()
call_command("makemigrations", "migrations", stdout=stdout)
self.assertIn("No changes detected in app 'migrations'", stdout.getvalue())
@override_system_checks([])
def test_makemigrations_migrations_announce(self):
"""
Makes sure that makemigrations announces the migration at the default verbosity level.
"""
stdout = six.StringIO()
with override_settings(MIGRATION_MODULES={"migrations": self.migration_pkg}):
call_command("makemigrations", "migrations", stdout=stdout)
self.assertIn("Migrations for 'migrations'", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_no_ancestor"})
def test_makemigrations_no_common_ancestor(self):
"""
Makes sure that makemigrations fails to merge migrations with no common ancestor.
"""
with self.assertRaises(ValueError) as context:
call_command("makemigrations", "migrations", merge=True)
exception_message = str(context.exception)
self.assertIn("Could not find common ancestor of", exception_message)
self.assertIn("0002_second", exception_message)
self.assertIn("0002_conflicting_second", exception_message)
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_makemigrations_interactive_reject(self):
"""
Makes sure that makemigrations enters and exits interactive mode properly.
"""
# Monkeypatch interactive questioner to auto reject
old_input = questioner.input
questioner.input = lambda _: "N"
try:
call_command("makemigrations", "migrations", merge=True, interactive=True, verbosity=0)
merge_file = os.path.join(self.test_dir, 'test_migrations_conflict', '0003_merge.py')
self.assertFalse(os.path.exists(merge_file))
except CommandError:
self.fail("Makemigrations failed while running interactive questioner")
finally:
questioner.input = old_input
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_makemigrations_interactive_accept(self):
"""
Makes sure that makemigrations enters interactive mode and merges properly.
"""
# Monkeypatch interactive questioner to auto accept
old_input = questioner.input
questioner.input = lambda _: "y"
stdout = six.StringIO()
try:
call_command("makemigrations", "migrations", merge=True, interactive=True, stdout=stdout)
merge_file = os.path.join(self.test_dir, 'test_migrations_conflict', '0003_merge.py')
self.assertTrue(os.path.exists(merge_file))
os.remove(merge_file)
self.assertFalse(os.path.exists(merge_file))
except CommandError:
self.fail("Makemigrations failed while running interactive questioner")
finally:
questioner.input = old_input
self.assertIn("Created new merge migration", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_makemigrations_handle_merge(self):
"""
Makes sure that makemigrations properly merges the conflicting migrations with --noinput.
"""
stdout = six.StringIO()
call_command("makemigrations", "migrations", merge=True, interactive=False, stdout=stdout)
self.assertIn("Merging migrations", stdout.getvalue())
self.assertIn("Branch 0002_second", stdout.getvalue())
self.assertIn("Branch 0002_conflicting_second", stdout.getvalue())
merge_file = os.path.join(self.test_dir, 'test_migrations_conflict', '0003_merge.py')
self.assertTrue(os.path.exists(merge_file))
os.remove(merge_file)
self.assertFalse(os.path.exists(merge_file))
self.assertIn("Created new merge migration", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_no_default"})
def test_makemigrations_dry_run(self):
"""
Ticket #22676 -- `makemigrations --dry-run` should not ask for defaults.
"""
class SillyModel(models.Model):
silly_field = models.BooleanField(default=False)
silly_date = models.DateField() # Added field without a default
class Meta:
app_label = "migrations"
stdout = six.StringIO()
call_command("makemigrations", "migrations", dry_run=True, stdout=stdout)
# Output the expected changes directly, without asking for defaults
self.assertIn("Add field silly_date to sillymodel", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_no_default"})
def test_makemigrations_dry_run_verbosity_3(self):
"""
Ticket #22675 -- Allow `makemigrations --dry-run` to output the
migrations file to stdout (with verbosity == 3).
"""
class SillyModel(models.Model):
silly_field = models.BooleanField(default=False)
silly_char = models.CharField(default="")
class Meta:
app_label = "migrations"
stdout = six.StringIO()
call_command("makemigrations", "migrations", dry_run=True, stdout=stdout, verbosity=3)
# Normal --dry-run output
self.assertIn("- Add field silly_char to sillymodel", stdout.getvalue())
# Additional output caused by verbosity 3
# The complete migrations file that would be written
self.assertIn("# -*- coding: utf-8 -*-", stdout.getvalue())
self.assertIn("class Migration(migrations.Migration):", stdout.getvalue())
self.assertIn("dependencies = [", stdout.getvalue())
self.assertIn("('migrations', '0001_initial'),", stdout.getvalue())
self.assertIn("migrations.AddField(", stdout.getvalue())
self.assertIn("model_name='sillymodel',", stdout.getvalue())
self.assertIn("name='silly_char',", stdout.getvalue())
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_path_doesnt_exist.foo.bar"})
def test_makemigrations_migrations_modules_path_not_exist(self):
"""
Ticket #22682 -- Makemigrations fails when specifying custom location
for migration files (using MIGRATION_MODULES) if the custom path
doesn't already exist.
"""
class SillyModel(models.Model):
silly_field = models.BooleanField(default=False)
class Meta:
app_label = "migrations"
stdout = six.StringIO()
call_command("makemigrations", "migrations", stdout=stdout)
# Command output indicates the migration is created.
self.assertIn(" - Create model SillyModel", stdout.getvalue())
# Migrations file is actually created in the expected path.
self.assertTrue(os.path.isfile(os.path.join(self.test_dir,
"test_migrations_path_doesnt_exist", "foo", "bar",
"0001_initial.py")))
@override_system_checks([])
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_conflict"})
def test_makemigrations_interactive_by_default(self):
"""
Makes sure that the user is prompted to merge by default if there are
conflicts and merge is True. Answer negative to differentiate it from
behavior when --noinput is specified.
"""
# Monkeypatch interactive questioner to auto reject
old_input = questioner.input
questioner.input = lambda _: "N"
stdout = six.StringIO()
merge_file = os.path.join(self.test_dir, 'test_migrations_conflict', '0003_merge.py')
try:
call_command("makemigrations", "migrations", merge=True, stdout=stdout)
# This will fail if interactive is False by default
self.assertFalse(os.path.exists(merge_file))
except CommandError:
self.fail("Makemigrations failed while running interactive questioner")
finally:
questioner.input = old_input
if os.path.exists(merge_file):
os.remove(merge_file)
self.assertNotIn("Created new merge migration", stdout.getvalue())