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from django.core import checks
from django.core.checks import Error, Warning
from django.db import models
from django.test import SimpleTestCase
from django.test.utils import (
isolate_apps, modify_settings, override_settings, override_system_checks,
)
class EmptyRouter:
pass
@isolate_apps('check_framework', attr_name='apps')
@override_system_checks([checks.model_checks.check_all_models])
class DuplicateDBTableTests(SimpleTestCase):
def test_collision_in_same_app(self):
class Model1(models.Model):
class Meta:
db_table = 'test_table'
class Model2(models.Model):
class Meta:
db_table = 'test_table'
self.assertEqual(checks.run_checks(app_configs=self.apps.get_app_configs()), [
Error(
"db_table 'test_table' is used by multiple models: "
"check_framework.Model1, check_framework.Model2.",
obj='test_table',
id='models.E028',
)
])
@override_settings(DATABASE_ROUTERS=['check_framework.test_model_checks.EmptyRouter'])
def test_collision_in_same_app_database_routers_installed(self):
class Model1(models.Model):
class Meta:
db_table = 'test_table'
class Model2(models.Model):
class Meta:
db_table = 'test_table'
self.assertEqual(checks.run_checks(app_configs=self.apps.get_app_configs()), [
Warning(
"db_table 'test_table' is used by multiple models: "
"check_framework.Model1, check_framework.Model2.",
hint=(
'You have configured settings.DATABASE_ROUTERS. Verify '
'that check_framework.Model1, check_framework.Model2 are '
'correctly routed to separate databases.'
),
obj='test_table',
id='models.W035',
)
])
@modify_settings(INSTALLED_APPS={'append': 'basic'})
@isolate_apps('basic', 'check_framework', kwarg_name='apps')
def test_collision_across_apps(self, apps):
class Model1(models.Model):
class Meta:
app_label = 'basic'
db_table = 'test_table'
class Model2(models.Model):
class Meta:
app_label = 'check_framework'
db_table = 'test_table'
self.assertEqual(checks.run_checks(app_configs=apps.get_app_configs()), [
Error(
"db_table 'test_table' is used by multiple models: "
"basic.Model1, check_framework.Model2.",
obj='test_table',
id='models.E028',
)
])
@modify_settings(INSTALLED_APPS={'append': 'basic'})
@override_settings(DATABASE_ROUTERS=['check_framework.test_model_checks.EmptyRouter'])
@isolate_apps('basic', 'check_framework', kwarg_name='apps')
def test_collision_across_apps_database_routers_installed(self, apps):
class Model1(models.Model):
class Meta:
app_label = 'basic'
db_table = 'test_table'
class Model2(models.Model):
class Meta:
app_label = 'check_framework'
db_table = 'test_table'
self.assertEqual(checks.run_checks(app_configs=apps.get_app_configs()), [
Warning(
"db_table 'test_table' is used by multiple models: "
"basic.Model1, check_framework.Model2.",
hint=(
'You have configured settings.DATABASE_ROUTERS. Verify '
'that basic.Model1, check_framework.Model2 are correctly '
'routed to separate databases.'
),
obj='test_table',
id='models.W035',
)
])
def test_no_collision_for_unmanaged_models(self):
class Unmanaged(models.Model):
class Meta:
db_table = 'test_table'
managed = False
class Managed(models.Model):
class Meta:
db_table = 'test_table'
self.assertEqual(checks.run_checks(app_configs=self.apps.get_app_configs()), [])
def test_no_collision_for_proxy_models(self):
class Model(models.Model):
class Meta:
db_table = 'test_table'
class ProxyModel(Model):
class Meta:
proxy = True
self.assertEqual(Model._meta.db_table, ProxyModel._meta.db_table)
self.assertEqual(checks.run_checks(app_configs=self.apps.get_app_configs()), [])
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