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from unittest import mock
from django.db import connections, models
from django.test import SimpleTestCase
from django.test.utils import isolate_apps, override_settings
class TestRouter:
"""
Routes to the 'other' database if the model name starts with 'Other'.
"""
def allow_migrate(self, db, app_label, model_name=None, **hints):
return db == ("other" if model_name.startswith("other") else "default")
@override_settings(DATABASE_ROUTERS=[TestRouter()])
@isolate_apps("check_framework")
class TestMultiDBChecks(SimpleTestCase):
def _patch_check_field_on(self, db):
return mock.patch.object(connections[db].validation, "check_field")
def test_checks_called_on_the_default_database(self):
class Model(models.Model):
field = models.CharField(max_length=100)
model = Model()
with self._patch_check_field_on("default") as mock_check_field_default:
with self._patch_check_field_on("other") as mock_check_field_other:
model.check(databases={"default", "other"})
self.assertTrue(mock_check_field_default.called)
self.assertFalse(mock_check_field_other.called)
def test_checks_called_on_the_other_database(self):
class OtherModel(models.Model):
field = models.CharField(max_length=100)
model = OtherModel()
with self._patch_check_field_on("other") as mock_check_field_other:
with self._patch_check_field_on("default") as mock_check_field_default:
model.check(databases={"default", "other"})
self.assertTrue(mock_check_field_other.called)
self.assertFalse(mock_check_field_default.called)
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