from decimal import Decimal
from django.db.backends.signals import connection_created
from django.db.migrations.writer import MigrationWriter
from django.test.utils import modify_settings
from . import PostgreSQLTestCase
try:
from psycopg2.extras import DateRange, DateTimeRange, DateTimeTZRange, NumericRange
from django.contrib.postgres.fields import (
DateRangeField,DateTimeRangeField,DecimalRangeField,IntegerRangeField,)except ImportError:
pass
class PostgresConfigTests(PostgreSQLTestCase):
def test_register_type_handlers_connection(self):
from django.contrib.postgres.signals import register_type_handlers
self.assertNotIn(
register_type_handlers, connection_created._live_receivers(None)
)with modify_settings(INSTALLED_APPS={"append": "django.contrib.postgres"}):
self.assertIn(
register_type_handlers, connection_created._live_receivers(None)
)self.assertNotIn(
register_type_handlers, connection_created._live_receivers(None)
)def test_register_serializer_for_migrations(self):
tests = ((DateRange(empty=True), DateRangeField),
(DateTimeRange(empty=True), DateRangeField),
(DateTimeTZRange(None, None, "[]"), DateTimeRangeField),
(NumericRange(Decimal("1.0"), Decimal("5.0"), "()"), DecimalRangeField),
(NumericRange(1, 10), IntegerRangeField),
)def assertNotSerializable():
for default, test_field in tests:
with self.subTest(default=default):
field = test_field(default=default)
with self.assertRaisesMessage(
ValueError, "Cannot serialize: %s" % default.__class__.__name__
):MigrationWriter.serialize(field)
assertNotSerializable()
with self.modify_settings(INSTALLED_APPS={"append": "django.contrib.postgres"}):
for default, test_field in tests:
with self.subTest(default=default):
field = test_field(default=default)
serialized_field, imports = MigrationWriter.serialize(field)
self.assertEqual(
imports,{"import django.contrib.postgres.fields.ranges",
"import psycopg2.extras",
},)self.assertIn(
"%s.%s(default=psycopg2.extras.%r)"
% (field.__module__,field.__class__.__name__,default,),serialized_field,)assertNotSerializable()