mirror of
https://github.com/django/django.git
synced 2024-12-28 12:06:22 +00:00
36 lines
1.4 KiB
Python
36 lines
1.4 KiB
Python
from django.db import connection, transaction
|
|
from django.db.models import Q
|
|
from django.db.models.constraints import CheckConstraint
|
|
from django.db.utils import IntegrityError
|
|
|
|
from . import PostgreSQLTestCase
|
|
from .models import RangesModel
|
|
|
|
try:
|
|
from psycopg2.extras import NumericRange
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
class SchemaTests(PostgreSQLTestCase):
|
|
def get_constraints(self, table):
|
|
"""Get the constraints on the table using a new cursor."""
|
|
with connection.cursor() as cursor:
|
|
return connection.introspection.get_constraints(cursor, table)
|
|
|
|
def test_check_constraint_range_value(self):
|
|
constraint_name = 'ints_between'
|
|
self.assertNotIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
constraint = CheckConstraint(
|
|
check=Q(ints__contained_by=NumericRange(10, 30)),
|
|
name=constraint_name,
|
|
)
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(RangesModel, constraint)
|
|
with connection.cursor() as cursor:
|
|
constraints = connection.introspection.get_constraints(cursor, RangesModel._meta.db_table)
|
|
self.assertIn(constraint_name, constraints)
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
RangesModel.objects.create(ints=(20, 50))
|
|
RangesModel.objects.create(ints=(10, 30))
|