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