def constrain (self, entity):
if not hasattr(self, '_pending_constraints'):
self._pending_constraints = []
for constraint in list_constraints():
if constraint.argument() in self._kwargs:
self._pending_constraints.append([
constraint,
self._kwargs.get(constraint.argument()),
entity,
self.name])
for constraint, value, entity, name in self._pending_constraints:
try:
self._field.add_constraint(constraint(value, entity=entity,
field_name=name))
except EnvironmentError:
pass
else:
self._pending_constraints.remove([constraint, value,
entity, name])
def is_constrained (self):
return self.is_primary_key or any(x.argument() in self._kwargs for \
x in list_constraints())
def test_list_constraints (self):
self.assertEqual(tesql.types.constraints.ALL_CONSTRAINTS, [])
list_constraints()
self.assertNotEqual(tesql.types.constraints.ALL_CONSTRAINTS, [])
