class Meta:
model = Signature
validators = [
UniqueForDateValidator(queryset=Signature.objects.all(),
field='owner',
date_field='created')
]
def get_validators(self):
# If the validators have been declared explicitly then use that.
validators = getattr(getattr(self, 'Meta', None), 'validators', None)
if validators is not None:
return validators
# Determine the default set of validators.
validators = []
model_class = self.Meta.model
field_names = set([
field.source for field in self.fields.values()
if (field.source != '*') and ('.' not in field.source)
])
# Note that we make sure to check `unique_together` both on the
# base model class, but also on any parent classes.
for parent_class in [model_class] + list(model_class._meta.parents.keys()):
for unique_together in parent_class._meta.unique_together:
if field_names.issuperset(set(unique_together)):
validator = UniqueTogetherValidator(
queryset=parent_class._default_manager,
fields=unique_together
)
validators.append(validator)
# Add any unique_for_date/unique_for_month/unique_for_year constraints.
info = model_meta.get_field_info(model_class)
for field_name, field in info.fields_and_pk.items():
if field.unique_for_date and field_name in field_names:
validator = UniqueForDateValidator(
queryset=model_class._default_manager,
field=field_name,
date_field=field.unique_for_date
)
validators.append(validator)
if field.unique_for_month and field_name in field_names:
validator = UniqueForMonthValidator(
queryset=model_class._default_manager,
field=field_name,
date_field=field.unique_for_month
)
validators.append(validator)
if field.unique_for_year and field_name in field_names:
validator = UniqueForYearValidator(
queryset=model_class._default_manager,
field=field_name,
date_field=field.unique_for_year
)
validators.append(validator)
return validators