def _run_additional_validation(self, data):
"""
Run additional data validation on API data and transition instances.
Raise ValidationError (DRF) if any error occurs.
"""
errors = _transition_data_validation(self.objects, self.transition,
data)
if errors:
api_errors = {}
for action_name, action_errors in errors.items():
for field_name, field_errors in action_errors.items():
api_errors[field_name] = [
exc.message for exc in field_errors
]
raise DRFValidationError(api_errors)
def post(self, request, *args, **kwargs):
not_valid = self._is_valid()
if not_valid:
return not_valid
form = self.get_form()
if form.is_valid():
# additional data validation
form_errors = _transition_data_validation(self.objects,
self.transition,
form.cleaned_data)
if form_errors:
for action, action_errors in form_errors.items():
for field_name, field_errors in action_errors.items():
form.add_error(action + '__' + field_name,
field_errors)
else:
return self.form_valid(form)
return self.form_invalid(form)