django rest framework perform_update or post_save return custom response -

how can return custom response json error when object older 8 minutes.

here code, response doesn't work:

def perform_update(self, serializer):     instance = serializer.save()     diff_minutes = (datetime.now() - instance.ordered_date).total_seconds() / 60     if diff_minutes > 8:         return response({'expired': true}, status=status.http_500_internal_server_error)     self.post_save(instance) 

same when use post_save.

i don't response, pass.

any suggestion?

since want return 500 error can raise apiexception. example:

from rest_framework.exceptions import apiexception  def perform_update(self, serializer):     instance = serializer.save()     diff_minutes = (datetime.now() - instance.ordered_date).total_seconds() / 60     if diff_minutes > 8:         raise apiexception("expired")     self.post_save(instance) 

raising apiexception trigger .handle_exception(self, exc) function. default return result like:

{detail : "expired" }

and status code of 500. if need more control on exact return value / status code can overwrite handle_exception function , return whatever like.

also since apparently don't have enough rep comment, question previous posted solution stating want validation on update. can overwrite update() function in serializer , called on update opposed create() called when create new object.