Django Rest Framework Request Validation

Question

Is there a way to validate params that are passed with the request without writing boilerplate code? Now I've got something like this:

    project_id = kwargs['project_id']

    try:
        project_obj = Project.objects.get(id=project_id)
    except Project.DoesNotExist:
        return Response(
            {'message': 'Requested project does not exist'},
            status=status.HTTP_404_NOT_FOUND
        )
    except ValueError:
        return Response(
            {'message': 'Project id must be a number'},
            status=status.HTTP_400_BAD_REQUEST
        )

I've read about Serializers' Validation but I'm not sure it's the right thing. Without handling these exceptions, Django just returns 500, it's not the behavior I actually want.

I don't know of a clever way to check to see if an objects exists in the database with, you know, checking to see if it's in the database. I suppose a cheesy way would be to get a list of the all the project_ids and see if your ID passed in is in that list. To the other error you are catching, ValueError, you can write a simple check to see if project_id is a number and if not simply send back an error of your choice instead of catching the exception. — Michael Platt
– Michael Platt, Commented May 23, 2019 at 19:42

Tom · Accepted Answer · 2019-05-23 19:51:16Z

1

You are going to wind up writing some boilerplate, but you can clean what you have up by specifying relevant field types like using an IntegerField would spare you checking the type and get_object_or_404 would spare you the try/ catch in those cases.

However, you really want to use the real right field for this job and it's going to be a Relation field, most likely PrimaryKeyRelatedField.

answered May 23, 2019 at 19:51

Tom

22.9k5 gold badges67 silver badges97 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Django Rest Framework Request Validation

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related