Django Rest Framework Mixins

brief_list.py

class BriefListMixin:
    """
    Sometimes front-end needs brief list of models
    Need to override brief_fields mapping like
    {'frontend_name': 'model_field'}
    """

    brief_fields = {}

    @decorators.list_route(methods=['GET', ], url_path='brief')
    def brief_list(self, request):
        """
        Brief list
        """
        result = []
        queryset = self.filter_queryset(self.get_queryset())
        for s in queryset:  # type: Model
            field = {}
            for key, value in self.brief_fields.items():
                field[key] = getattr(s, value)
            result.append(field)
        return Response(result)

protected_foreign_key.py

class ProtectedForeignKeyDeleteMixin:
    """
    If foreign key has Protected on delete mode, DRF can't process this.
    """

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        try:
            instance.delete()
            return_status = status.HTTP_204_NO_CONTENT
            msg = None
        except ProtectedError:
            return_status = status.HTTP_403_FORBIDDEN
            fields_dict = instance._meta.fields_map
            msg = dict()
            msg['message'] = "One of the following fields prevent deleting this instance: {}"\
                .format(", ".join(fields_dict.keys()))
            msg['fields'] = fields_dict.keys()
        return Response(status=return_status, data=msg)

Hello, did you write to avoid a 500 server error ?
I am looking for a solution. How to implement this ? I know it's an old post but if you remember will be great : )