Get a relationship details

def get(self, *args, **kwargs):
        """Get a relationship details"""
        self.before_get(args, kwargs)

        relationship_field, model_relationship_field, related_type_, related_id_field = self._get_relationship_data()

        obj, data = self._data_layer.get_relationship(model_relationship_field,
                                                      related_type_,
                                                      related_id_field,
                                                      kwargs)

        result = {'links': {'self': request.path,
                            'related': self.schema._declared_fields[relationship_field].get_related_url(obj)},
                  'data': data}

        qs = QSManager(request.args, self.schema)
        if qs.include:
            schema = compute_schema(self.schema, dict(), qs, qs.include)

            serialized_obj = schema.dump(obj)
            result['included'] = serialized_obj.data.get('included', dict())

        final_result = self.after_get(result)

        return final_result