      def field_to_native(self, obj, field_name):
          value = self.model_field._get_val_from_obj(obj)
          if is_protected_type(value):
              return value
          return self.model_field.value_to_string(self.obj)
  
      def attributes(self):
          return {
              "type": self.model_field.get_internal_type()
          }
 
</s>
        return self.model_field.value_to_string(obj)
      def field_to_native(self, obj, field_name):
          value = self.model_field._get_val_from_obj(obj)
          if is_protected_type(value):
              return value
        return self.model_field.value_to_string(obj)
  
      def attributes(self):
          return {
              "type": self.model_field.get_internal_type()
          }
keep keep keep keep replace keep keep keep keep keep
 Fix for field to make it easier to access field relationships
rest_framework/fields.py