serializers.py 文件源码

def update(self, instance, validated_data):
        request = self.get_request_or_die()
        if not can_edit(request.user, instance, check_api_read_only=False):
            # This branch is only entered when doing a PATCH request (partial
            # update), because datalogger validation is done first.
            raise PermissionDenied(_("Permission to edit Unit denied"))
        elif instance.api_read_only:
            raise MethodNotAllowed(request.method, _("Unit is read only"))
        return super(UnitSerializer, self).update(instance, validated_data)