Hi team, i used generic.RetrieveAPIVIEW class in drf django and i in t

Question

Hi team, i used generic.RetrieveAPIVIEW class in drf django and i in this class i used get_object method in this method return output=get_objects_or_404(mymodel,id=2) how can i add new field in this query? When i used output.newfield=4 it can not add this field to output