Try http://127.0.0.1:8000/services/opportunitylists/?_sortby=id vs http://127.0.0.1:8000/services/opportunitylists/
Try http:// 127.0.0. 1:8000/ services/ opportunitylist s/?_sortby= id vs http:// 127.0.0. 1:8000/ services/ opportunitylist s/