if persid == null or ansid == null or ans == null then return bad_req
var db = new OpportunityDB.open(db_path)
db.change_answer(ansid, persid, ans)
if persid == null or ansid == null or ans == null then return bad_req
var db = new OpportunityDB.open(db_path)
db.change_answer(ansid, persid, ans)