javascript - Nodejs Runs Promise but still Undefined is not a function -

i facing peculiar problem unable debug. typeerror: code returning function undefined ends api call @ log , break points, after api ends error, proceeds function of same.

how possible.

am using nodejs/express/sequelizejs

models.holdings.update(obj,{       where:{              id: obj.id             } }).then().catch() 

then , catch meant provide functions execute upon resolution , error (respectively).

models.holdings.update(obj,{       where:{              id: obj.id             } }).then(function(result) {     console.log(result); }).catch(function(error) {     console.log(error); });