node.js - Is it a right way to response when query database? -

i use express , mysql node-orm2.

there request data database.

var loginformchecker = function (phone, pwd, cb) {     var ret = {};      userbasemodel.exists({         phone: phone,         password: pwd     }, function (err, exists) {         if (err) {             // database error             ret = new returndata({                 error: error.database,                 type: 0             });         } else {             ret = new returndata({                 data: exists,                 type: 1             });         }          cb(ret);     }); };  router.route('/login') .get(function (req, res) {     var query = req.query;      var output = function (ret) {         if (ret) {             res.send(ret);         } else {             res.status(500).send('something broken!');         }     };      userservice.loginformchecker(query.p, query.k, output); }); 

i pass output function loginformchecker, , call in callback of querying data.

i not know whether right way it. there better way do, maybe promise or something?

thanks.