javascript - TypeError on static method of mongoose model -

i'm using node.js along mongodb driver mongoose 3.6.1. schema definition:

models/user.js

var mongoose = require('mongoose'),     schema = mongoose.schema;  var userschema = new schema({             ... });  module.exports = {     model : mongoose.model('user', userschema) };  userschema.statics.dosomething = function () {     console.log("i'm doing something"); } 

then in separate controller, do

controllers/another.js

var user = require("../models/user").model;  function foo() {     user.dosomething(); } 

and following error

[typeerror: object function model(doc, fields, skipid) {        if (!(this instanceof model))          return new model(doc, fields, skipid);        model.call(this, doc, fields, skipid);      } has no method 'dosomething'] 

however, if dump user object can see method there, expected. relevant part of dump confirming that

... schema:  { statics:     { dosomething: [function] } ... 

any idea on i'm doing wrong?

you need set static method before create model:

userschema.statics.dosomething = function () {   var user = mongoose.model('user');   // think 'this' points user model here:   // var user = this;   // var user = new user(...);   console.log("i'm doing something"); }  module.exports = {   model : mongoose.model('user', userschema) }; 

models are, use mongoose terminology, "compiled" schemas. once created model, changes schema aren't propagated model that's derived it.