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i have a problem when i want to include my models with mongoose in nodejs, i'm create a models with schema like this var mongoose = require('mongoose') , Schema = mongoose.Schema; var Users = new Schema({ idUser : {type:String}, username: {type:String} }); // middleware Users.pre('save', function (next,done) { notify(this.get('email') + done); // something goes wrong next(new Error('something went wrong')); }); //registered on mongoose models mongoose.model("Users",Users); and i save in folde models/schema.js but i don't know how to call that file in app.js , when i'm try using this code var mongoose = require('mongoose') , models = require('./models/schema.js'); //mongoose configurationfor database; var db = mongoose.connect("mongodb://localhost/vynchat"); var users = mongoose.model("Users"); users.save(); i have error when i try to start sudo node app.js throw e; // process.nextTick error, or 'error' event on first tick ^ TypeError: Object function model() { Model.apply(this, arguments); } has no method 'save' at Object.<anonymous> (/opt/development/vynapp/app.js:18:7) at Module._compile (module.js:441:26) at Object..js (module.js:459:10) at Module.load (module.js:348:31) at Function._load (module.js:308:12) at Array.0 (module.js:479:10) at EventEmitter._tickCallback (node.js:192:40) the error model() has no method save... how i can fix this..?

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