mongoose save vs insert vs create

Question

What are different ways to insert a document(record) into MongoDB using Mongoose?

My current attempt:

var mongoose = require('mongoose'); var Schema = mongoose.Schema;  var notificationsSchema = mongoose.Schema({     "datetime" : {         type: Date,         default: Date.now     },     "ownerId":{         type:String     },     "customerId" : {         type:String     },     "title" : {         type:String     },     "message" : {         type:String     } });  var notifications = module.exports = mongoose.model('notifications', notificationsSchema);  module.exports.saveNotification = function(notificationObj, callback){     //notifications.insert(notificationObj); won't work     //notifications.save(notificationObj); won't work     notifications.create(notificationObj); //work but created duplicated document } 

Any idea why insert and save doesn't work in my case? I tried create, it inserted 2 document instead of 1. That's strange.

Answer 1

The .save() is an instance method of the model, while the .create() is called directly from the Model as a method call, being static in nature, and takes the object as a first parameter.

var mongoose = require('mongoose');  var notificationSchema = mongoose.Schema({     "datetime" : {         type: Date,         default: Date.now     },     "ownerId":{         type:String     },     "customerId" : {         type:String     },     "title" : {         type:String     },     "message" : {         type:String     } });  var Notification = mongoose.model('Notification', notificationsSchema);   function saveNotification1(data) {     var notification = new Notification(data);     notification.save(function (err) {         if (err) return handleError(err);         // saved!     }) }  function saveNotification2(data) {     Notification.create(data, function (err, small) {     if (err) return handleError(err);     // saved!     }) } 

Export whatever functions you would want outside.

More at the Mongoose Docs, or consider reading the reference of the Model prototype in Mongoose.