Mongoose Originals

A mongoose plugin to retrieve original values

Instalation

yarn add mongoose-originals

Usage

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var originals = require('mongoose-originals');
 
var CustomerSchema = new Schema({
    name: String,
    email: String,
    answers: [{ name: String }],
});
 
CustomerSchema.plugin(originals, { fields: ['name', 'email'] });
var Customer = mongoose.model('Customer', CustomerSchema);
 
var customer = new Customer({ name: 'test', email: 'example.com' });
 
customer.save();
 
customer.name = 'new name';
console.log(customer.originals.name);

Since mongoose has some limitations originals object will not be available when you create a brand new unsaved object. To work arround that, you'll need to execute the "initOriginals" method.

var customer = new Customer({ name: 'test', email: 'example.com' });
customer.initOriginals();
console.log(customer.originals.name);

You can check if the values are changed compared to the originals:

var customer = new Customer({ name: 'test', email: 'example.com' });
customer.save().then((customer) => {
    console.log(customer.isChanged()); // false
    customer.name = 'other';
    console.log(customer.isChanged()); // true
});

License
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Copyright (c) 2016-2017 Enhancv
Licensed under the MIT license.