Mongoose - Why we make “mongoose.Promise = global.Promise” when setting a mongoose module?

Question

I\'m working with Mongoose. I have seen a lot of developers make the following command:

mongoose.Promise = global.Promise;

Then I was curi

Answer 1

we used just in the point when we want to get connected in to MongoDB database :

var mongoose = require('mongoose');

var mongoDB = ' database url ';

mongoose.connect(mongoDB);

mongoose.Promise = global.Promise;

mongoose.connection.on('error',console.error.bind(console, 'MongoDB connection error:'));

you need to create schema and do your own model after