What is the best practice to connect/disconnect to a database?

Question

I\'d like to know how to work with connectivity to a database in MEAN stack application. In particular, when should I create a connection to a database and when should I destroy

Answer 1

Its best practice to have your db connection in a separate module (db.js)

var mongoose = require('mongoose')

mongoose.connect('mongodb://localhost/dbname', function(){
    console.log('mongodb connected')
})
module.exports = mongoose

Each model should have a separate module that takes in the db connection (post.js)

var db = require('../db.js')
var Post = db.model('Post', {
    username: {type: String, required: true},
    body: {type: String, required: true},
    date: { type: Date, required: true, default: Date.now }  
})

module.exports = Post

Then whenever you need to use that data set just require it and make calls

var Post = require('/models/post')
Post.save()
Post.find()