Mongoose

Mongoose allows us to have access to the MongoDB commands, to include mongoose library type in your terminal:

npm install mongoose --save

In order to use mongoose in your js, you need:

//Grab it in our project
var mongoose = require('mongoose')

//Connect to a MongoDB database
mongoose.connect('mongodb://localhost/mongoosedb')

//Create an Schema (is what is used to define attributes for our documents)
var Schema = mongoose.Schema

//A model using it
var Person = mongoose.model('Person', person)

Let’s consider the following example:

var mongoose = require('mongoose')
var Schema = mongoose.Schema

mongoose.connect('mongodb://localhost/mongoosedb')

var person = new Schema({
  name: String,
  lastName: String
})

var Person = mongoose.model('Person', person)

var object = {"name":"Jose Luis", "lastName":"De la Cruz"}

Person.create(object, function(err, doc){
  if(err){
    console.log('There is an error', err)
    return
  }

  console.log('Person was created', doc)
})

Person.find({}, function(err, docs){
  if(err){
    console.log('There is an error', err)
    return
  }

  docs.forEach(function(person){
    console.log('person:', person.name)
  })
})

In this example we are doing:

• Defining an Schema Person with name and lastname as String attributes
• Creating a new Json object with those attributes
• Creating a Person model
• Using Person.create to create a new person in MongoDB
• Using Person.find to get person collection from MongoDB

Don’t forget to create package.json with npm init and install MongoDB in your computer before create any js file.

To execute this js file type in your terminal:

node mongoose_example.js

To download the project:

git clone https://github.com/josdem/ux-development.git
git fetch
git checkout mongoose

Return to the main article