Book Image

Node.js 6.x Blueprints

By : Fernando Monteiro
Book Image

Node.js 6.x Blueprints

By: Fernando Monteiro

Overview of this book

Node.js is the most popular framework to create server-side applications today. Be it web, desktop, or mobile, Node.js comes to your rescue to create stunning real-time applications. Node.js 6.x Blueprints will teach you to build these types of projects in an easy-to-understand manner. The key to any Node.js project is a strong foundation on the concepts that will be a part of every project. The book will first teach you the MVC design pattern while developing a Twitter-like application using Express.js. In the next chapters, you will learn to create a website and applications such as streaming, photography, and a store locator using MongoDB, MySQL, and Firebase. Once you’re warmed up, we’ll move on to more complex projects such as a consumer feedback app, a real-time chat app, and a blog using Node.js with frameworks such as loopback.io and socket.io. Finally, we’ll explore front-end build processes, Docker, and continuous delivery. By the end of book, you will be comfortable working with Node.js applications and will know the best tools and frameworks to build highly scalable desktop and cloud applications.
Table of Contents (16 chapters)
Node.js 6.x Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Understanding Geospatial indexes on MongoDB


Starting from version 2.4 of MongoDB, we have the Geospatial search feature using GeoJSON format.

Tip

You can find more information about GeoJSON at the official link: http://geojson.org/.

GeoJSON is an open source specification for formatting shapes in coordinates. It is widely used and very useful for making applications with geographical data. The format is pretty simple, and we used this format on the locations model, as you can see:

var LocationSchema = new Schema({ 
  title: String, 
  coordinates: { 
    type: [Number], 
    index: '2dsphere' 
  }, 
  created: { 
    type: Date, 
    default: Date.now 
  } 
}); 
 

The highlighted code is the GeoJSON format to store coordinates.

Tip

You can read more about Geospatial query on MongoDB here: https://docs.mongodb.com/manual/reference/operator/query-geospatial/, and more geospatial indexes here: https://docs.mongodb.com/manual/applications/geospatial-indexes/.

Creating 2dsphere indexes in MongoDB

Let...