Book Image

Mastering RethinkDB

By : Shaikh
Book Image

Mastering RethinkDB

By: Shaikh

Overview of this book

RethinkDB has a lot of cool things to be excited about: ReQL (its readable,highly-functional syntax), cluster management, primitives for 21st century applications, and change-feeds. This book starts with a brief overview of the RethinkDB architecture and data modeling, and coverage of the advanced ReQL queries to work with JSON documents. Then, you will quickly jump to implementing these concepts in real-world scenarios, by building real-time applications on polling, data synchronization, share market, and the geospatial domain using RethinkDB and Node.js. You will also see how to tweak RethinkDB's capabilities to ensure faster data processing by exploring the sharding and replication techniques in depth. Then, we will take you through the more advanced administration tasks as well as show you the various deployment techniques using PaaS, Docker, and Compose. By the time you have finished reading this book, you would have taken your knowledge of RethinkDB to the next level, and will be able to use the concepts in RethinkDB to develop efficient, real-time applications with ease.
Table of Contents (11 chapters)

Handling binary objects


As we have mentioned in this chapter about RethinkDB binary object support, let's look over how to use it using ReQL. The syntax to store binary objects differs from client to client. In Node.js it uses buffers to convert the stream into binary and we can use RethinkDB to insert that in a table.

Let us take an example from the preceding document. There is a key called Poster, which is the official poster of the movie in a JPEG image format. We can store the image directly in RethinkDB in a binary format.

Consider the following code:

rethinkdb.http("http://www.omdbapi.com/?t=avengers&y=2015&plot=short&r=json").run(connection,function(err,data) { 
if(err) { 
throw new Error(err); 
  } 
rethinkdb.table("movies").insert({ 
movieName :data.Title, 
posterImage :rethinkdb.http(data.Poster, {resultFormat : 'binary'}) 
  }).run(connection,function(err,data) { 
if(err) { 
throw new Error(err); 
    } 
console.log...