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Key benefits

A step-by-step guide that explains how to use Mongoid through lots of examples and code

Monitor and fine-tune the performance of your application

Work with the MongoDB aggregation framework

Description

Mongoid helps you to leverage the power of schema-less and efficient document-based design, dynamic queries, and atomic modifier operations. Mongoid eases the work of Ruby developers while they are working on complex frameworks. Starting with why and how you should use Mongoid, this book covers the various components of Mongoid. It then delves deeper into the detail of queries and relations, and you will learn some tips and tricks on improving performance. With this book, you will be able to build robust and large-scale web applications with Mongoid and Rails. Starting with the basics, this book introduces you to components such as moped and origin, and how information is managed, learn about the various datatypes, embedded documents, arrays, and hashes. You will learn how a document is stored and manipulated with callbacks, validations, and even atomic updates. This book will then show you the querying mechanism in detail, right from simple to complex queries, and even explains eager loading, lazy evaluation, and chaining of queries. Finally, this book will explain the importance of performance tuning and how to use the right indexes. It also explains MapReduce and the Aggregation Framework.

What you will learn

Learn the syntax of Mongoid 4 with Rails 4

Understand moped, the new Ruby driver for MongoDB Learn about document relations in Mongoid

Understand origin, the new querying DSL

Manage indexes in Mongoid

Learn about gems that work with Mongoid

Tune and monitor performance

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Frequently bought together

Learning Mongoid

Dec 2013 140 pages

4.5 (2)

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Maciej Mensfeld Feb 24, 2014

Would I recommend this book? Yes! It can be a solid Mongo and Mongoid starting point for begginers and a “knowledge refresher” for people that use Mongoid longer that few weeks. It is well written and it has a lot of examples. Really a good one about Mongoid.It’s not extremely long - You may consider this an issue, but I’ve found this really helpful. Chapters aren’t long, so getting through them is not painful. Chapters (and the book itself) are really consistent. You won’t get bored reading this one or feel like giving up.This book is mostly about Mongoid. Don't expect Ruby/Rails/Gem management introduction or anything else. Even MongoDb performance/management stuff is not the subject of this study. On the other hand the book is called "Learning Mongoid" so everything extra is just a nice feature :-)As mentioned if it goes about learning Mongoid, this book does what it was meant to do.

Amazon Verified review

Stefan Frank Feb 19, 2014

This is a short, very focused book: It does exactly what it says: It shows you how to use mongoid - not more, but nothing less. When you pick up this short paper, you should already have your mind set on. You should not expect a lengthy introduction to rails or to mongodb, instead it jumps right to the point of connecting a rails-app to a mongoDB using mongoid.Although Mongoid‘s documentation has vastly improved in the last year or so, (which is probably one of the main reasons, barely anyone is using mongo-mapper anymore) – scrapping together decent examples for using it still takes some digging. So the book fills the – albeit small – gap between mongoid’s documentation and the myriad of tiny snippets you can dig up on stack-overflow. It is a small book, but it gives you examples on just about every piece of mongoid’ api along with helpful examples that show you how to use these api’s.The writing is clear and to the point, with helpful callouts pointing out common pitfalls&things you should look out for when using mongoid. Unlike other books of this nature, the examples do not lead to a complete application: instead, the examples are focused on demonstrating the specific part of the api and do a good job of showing you how to apply concept to a real-world(-ish) example.The bottom line:I liked it, that the book is short: it touches on every part of the api, giving you a good overview of mongoid: It is often very helpful when you already know that things like the paranoia-plugin exist and what their purpose is – when it comes to actually using is, you can still find the specifics online, now that you know what you are looking for.That being said, the shortness comes at a price:some topics come in a little too short:- There is probably more about scaling a mongoDB than just getting the formatting of your data-disk right(although it’s a start) – but then again, this is no book about mongodb. But maybe if you touch on the topic this light, you can leave it out altogether just as good…- the book shows every piece of the api, but it doesn’t help you much with choosing which pattern to use when. Mapping your domain onto a mongoid/mongodb model is not entirely straightforward and there are many ways you can model the same domain with different approaches – and this can be a bit challenging at first, especially when you come from a RDBMS-background. But again: This is not about modeling mongoDB-databases, this book is about mongoid-and-mongoid-only.-some examples are very terse and you can probably argue, that you can find these kind of examples on stack-overflow and combine it with the mongoid-docs (which are not soo bad to begin with): But having all this stuff together in one place is certainly helpful when you start.All in all, I liked the book: Even if you’ve been doing mongoid for some time, you will probably find the one or other thing in it you didn’t know yet about mongoid. And if you’re just starting with mongoid and you’re looking for a decent introduction to the whole api, this is certainly the book to go for.

Learning Mongoid: If you know MongoDB and Ruby, then Mongoid is a very handy tool to have at your disposal. Quickly learn to build Rails applications with the helpful code samples and instructions in this book.

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