Build scalable, efficient Rails web applications with Mongoid Overview 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 In Detail 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 from this book 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 Approach A step-by-step tutorial with focused examples that will help you build scalable, high performance Rails web applications with Mongoid. Who this book is written for If you are an application developer who wants to learn how to use Mongoid in a Rails application, this book will be great for you. You are expected to be familiar with MongoDB and Ruby.