Part 2. Application development in MongoDB

The second part of this book is a deep exploration of MongoDB’s document data model, query language, and CRUD (create, read, update, and delete) operations.

We’ll make these topics concrete by progressively designing an e-commerce data model and the CRUD operations necessary for managing such data. Thus each chapter will present its subject matter in a top-down fashion, first by presenting examples within the sample e-commerce application’s domain, and then by systematically filling in the details. On your first reading, you may want to read the e-commerce examples only and save the detailed material for later, or vice versa.

In chapter 4, you’ll learn some schema design principles and then construct a basic e-commerce data model for products, categories, users, orders, and product reviews. Then you’ll learn about how MongoDB organizes data on the database, collection, and document levels. This will include a summary of BSON’s core data types.

Chapter 5 covers MongoDB’s query language and aggregation functions. You’ll learn how to issue common queries against the data model developed in the previous chapter, and you’ll practice a few aggregations. Then, in the nuts and bolts sections, you’ll see the semantics of query operators presented in detail. The chapter ends with an explanation of the map-reduce and grouping functions.