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PHP and MongoDB Web Development Beginner's Guide

PHP and MongoDB Web Development Beginner's Guide

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PHP and MongoDB Web Development Beginner's Guide

PHP and MongoDB Web Development Beginner's Guide

4.2 (11)

Overview of this book

With the rise of Web 2.0, the need for a highly scalable database, capable of storing diverse user-generated content is increasing. MongoDB, an open-source, non-relational database has stepped up to meet this demand and is being used in some of the most popular websites in the world. MongoDB is one of the NoSQL databases which is gaining popularity for developing PHP Web 2.0 applications.PHP and MongoDB Web Development Beginner’s Guide is a fast-paced, hands-on guide to get started with web application development using PHP and MongoDB. The book follows a “Code first, explain later” approach, using practical examples in PHP to demonstrate unique features of MongoDB. It does not overwhelm you with information (or starve you of it), but gives you enough to get a solid practical grasp on the concepts.The book starts by introducing the underlying concepts of MongoDB. Each chapter contains practical examples in PHP that teache specific features of the database.The book teaches you to build a blogging application, handle user sessions and authentication, and perform aggregation with MapReduce. You will learn unique MongoDB features and solve interesting problems like real-time analytics, location-aware web apps etc. You will be guided to use MongoDB alongside MySQL to build a diverse data back-end. With its concise coverage of concepts and numerous practical examples, PHP and MongoDB Web Development Beginner’s Guide is the right choice for the PHP developer to get started with learning MongoDB.
Table of Contents (17 chapters)
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PHP and MongoDB Web Development
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Managing relationships between documents


When building an application, we have to map the real-world objects into a data model that fits the use case scenarios of the application. These real-world objects are related to each other to some degree. A typical blog application, for example, will have articles written by authors, comments posted to articles, categories created by authors and assigned to articles, and so on. We know from our discussion in Chapter 1, Getting Started with MongoDB that MongoDB (and NoSQL databases in general) is non-relational by nature; there are no FOREIGN KEYs or JOINs. Then how do we simulate the relation between two documents in MongoDB?

There are two ways we can do that, embedding a document within the other document, or creating a reference from one document to the other.

Embedded documents

In this approach, the top-level document contains the related document in itself. For example, an author document may have an address document embedded in it:

{
"_id" : ObjectId...
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PHP and MongoDB Web Development Beginner's Guide
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