Book Image

Learn MongoDB 4.x

By : Doug Bierer
Book Image

Learn MongoDB 4.x

By: Doug Bierer

Overview of this book

When it comes to managing a high volume of unstructured and non-relational datasets, MongoDB is the defacto database management system (DBMS) for DBAs and data architects. This updated book includes the latest release and covers every feature in MongoDB 4.x, while helping you get hands-on with building a MongoDB database app. You’ll get to grips with MongoDB 4.x concepts such as indexes, database design, data modeling, authentication, and aggregation. As you progress, you’ll cover tasks such as performing routine operations when developing a dynamic database-driven website. Using examples, you’ll learn how to work with queries and regular database operations. The book will not only guide you through design and implementation, but also help you monitor operations to achieve optimal performance and secure your MongoDB database systems. You’ll also be introduced to advanced techniques such as aggregation, map-reduce, complex queries, and generating ad hoc financial reports on the fly. Later, the book shows you how to work with multiple collections as well as embedded arrays and documents, before finally exploring key topics such as replication, sharding, and security using practical examples. By the end of this book, you’ll be well-versed with MongoDB 4.x and be able to perform development and administrative tasks associated with this NoSQL database.
Table of Contents (22 chapters)
1
Section 1: Essentials
5
Section 2: Building a Database-Driven Web Application
9
Section 3: Digging Deeper
13
Section 4: Replication, Sharding, and Security in a Financial Environment
14
Working with Complex Documents Across Collections

Updating documents with embedded objects

In this scenario, we imagine that an admin has received a request from a partner to update their contact details for a certain property. In order to enable the admin to update Property contact details, the web app needs to do the following:

  • Look up and present a list of partners.
  • Present a list of properties for that partner.
  • Get current information on the property that needs be updated.
  • Present two web forms named NameForm and ContactForm.
  • Collect form data into Contact and Name instances.
  • Update the properties collection.

The traditional approach would be to first look up a list of partners and then direct the admin to a screen where they would choose the partner to work on. The form posting would then present the admin with another form where they could choose from a list of properties for that partner. Finally, a third form would appear with the information to be updated. In total, this represents a cumbersome three-stage process...