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

Testing an entity class

Now that all the entity classes and dependent subclasses have been defined, the next question that might arise is, how can we test such structures? The answer, of course, lies in developing an appropriate unit test. As in earlier chapters, we created a directory called /path/to/repo/chapters/07/test/booksomeplace/entity that we could define the test scripts in. It would take far too much space to delineate tests for all the classes discussed in this chapter, so we will only focus on developing a test for the booksomeplace.entity.user.Customer class.

As expected, we'll begin the test script with the appropriate import statements. Note that in order to perform imports from the classes we wish to test, we need to append /repo/chapters/07/src to the system path:

# sweetscomplete.entity.user.test_entity_customer
import os,sys
sys.path.append(os.path.realpath("/repo/chapters/07/src"))
import json
import unittest
from booksomeplace.entity.base...