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Learn MongoDB 4.x

You're reading from   Learn MongoDB 4.x A guide to understanding MongoDB development and administration for NoSQL developers

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Product type Paperback
Published in Sep 2020
Publisher Packt
ISBN-13 9781789619386
Length 610 pages
Edition 1st Edition
Tools
Concepts
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Author (1):
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Doug Bierer Doug Bierer
Author Profile Icon Doug Bierer
Doug Bierer
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Table of Contents (22) Chapters Close

Preface 1. Section 1: Essentials
2. Introducing MongoDB 4.x FREE CHAPTER 3. Setting Up MongoDB 4.x 4. Essential MongoDB Administration Techniques 5. Section 2: Building a Database-Driven Web Application
6. Fundamentals of Database Design 7. Mission-Critical MongoDB Database Tasks 8. Using AJAX and REST to Build a Database-Driven Website 9. Section 3: Digging Deeper
10. Advanced MongoDB Database Design 11. Using Documents with Embedded Lists and Objects 12. Handling Complex Queries in MongoDB 13. Section 4: Replication, Sharding, and Security in a Financial Environment
14. Working with Complex Documents Across Collections 15. Administering MongoDB Security 16. Developing in a Secured Environment 17. Deploying a Replica Set 18. Replica Set Runtime Management and Development 19. Deploying a Sharded Cluster 20. Sharded Cluster Management and Development 21. Other Books You May Enjoy

Producing Python code from the JSON query

For the purposes of this illustration, we create a new Django app called maintenance located in /path/to/repo/www/chapter_10/maintenance. The logic in views.py, shown here, is extremely simple. The main work is done by the user domain service. The resulting iteration is then rendered in the totals.html template and injected into the main layout.html template.

As usual, the module starts with a set of import statements:

from django.template.loader import render_to_string
from django.http import HttpResponse
from config.config import Config
from db.mongodb.connection import Connection
from biglittle.domain.user import UserService

We then define a method, totals(), which runs the report and sends the results to the view template:

def totals(request) :
config = Config()
userSvc = UserService(config, 'User')
totals = userSvc.fetchTotalsByLender()
params = { 'totals' : totals }
main = render_to_string...
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