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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
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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

Querying properties of embedded objects

Listing a property does not require a form, and only involves the pymongo.collection.findOne() method called from a property domain service lookup method. Things get a bit tricky, however, when dealing with room type listings. This involves parsing an embedded array of RoomType objects. What is even trickier is that within this array of objects is another property, beds, itself another array! So, here is our proposed approach:

  • Define a view using the property domain service to perform a straightforward lookup on the property by key.
  • Define view methods that return a JSON list of room types.
  • Add two routes: one for the listing, the other for the method called by jQuery.
  • Define a template that displays basic property information.
  • Within the template, add a jQuery AJAX request for room type information.

The view method that returns JSON also breaks down the array of bed types embedded within each RoomType object.

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