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Building Python Microservices with FastAPI

You're reading from   Building Python Microservices with FastAPI Build secure, scalable, and structured Python microservices from design concepts to infrastructure

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Product type Paperback
Published in Aug 2022
Publisher Packt
ISBN-13 9781803245966
Length 420 pages
Edition 1st Edition
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Author (1):
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Sherwin John C. Tragura Sherwin John C. Tragura
Author Profile Icon Sherwin John C. Tragura
Sherwin John C. Tragura
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Table of Contents (17) Chapters Close

Preface 1. Part 1: Application-Related Architectural Concepts for FastAPI microservice development
2. Chapter 1: Setting Up FastAPI for Starters FREE CHAPTER 3. Chapter 2: Exploring the Core Features 4. Chapter 3: Investigating Dependency Injection 5. Chapter 4: Building the Microservice Application 6. Part 2: Data-Centric and Communication-Focused Microservices Concerns and Issues
7. Chapter 5: Connecting to a Relational Database 8. Chapter 6: Using a Non-Relational Database 9. Chapter 7: Securing the REST APIs 10. Chapter 8: Creating Coroutines, Events, and Message-Driven Transactions 11. Part 3: Infrastructure-Related Issues, Numerical and Symbolic Computations, and Testing Microservices
12. Chapter 9: Utilizing Other Advanced Features 13. Chapter 10: Solving Numerical, Symbolic, and Graphical Problems 14. Chapter 11: Adding Other Microservice Features 15. Index 16. Other Books You May Enjoy

Creating async CRUD transactions using Motor

Motor is an asynchronous driver that relies on the AsyncIO environment of the FastAPI. It wraps PyMongo to produce non-blocking and coroutine-based classes and methods needed to create asynchronous repository layers. It is almost like PyMongo when it comes to most of the requirements except for the database connectivity and repository implementation.

But before we proceed, we need to install the motor extension using the following pip command:

pip install motor

Setting up the database connectivity

Using the AsyncIO platform of the FastAPI, the Motor driver opens a connection to the MongoDB database through its AsyncIOMotorClient class. When instantiated, the default connection credential is always localhost at port 27017. Alternatively, we can specify the new details in str format through its constructor. The following script shows how to create a global AsyncIOMotorClient reference with the specified database credentials:

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