Book Image

Building Python Web APIs with FastAPI

By : Abdulazeez Abdulazeez Adeshina
Book Image

Building Python Web APIs with FastAPI

By: Abdulazeez Abdulazeez Adeshina

Overview of this book

RESTful web services are commonly used to create APIs for web-based applications owing to their light weight and high scalability. This book will show you how FastAPI, a high-performance web framework for building RESTful APIs in Python, allows you to build robust web APIs that are simple and intuitive and makes it easy to build quickly with very little boilerplate code. This book will help you set up a FastAPI application in no time and show you how to use FastAPI to build a REST API that receives and responds to user requests. You’ll go on to learn how to handle routing and authentication while working with databases in a FastAPI application. The book walks you through the four key areas: building and using routes for create, read, update, and delete (CRUD) operations; connecting the application to SQL and NoSQL databases; securing the application built; and deploying your application locally or to a cloud environment. By the end of this book, you’ll have developed a solid understanding of the FastAPI framework and be able to build and deploy robust REST APIs.
Table of Contents (14 chapters)
Part 1: An Introduction to FastAPI
Part 2: Building and Securing FastAPI Applications
Part 3: Testing And Deploying FastAPI Applications

Setting up SQLModel

The first step to integrate a SQL database into our planner application is to install the SQLModel library. The SQLModel library was built by the creator of FastAPI and is powered by Pydantic and SQLAlchemy. Support from Pydantic will make it easy for us to define models, as we learned in Chapter 3, Response Models and Error Handling.

Since we’ll be implementing both SQL and NoSQL databases, we’ll create a new GitHub branch for this section. In your terminal, navigate to the project directory, initialize a GitHub repository, and commit the existing files:

$ git init
$ git add database models routes
$ git commit -m "Committing bare application without a database"

Next, create a new branch:

$ git checkout -b planner-sql

Now, we are ready to set up SQLModel in our application. From your terminal, activate the virtual environment and install the SQLModel library:

$ source venv/bin/activate
(venv)$ pip install sqlmodel...