FastAPI Video Series - Lesson 2

Building Your First API Endpoint

Welcome to Lesson 2 of our FastAPI series!

In this lesson, you'll learn how to build your very first API endpoints using FastAPI.

We'll cover the process of creating GET and POST routes, including handling dynamic URL parameters and query strings.

This lesson is designed to strengthen your understanding of API development while giving you practical experience in building basic routes.

Overview

In this lesson, you will:

• Create multiple API endpoints.
• Work with both static routes and dynamic routes.
• Learn how to handle path and query parameters.
• Understand how to return JSON responses from your endpoints.

FastAPI makes it easy to create and manage endpoints with minimal code, and it automatically generates interactive documentation for you to test your API.

By the end of this lesson, you'll be able to build and test your endpoints confidently.

What You Will Learn

Creating a Simple GET Endpoint

• Define a Root Endpoint: Learn how to create a basic GET route.
• Understanding Decorators: Use the @app.get() decorator to define endpoints.
• Returning JSON: Return a simple JSON response to confirm your endpoint is working.

Building Dynamic Endpoints with Path and Query Parameters

• Path Parameters: Capture dynamic segments from the URL.
• Query Parameters: Optionally pass extra data in the URL.
• Automatic Data Conversion: See how FastAPI handles type conversion for you.

Creating a POST Endpoint with Data Validation

• Introducing Pydantic Models: Utilize Pydantic for defining data schemas.
• Handling JSON Payloads: Create a POST endpoint that accepts and validates incoming data.
• Responding with Data: Return a structured JSON response based on the input.

Key Takeaways

By the end of Lesson 2, you should be able to:

• Define API endpoints using FastAPI decorators.
• Handle dynamic routes using path parameters and optional query parameters.
• Validate and process data using POST endpoints combined with Pydantic models.
• Test your API endpoints using the automatically generated interactive documentation.

Start Coding Today!

Open your editor, update your FastAPI project with these new endpoints, and experiment with them using your browser.

Happy coding, and see you in the next lesson!

GitHub repository: https://github.com/nunombispo/FastAPI-Series---Lesson-2

What's Next?

In our next lesson, we’ll dive deeper into Data Validation with Pydantic.

You’ll learn how to leverage Pydantic further to ensure that your data remains safe and reliable as your API grows.

Stay tuned as we build on these fundamental concepts to create more robust and user-friendly APIs.