CRUD operations in FastAPI - Mini Project: Build & Apply

CRUD Operations with FastAPI

📖 Scenario: You are building a simple web API to manage a list of books in a library. Each book has an id, title, and author. You will create endpoints to add, read, update, and delete books.

🎯 Goal: Create a FastAPI app with endpoints to perform CRUD (Create, Read, Update, Delete) operations on a list of books stored in memory.

📋 What You'll Learn

Use FastAPI to create the web API

Store books in a list of dictionaries with keys: id, title, author

Create endpoints for: adding a book, getting all books, updating a book by id, and deleting a book by id

Use proper HTTP methods: POST for create, GET for read, PUT for update, DELETE for delete

💡 Why This Matters

🌍 Real World

APIs like this are used to manage data in web applications, mobile apps, and services.

💼 Career

Understanding CRUD operations with FastAPI is essential for backend development roles and building RESTful APIs.

1

Set up initial book data

Create a list called books with these exact entries: {'id': 1, 'title': '1984', 'author': 'George Orwell'} and {'id': 2, 'title': 'Brave New World', 'author': 'Aldous Huxley'}.

FastAPI

# Create the initial list of books
# Your code here

Need a hint?

Use a list with two dictionaries exactly as shown.

2

Create FastAPI app and import

Import FastAPI from fastapi and create an app instance called app.

FastAPI

books = [
    {'id': 1, 'title': '1984', 'author': 'George Orwell'},
    {'id': 2, 'title': 'Brave New World', 'author': 'Aldous Huxley'}
]

# Import FastAPI and create app instance
# Your code here

Need a hint?

Use from fastapi import FastAPI and then app = FastAPI().

3

Add GET endpoint to read all books

Create a GET endpoint at /books using @app.get('/books') that returns the books list.

FastAPI

from fastapi import FastAPI

books = [
    {'id': 1, 'title': '1984', 'author': 'George Orwell'},
    {'id': 2, 'title': 'Brave New World', 'author': 'Aldous Huxley'}
]

app = FastAPI()

# Create GET endpoint to return all books
# Your code here

Need a hint?

Use @app.get('/books') decorator and a function that returns books.

4

Add POST, PUT, DELETE endpoints for CRUD

Add these endpoints to app: - POST /books to add a new book from JSON body - PUT /books/{book_id} to update a book's title and author by book_id - DELETE /books/{book_id} to remove a book by book_id Use @app.post, @app.put, and @app.delete decorators respectively.

FastAPI

from fastapi import FastAPI
from fastapi import Request

books = [
    {'id': 1, 'title': '1984', 'author': 'George Orwell'},
    {'id': 2, 'title': 'Brave New World', 'author': 'Aldous Huxley'}
]

app = FastAPI()

@app.get('/books')
def get_books():
    return books

# Add POST, PUT, DELETE endpoints below
# Your code here

Need a hint?

Use async functions with appropriate decorators and handle book list updates. Raise 404 error if book not found.