Multiple filter parameters in Rest API - Mini Project: Build & Apply

Multiple Filter Parameters in REST API

📖 Scenario: You are building a simple REST API for a bookstore. Customers want to search for books by different filters like author and genre.

🎯 Goal: Create a REST API endpoint that accepts multiple filter parameters and returns the matching books.

📋 What You'll Learn

Create a list of books with title, author, and genre

Add variables to hold filter parameters for author and genre

Filter the list of books based on the given author and genre

Return the filtered list as JSON output

💡 Why This Matters

🌍 Real World

Filtering data by multiple parameters is common in search features on websites and apps, like searching for products by brand and category.

💼 Career

Understanding how to handle multiple filter parameters is important for backend developers building APIs that serve filtered data to frontend applications.

1

Create the initial data set

Create a list called books with these exact dictionaries: {'title': 'The Hobbit', 'author': 'Tolkien', 'genre': 'Fantasy'}, {'title': '1984', 'author': 'Orwell', 'genre': 'Dystopian'}, and {'title': 'The Silmarillion', 'author': 'Tolkien', 'genre': 'Fantasy'}.

Rest API

# Create the list of books with title, author, and genre
# Your code here

Need a hint?

Use a list of dictionaries to store the books with their details.

2

Add filter parameters

Create two variables called filter_author and filter_genre. Set filter_author to 'Tolkien' and filter_genre to 'Fantasy'.

Rest API

books = [
    {'title': 'The Hobbit', 'author': 'Tolkien', 'genre': 'Fantasy'},
    {'title': '1984', 'author': 'Orwell', 'genre': 'Dystopian'},
    {'title': 'The Silmarillion', 'author': 'Tolkien', 'genre': 'Fantasy'}
]
# Create filter_author and filter_genre variables
# Your code here

Need a hint?

Set the filter variables to the exact strings given.

3

Filter the books list

Create a new list called filtered_books that contains only the books where author equals filter_author and genre equals filter_genre. Use a list comprehension.

Rest API

books = [
    {'title': 'The Hobbit', 'author': 'Tolkien', 'genre': 'Fantasy'},
    {'title': '1984', 'author': 'Orwell', 'genre': 'Dystopian'},
    {'title': 'The Silmarillion', 'author': 'Tolkien', 'genre': 'Fantasy'}
]
filter_author = 'Tolkien'
filter_genre = 'Fantasy'
# Create filtered_books using list comprehension
# Your code here

Need a hint?

Use a list comprehension with an if condition checking both author and genre.

4

Print the filtered books

Print the filtered_books list.

Rest API

books = [
    {'title': 'The Hobbit', 'author': 'Tolkien', 'genre': 'Fantasy'},
    {'title': '1984', 'author': 'Orwell', 'genre': 'Dystopian'},
    {'title': 'The Silmarillion', 'author': 'Tolkien', 'genre': 'Fantasy'}
]
filter_author = 'Tolkien'
filter_genre = 'Fantasy'
filtered_books = [book for book in books if book['author'] == filter_author and book['genre'] == filter_genre]
# Print the filtered_books list
# Your code here

Need a hint?

Use print(filtered_books) to show the filtered list.