Assignment2

 Assignment2

  • Add a new field to Book and BookRequest called published_date: int (for example, published_date: int = 2012). So,this book as published on the year of 2012.
  • Enhance each Book to now have a published_date
  • Then create a new GET request method to filter by published_date

Code:
from fastapi import FastAPI, Body
from books3 import Book
from datavalidatorhelper import BookRequest

app = FastAPI()

BOOKS = [
    Book(id=1, title="DSA with Java",
         author="Puneet Kumar Singh",
    description="A comprehensive guide to Data Structures and Algorithms using Java.",
         rating=5,
         published_date=2014),
    Book(id=2, title="Python Programming",
         author="Puneet Kumar Singh",
         description="An introduction to Python programming for beginners.",
         rating=4,
         published_date=2015),
    Book(id=3, title="Machine Learning Basics",
         author="Puneet Kumar Singh",
         description="Understanding the fundamentals of Machine Learning.",
         rating=4,
         published_date=2014),
    Book(id=4, title="Web Development with FastAPI",
         author="Ramesh Jha",
         description="Building web applications using FastAPI.",
         rating=3,
         published_date=2016),
    Book(id=5, title="Data Science with Python",
         author="Kalidas",
         description="A guide to Data Science using Python.",
         rating=2,
         published_date=2018),
    Book(id=6, title="Advanced Java Programming",
         author="Kalpana Gupta",
         description="Deep dive into advanced concepts of Java programming.",
         rating=1,
         published_date=2014)
]

# API endpoint to get all books detail unfiltered.
@app.get("/books") # static path to get all books
async def read_all_books():
    """
    This function returns the list of all books.
    """
    return BOOKS

""" post request without any input validation
@app.post("/create_book")
async def create_book(book_request=Body()):
    BOOKS.append(book_request)
"""
#API endpoint to fetch book by using published_date as parameter
@app.get("/books/published/")
async def read_book_by_published_date(published_date: int):
    books_to_return = []
    for book in BOOKS:
        if book.published_date == published_date:
            books_to_return.append(book)
    return books_to_return

# API endpoint to fetch book by using id
@app.get("/books/{book_id}")
async def read_book_by_id(book_id: int):
    for book in BOOKS:
        if book.id == book_id:
            return book
    return {"message": "book not found"}

# API endpoint to fetch books by rating
@app.get("/books/")
async def read_book_by_rating(rating: int):
    book_to_return = []
    for book in BOOKS:
        if book.rating == rating:
            book_to_return.append(book)
    return book_to_return

#post request with input validator
@app.post("/creat_book")
async def create_book(book_request: BookRequest):
    new_book = Book(**book_request.model_dump())
# new_book = Book(**book_request.dict()) -> if you are using
pydantic version 1 else the model_dump() for pydentic version 2.
    # BOOKS.append(new_book) -> it will store the valid input
dump but you can have duplicate ids.
    BOOKS.append(find_book_id(new_book))
# It will add latest id sequence number to id automatically
and will overwrite the provided input so you don't need to
bother about the id value sequence.

def find_book_id(book: Book):
    if len(BOOKS) > 0:
        book.id = BOOKS[-1].id + 1
    else:
        book.id = 1
    return book


# API endpoint to update existing book entry
@app.put("/books/update_book")
async def update_book_by_id(book_request: BookRequest):
    new_book=Book(**book_request.model_dump())
    for i in range(len(BOOKS)):
        if BOOKS[i].id == new_book.id:
            BOOKS[i]=new_book
            return {"message": "Book is updated", "detail": new_book}
    return {"message": "Book id not found.
Hence can't add new book to library. Do use create book API endpoint to
add new book into library."}

# API endpoint to delete book entry from library
@app.delete("/books/{book_id}")
async def delete_book_by_id(book_id : int):
    for i in range(len(BOOKS)):
        if BOOKS[i].id == book_id:
            BOOKS.pop(i)
            return {"message": "Book is deleted successfully."}
    return {"message":"Book not found."}

Result:



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