views.py

# from django.shortcuts import render

# from .models import Book

# from django.http import JsonResponse

# from bookapi.serializer import BookSerializer

# from rest_framework.response import Response

# from rest_framework.decorators import api_view

# from rest_framework import status

# @api_view(['GET'])
# def book_list(request):
#     books = Book.objects.all() # Returns a complex code
#     # books_python = list(books.values())  # python Data Structure
#     # return JsonResponse({'books': books_python})
    
#     serializer = BookSerializer(books, many=True)
#     return Response(serializer.data)

# @api_view(['POST'])
# def book_create(request):
#     serializer = BookSerializer(data=request.data)
    
#     if serializer.is_valid():
#         serializer.save()
#         return Response(serializer.data, status=status.HTTP_201_CREATED)
#     else:
#         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    

# @api_view(['GET', 'PUT', 'DELETE'])
# def book(request, pk):
#     try:
#         book = Book.objects.get(pk=pk)
#     except:
#         return Response({
#             'Error': 'Book does not exist!'
#         }, status=status.HTTP_404_NOT_FOUND)()

    
#     if request.method == 'GET':
#         serializer = BookSerializer(book)
#         return Response(serializer.data)
    
#     if request.method == 'PUT':
#         serializer = BookSerializer(book, data=request.data)
        
#         if serializer.is_valid():
#             serializer.save()
#             return Response(serializer.data)
#         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    
#     if request.method == 'DELETE':
#         book.delete()
#         return Response(status=status.HTTP_204_NO_CONTENT)



from rest_framework.views import APIView
from bookapi.models import Book
from bookapi.serializer import BookSerializer
from rest_framework.response import Response
from rest_framework import status

class BookList(APIView):
    def get(self, request):
        books = Book.objects.all()
        serializer = BookSerializer(books, many=True)
        return Response(serializer.data)
    


class BookCreate(APIView):
    def post(self, request):
        serializer = BookSerializer(data=request.data)
        
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        
        
        
class BookDetail(APIView):
    
    def get_book_by_pk(self, pk):
        try:
            return Book.objects.get(pk=pk)
        except:
            return Response({
                'Error': 'Book does not exist!'
            }, status= status.HTTP_404_NOT_FOUND)
    
    
    def get(self, request, pk):
        book = self.get_book_by_pk(pk)
        serializer = BookSerializer(book)
        return Response(serializer.data)        
    
    def put(self, request, pk):
        book = self.get_book_by_pk(pk)
        serializer = BookSerializer(book, data=request.data)
        
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    
    def delete(self, request, pk):
        book = self.get_book_by_pk(pk)
        book.delete()
        
        return Response(status=status.HTTP_204_NO_CONTENT)