text: from rest_framework import serializers
  from .models import *
  
  class BookSerializer(serializers.ModelSerializer):
      class Meta:
          model = Book
          fields = ['pk', 'title', 'num_pages', 'publish_dat', 'price', 'color', 'isbn13']
          extra_kwargs = {
              'publish_dat': {"required":False},
              'price': {"required":False},
              'color': {"required":False},
              'isbn13': {"required":False}
          }