rest-framework框架

方式一：

# class BookView(View):
#     def get(self,request,*args,**kwargs):
#         book_list = list(Book.objects.all().values("title","price"))
#         return HttpResponse(json.dumps((book_list)))


方式二：
# class BookView(View):
#     def get(self,request,*args,**kwargs):
#         book_list = Book.objects.all()
#         list = []
#         for book in book_list:
#             list.append({
#                 "title":book.title,
#                 "price":book.price,
#                 "pub_date":book.pub_date,
#             })
#
#         return HttpResponse(json.dumps(list))



方式三

# 利用django的序列化serializers  会展示所有字段内容
# from django.core import serializers
# class BookView(View):
#     def get(self,request,*args,**kwargs):
#         book_list = Book.objects.all()
#         temp = serializers.serialize("json",book_list)
#         return HttpResponse(temp)





# 方式四
#  rest-framework框架的序列化器   上面的只能处理发送浏览器的信息
# 但我们需要处理发回服务器的数据

from rest_framework.response import Response
from rest_framework.views import APIView
from django.core import serializers
class BookView(APIView):
    def get(self,request,*args,**kwargs):
        book_list = Book.objects.all()
        # 将book_list转换为json数据[{},{},{}}
        bs = BookSerializers(book_list,many=True)
        return Response(bs.data)

from rest_framework import serializers
class BookSerializers(serializers.ModelSerializer):
    class Meta:
        model = Book
        fields = "__all__"

##  exclude = [‘authors‘,]  排除，可以自定义

‘‘‘
    class BookSerializers(serializers.Serializer):
        title=serializers.CharField(max_length=32)
        price=serializers.IntegerField()
        pub_date=serializers.DateField()
        publish=serializers.CharField(source="publish.pk")
        authors=serializers.CharField()


     temp=[]
     for book in book_list:
         temp.append({
            "title": book.title,
            "price": book.price,
            "pub_date": book.pub_date,
            "publish": book.publish.pk,
            "authors": book.authors,

         })



     [
            {
                "title": "python",
                "price": 123,
                "pub_date": "2018-04-08",
                "publish": "1"
            },
            {
                "title": "go",
                "price": 222,
                "pub_date": "2018-04-08",
                "publish": "2"
            },

      ]

‘‘‘