python全栈开发day99-DRF序列化组件

1.解释器组件源码分析

https://www.processon.com/view/link/5ba0a8e7e4b0534c9be0c968

2.基于CBV的接口设计

　　1）、django循环queryset对象构造数组套字典方式

　　2）、django.serializers.serialize方式

　　3）、restframework序列化组件方式

　　

###################### 基于CBV的接口设计#######################

# class CourseView(View):
#
#     def get(self,request):
#
#         course_list=Course.objects.all()
#         ret=[]
#         for course in course_list:
#             ret.append({
#                 "title":course.title,
#                 "desc":course.desc,
#             })
#
#
#         return HttpResponse(json.dumps(ret,ensure_ascii=False))

###################### 基于DRF的接口设计#######################

# from rest_framework.views import APIView
# from rest_framework.response import Response
# from rest_framework.parsers import JSONParser,FormParser,FileUploadParser
# from app01.models import Course
#

#
#
# from rest_framework import serializers
# class CourseSerializer(serializers.Serializer):
#     title=serializers.CharField(max_length=32)
#     desc=serializers.CharField(max_length=32)
#
#
# class CourseView(APIView):
#
#     def get(self,request):
#         '''
#         查看所有数据
#         方式1：
#         ret=[]
#         for course in course_list:
#             ret.append({
#                 "title":course.title,
#                 "desc":course.desc,
#             })
#
#         json.dumps(ret,ensure_ascii=False)
#
#         方式2：
#             from django.core.serializers import serialize # Django的序列化组件
#             data=serialize("json",course_list)
#             print("data",data)
#
#         方式3：
#             restframework序列化组件
#         :param request:
#         :return:
#         '''
#
#         course_list=Course.objects.all()
#
#         cs=CourseSerializer(course_list,many=True)
#         print("====>",cs.data) # 序列化接口
#
#         '''
#
#         [OrderedDict([('title', 'python'), ('desc', 'python非常好')]), OrderedDict([('title', 'linux'), ('desc', 'linux好')]), OrderedDict([('title', 'go'), ('desc', 'gogogo')])]
#
#         '''
#
#         return Response(cs.data)
#
#
#     def post(self,request):
#
#         print(request.data) # 静态方法：解析数据工作
#         cs=CourseSerializer(data=request.data)
#         if cs.is_valid(): # 校验
#
#             # Course.objects.create(**request.data)
#
#             return Response(cs.data) # 序列化数据
#         else:
#             return Response(cs.errors) # 序列化错误信息
#

##########################################################################

3.restframework序列化组件

　　1.serializers.Serializer　　　　

class BookSerializer(serializers.Serializer):
    title = serializers.CharField()
    price = serializers.IntegerField()
    # publish_email = serializers.CharField(source='publish.email')
    # publish_name = serializers.CharField(source='publish.name')
    publish = serializers.CharField(source='publish.nid')
    authors = serializers.SerializerMethodField()

    def get_authors(self, obj):
        data = []
        print(obj.authors.all())
        for i in obj.authors.all():
            temp = []
            temp.append(i.name)
            temp.append(i.email)
            data.append(temp)
        return data

　　2.serializers.ModelSerializer

class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model = Book
        fields = "__all__"
        # exclude = ["publish"]

    # publish = serializers.CharField(source='publish.nid')
    # authors = serializers.SerializerMethodField()
    #
    # def get_authors(self, obj):
    #     data = []
    #     print(obj.authors.all())
    #     for i in obj.authors.all():
    #         temp = []
    #         temp.append(i.name)
    #         temp.append(i.email)
    #         data.append(temp)
    #     return data


class BookView(APIView):
    # parser_classes = [FormParser, JSONParser, MultiPartParser]

    def get(self, request):
        book_list = Book.objects.all()
        bs = BookSerializer(book_list, many=True)
        return response.Response(bs.data)

    def post(self, request):
        serializer = BookSerializer(data=request.data)

        if serializer.is_valid():

            serializer.save()
            print(serializer.data) # 必须在save()方法之后
            # {'id': 8, 'title': '第10本书', 'price': 12, 'publish': 1, 'authors': [1, 3]}
            print(serializer.validated_data)
            # OrderedDict([('title', '第10本书'), ('price', 12), ('publish', < Publish: 沙河出版社 >),
                         # ('authors', [ < Author: 下马哥 >, < Author: eva >])])
            return response.Response(serializer.data)
        else:
            return response.Response(serializer.errors)