serializer用起来稍微麻烦，可以使用ModelSerializer，类似于django里的Form与ModelForm

1.定义ModelSerializer

from rest_framework import serializersfrom goods.models import Goods, GoodsCategory# class GoodsSerializer(serializers.Serializer):#     """#     Goods的serializer#     """#     name = serializers.CharField(required=True, max_length=100)#     chick_num = serializers.IntegerField(default=0)#     # goods_front_image = serializers.ImageField()#     # 外键需要写数据里的字段名，不能写类里的字段名，例如不能写category，需要些category_id,请求时也得时数据库里的名#     category_id = serializers.IntegerField()##     """#     创建#     """#     def create(self, validated_data):#         return Goods.objects.create(**validated_data)class CategorySerializer(serializers.ModelSerializer):    class Meta:        model = GoodsCategory        fields = '__all__'# 优点：解决上面的category_id外键问题class GoodsSerializer(serializers.ModelSerializer):    """    Goods的serializer    """    # 自定义，可以获取到外键数据    # read_only表示只用在获取数据    category_obj = CategorySerializer(source='category',read_only=True)    category_name = serializers.CharField(source='category.name',read_only=True)    class Meta:        model = Goods        # 外键写类里的名就可以        # fields = ('name','chick_num','category')        fields = '__all__'

2.View引用

from django.shortcuts import renderfrom rest_framework.views import APIViewfrom rest_framework.response import Responsefrom rest_framework import statusfrom rest_framework.parsers import JSONParserfrom goods.models import Goodsfrom goods.serializer import GoodsSerializerclass GoodsList(APIView):    def get(self, request):        goods = Goods.objects.all()[:10]        goods_json = GoodsSerializer(goods, many=True)        # print(type(goods_json))        # print(type(goods_json.data))        return Response(goods_json.data)    def post(self, request):        serializer = GoodsSerializer(data=request.data) # 不管是form或是json，post过来的数据，都可以通过request.data获取        if serializer.is_valid():            serializer.save()            return Response({
   'data': 'ok'}, status=status.HTTP_201_CREATED)        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

3.test