32-DRF框架-序列化器ModelSerializer

# 如果我们想要使用序列化器对应的是Django的模型类，DRF为我们提供了ModelSerializer模型类序列化器来帮助我们快速创建一个Serializer类

创建modelserializer序列化器

#  在serializer.py中创建序列器
  # ModelSerializer模型序列化类
class TsSerializer(serializers.ModelSerializer):
    class Meta:
        # model 指定给那个模型类创建序列化器
        model = TuShu
        # 1. fields 指明序列化哪些字段
 
        # {"tid": 1, "name": "喜喜", "riqi": "2022-01-03", "count": 1, "is_delete": true}
        # fields = "__all__" # 返回全部字段
 
        # {"tid": 1, "name": "喜喜"}
        # fields = ('tid', "name")  # 指定字段
 
        # 2. exclude:排除
 
        # {"tid": 1, "name": "\u559c\u559c", "riqi": "2022-01-03", "count": 1}
        # exclude = ("is_delete",)
 
        # 3. 指明那些字段只用于序列化输出,不用于反序列化
        fields = "__all__"
        read_only_fields = ("tid", "name", "riqi")
 
        # 4. 额外参数 -->选项参数
        extra_kwargs = {
            "count": {"required": True, "min_value": 0}
        }
 

视图调用

class TuShuView3(View):
    def get(self, request):
        qset = TuShu.objects.all()
        # modelSerializer模型序列化器
        ts = TsSerializer(instance=qset, many=True)
 
        return JsonResponse(data=ts.data, safe=False)

配置路由

    re_path(r"tushu3/$", TuShuView3.as_view(), name="tushu3")