Django 测试：Residence() 有一个意外的关键字参数“hotel_id”

Question

  class Hotel (models.Model):
  name = models.CharField()
  country = models.CharField()
  city = models.CharField()
  street = models.CharField() 


 class Residence(models.Model):
  hotel_id = models.ForeignKey(Hotel, on_delete=models.DO_NOTHING, related_name='hotel')
  house_number = models.CharField()

我想加入两个模型（酒店和住宅）然后发布。我写了以下代码：

serializers.py

 class HotelSerializer(serializers.HyperlinkedModelSerializer):
  class Meta:
    model = Hotel
    fields = ['name', 'country', 'city', 'street']


class ResidenceSerializer(serializers.HyperlinkedModelSerializer):
 hotel_id = HotelSerializer()

 class Meta:
  model = Residence
  fields = ['house_number', 'hotel_id'] 
 
 def create(self, validated_data):
    return Residence.objects.create(**validated_data)
 
views.py

 class ResidenceViewSet(viewsets.ModelViewSet):
 serializer_class = ResidenceSerializer
 queryset = Residence.objects.all()  
 

当我尝试在我的 api 中发布数据时，出现以下错误：Residence() got an unexpected keyword argument 'hotel_id'。有人可以帮我吗？

Answer 1

将hotel_id 替换为hotel。而且，您仍然可以从视野中经过酒店

class ResidenceSerializer(serializers.HyperlinkedModelSerializer):
 hotel = HotelSerializer()

 class Meta:
  model = Residence
  fields = ['house_number', 'hotel'] 

Also if you are not interested in hyper links(urls) then replace 
`serializers.HyperlinkedModelSerializer` with `serializers.ModelSerializer`.
 

HyperlinkedModelSerializer 和 ModelSerializer 之间的区别在于序列化程序由 Serjik 发布在这里

一个简单的例子：

class UserSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = User
        fields = ('url', 'username', 'email', 'groups')


class GroupSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Group
        fields = ('url', 'name')

bash> http -a admin:yourpassword http://127.0.0.1:8000/users/

 "results": [
        {
            "email": "admin@min.com",
            "groups": [
                "http://127.0.0.1:8000/groups/1/",
                "http://127.0.0.1:8000/groups/2/"
            ],
            "url": "http://127.0.0.1:8000/users/1/",
            "username": "admin"
        }
    ]

但如果你改变了

class UserSerializer(serializers.ModelSerializer):
        class Meta:
            model = User
            fields = ('url', 'username', 'email', 'groups')

结果将是：

   "results": [
        {
            "email": "admin@min.com",
            "groups": [
                1,
                2
            ],
            "url": "http://127.0.0.1:8000/users/1/",
            "username": "admin"
        }
    ]