Django Rest Framework 错误：{"user":["This field is required."]

Question

发布时：

curl -X POST  -H "Authorization: Token sometoken" -d "url=someurl" 127.0.0.1:8000/create/

我得到错误：

{"user":["This field is required."] with the ItemSerializer,

我在 SO 上看到其他帖子谈论使用 perform_create，我试图用它来保存用户对象，但由于某种原因它不起作用。当用户定义如下时， Perform_create 起作用：

user = serializers.CharField(
    default=serializers.CurrentUserDefault()
)

但我想使用用户对象，而不仅仅是存储用户名的CharField

序列化器：

class UserDetailsSerializer(serializers.ModelSerializer):
  class Meta:
    model = UserModel
    fields = ('pk', 'username', 'email', 'first_name', 'last_name')
    read_only_fields = ('email', )


class CategorySerializer(serializers.ModelSerializer):
  class Meta:
    model = Category
    fields = ['cat']

 class CommentSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
         model = Comment
         fields = [
             'comment',

         ]

class ItemSerializer(serializers.HyperlinkedModelSerializer):
     user = UserDetailsSerializer()
     category = CategorySerializer(many=True)
     thecomments = CommentSerializer(many=True)
     timestamp = serializers.SerializerMethodField('get_mytimestamp')

     def get_mytimestamp(self, obj):
         return time.mktime(datetime.datetime.now().timetuple())

     class Meta:
         model = Item

         fields = [
         "url",
         "user",
         "timestamp",
         "categories",
         "thecomments",
    ]

型号：

class Item(models.Model):
    url = models.CharField(max_length=1000)
    user = models.ForeignKey('auth.User', unique=False)
    timestamp = models.DateTimeField(auto_now_add=True)
    url = models.CharField(max_length=1000)
    categories = models.ManyToManyField(Category)

查看：

class ItemCreateAPIView(generics.CreateAPIView):
     serializer_class = ItemSerializer

     def perform_create(self, serializer):
         serializer.save(user=self.request.user)

解决办法：

用于创建项目的序列化器：

class CreateSerializer(serializers.HyperlinkedModelSerializer):
     timestamp = serializers.SerializerMethodField('get_mytimestamp')

     def get_mytimestamp(self, obj):
         return time.mktime(datetime.datetime.now().timetuple())

     class Meta:
         model = Item

         fields = [
         "url",
         "timestamp",
         ]

views.py

class ItemCreateAPIView(generics.CreateAPIView):
     serializer_class = CreateSerializer

     def perform_create(self, serializer):
         serializer.save(user=self.request.user)

帖子：

curl -X POST  -H "Authorization: Token sometoken" -d "url='someurl'" 127.0.0.1:8000/createitem/

Answer 1

class ItemSerializer(serializers.HyperlinkedModelSerializer):
     user = UserDetailsSerializer()
     category = CategorySerializer(many=True)
     thecomments = CommentSerializer(many=True)
     timestamp = serializers.SerializerMethodField('get_mytimestamp')

     def get_mytimestamp(self, obj):
         return time.mktime(datetime.datetime.now().timetuple())

     class Meta:
         model = Item

         fields = [
         "url",
         "user",
         "timestamp",
         "categories",
         "thecomments",
         ]
        extra_kwargs = {'user': {'required': False}}

将extra_kwargs = {'user': {'required': False}} 添加到您的序列化程序元