将主键添加到序列化器

Question

我想在返回的列表中添加id字段，它是每个对象的主键。

在我的models.py中：

class Category(models.Model):
     name = models.CharField(max_length=200)

在我的serializers.py中：

class CategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = Category
        fields = ('id', 'name')

在我的views.py中：

class ListCategoriesView(generics.ListAPIView):
"""
Provides a get method handler.
"""

serializer_class = CategorySerializer


def get(self, request, *args, **kwargs):
    token = request.META.get("HTTP_TOKEN","")
    if not token:

        """ do some action here """

    if not UserAccess.objects.filter(accessToken=token).exists():

        """ do some action here """

    else:
        serialized_categories = []
        all_categories = Category.objects.all()
        for category in all_categories:
          """ I'm filling the object here with the id , and the name """
            serialized_item = CategorySerializer(data={
                    "id": category.id,
                    "name": category.name
                })
            if serialized_item.is_valid():
                serialized_categories.append(serialized_item.data)
        return Response(
            data=serialized_categories,
            status=status.HTTP_200_OK
        )

我收到以下回复：

我想只添加id字段来获得此响应：

Answer 1

只允许视图执行工作。

class Node {

    String value;
    Node left, right;

    Node(String item) {
        value = item;
        left = right = null;
    }

    boolean isLeaf() {
        return (left == null) && (right == null);
    }
}