我正在使用 drf，主要问题是我的视图 returns 是空的 json

Question

我主要是我的观点returns一个空json。我想要我的博客分别 foreign_key user_id.

My models.py file

from django.db import models
# from django.contrib.auth.models import User
from django.utils import timezone
from datetime import datetime
from .validators import validate_allfile_extension
from restfapp.models import CustomUser
from django.contrib.auth.models import AbstractUser


CHOICE_GENDER = (('Male', 1), ('Female', 2), ('other', 3))

class CustomUser(AbstractUser):
    gender = models.TextField(choices=CHOICE_GENDER, null=True)
    birth_date = models.DateField(null=True, blank=True)
    
    class Blog(models.Model):
        title = models.TextField(max_length = 50)
        author = models.TextField(max_length = 50)
        description = models.TextField()
        date = models.DateField(auto_now=True)
        time = models.DateTimeField(default=datetime.now)
        image = models.ImageField(null=True, verbose_name="", validators=[validate_allfile_extension])
        user = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
        
        def __str__(self):
            return self.title

我的serializers.py文件

class AddBlogSerializer(serializers.ModelSerializer):
    title = serializers.CharField(max_length=128,  write_only=True, required=True, error_messages={'blank': "Please provide title"} )
    author = serializers.CharField(max_length=128, write_only=True, required=True, error_messages={'blank': "Please provide author"})
    description = serializers.CharField(max_length=128,  write_only=True, required=True, error_messages={'blank': "Please provide description"})
    image = serializers.FileField(write_only=True, required=True, error_messages={'invalid': "Please upload image, video or audio file"})
    
    class Meta:
        model = Blog
        fields = ["title","author","description","image",]

我的views.py文件

@api_view(['GET', 'POST'])
# @csrf_exempt
@authentication_classes([SessionAuthentication, BasicAuthentication])
@permission_classes([IsAuthenticated])
def blog(request):
    if request.method == 'GET':
        blogs_by_user_id = Blog.objects.filter(user_id=request.user.id).all()
        serializer = AddBlogSerializer(blogs_by_user_id, many=True)
        json_data = JSONRenderer().render(serializer.data)
        return Response(json_data, status=200)

我的回复：

"[{},{},{},{},{}]"

它让我感到空虚 json 我希望我的博客具有相应的 foreign_key user_id.

Answer 1

CustomUser 是你的 AbstractBaseUser 吗？

因为 request.user 将 return 一个经过验证的 AbstractBaseUser。

顺便说一句，你可以使用 request.user_id 而不是 request.user.id（你少做 1 个查询）。

为了你的view.py，我会这样写:

使用 BlogSerializer 代替 AddBlogSerializer
只是 return serializer.data 不需要 JSONRenderer() 因为这是 BlogSerializer

def blog(request):
    if request.method == 'GET':
        blogs = Blog.objects.filter(user_id=request.user_id)
        serializer = BlogSerializer(blogs, many=True)
        Response(serializer.data, status=status.HTTP_200_OK)

Answer 2

对我有用的最佳解决方案试试看：

write_only = True 阻止序列化程序 returning 读取值。考虑将其从您希望 return 发送给您的客户的任何字段中删除。

你的序列化器应该是：

classAddBlogSerializer(serializers.ModelSerializer): title = serializers.CharField(max_length=128, required=True, error_messages={'blank': "请提供标题"} ) author = serializers.CharField(max_length=128, required=True, error_messages={'blank': "请提供作者"}) description = serializers.CharField(max_length=128, required=True, error_messages={'blank': "请提供描述"}) image = serializers.FileField(required=True, error_messages={'invalid': "请上传图片、视频或音频文件"})

class Meta:
    model = Blog
    fields = ["title","author","description","image",]

现在，它将 return 您的 json 数据

我正在使用 drf，主要问题是我的视图 returns 是空的 json

I am using drf, The main problem is that my view returns a empty json

api

django

rest

backend

django-rest-framework