我使用的是drf，主要问题是我的视图返回了一个空的json

Question

我的主要观点是我的视图返回一个空的json。我想要我的博客有各自的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

我的序列化程序.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) 

我的回应：

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

它给了我空的json，我希望我的博客有各自的foreign_key user_id。

Answer 1

CustomUser是您的AbstractBaseUser吗？

因为request.user将返回一个经过身份验证的AbstractBaseUser。

顺便说一下，您可以使用request.user_id而不是request.user.id(您可以少做1个查询(。

对于你的view.py，我会这样写：

• 使用BlogSerializer而不是AddBlogSerializer
• 只是return serializer.data不需要JSONRenderer()，因为它是BlogSerializer的工作

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

为我工作的最佳解决方案试试看：

write_only=True阻止序列化程序返回读取值。请考虑将它从您希望返回给客户端的任何字段中删除。

您的序列化程序应该是：

类AddBlogSerializer(序列化程序.ModelSerializer(：title=序列化程序。CharField(max_length=128，required=True，error_messages=｛'blank'："请提供标题"｝(author=序列化程序。CharField(max_length=128，required=True，error_messages=｛'blank'："请提供作者"｝(description=序列化程序。CharField(max_length=128，required=True，error_messages=｛'blank'："请提供描述"｝(image=序列化程序。FileField(必需=True，error_messages=｛无效：请上传图像、视频或音频文件｝(

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

现在，它将返回您的json数据