如何解决TypeError:类型为“ TopicSerializer”的对象不是JSON可序列化的Django
您好,我在获得API响应时遇到了这个问题。我正在使用django==2.1.7
。在下面,我添加了我的代码段
models.py
模型包含主题名称(en,bn),标签列表(string)和Bucket_id或topic_id
class Topics(models.Model):
id = models.AutoField(primary_key=True)
name_en = models.CharField(max_length=70,blank=False,default='')
name_bn = models.CharField(max_length=70,default='')
tags = models.TextField(blank=False,default='')
bucket_id = models.IntegerField()
def set_tags(self,x):
self.tags = json.dumps(x)
def get_tags(self):
return json.loads(self.tags)
class Meta:
managed = True
db_table = 'follow_topics'
serialize.py
用于JSON序列化模型的TopicSeializer
from rest_framework import serializers
from .models import Topics
class TopicSerializer(serializers.ModelSerializer):
class Meta:
model = Topics
fields = ['name_en','name_bn','tags','bucket_id']
views.py
@api_view(('GET',))
def get_topics(requests):
topic_id = requests.GET.get('topic_id',None)
post_data = Topics.objects.filter(bucket_id=topic_id)
serialize_data = TopicSerializer(post_data,many=True)
return Response({"status": "success","data": serialize_data})
我遇到了可序列化的错误。这个错误让我感到沮丧。请帮助我分享一些有用的资源或解决此错误的方法
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/Feed/v1/get_topics?topic_id=2
Django Version: 2.1.7
Python Version: 3.6.8
Installed Applications:
['django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','debug_toolbar','rest_framework','Feedv1']
Installed Middleware:
['django.middleware.security.SecurityMiddleware','django.contrib.sessions.middleware.SessionMiddleware','django.middleware.common.CommonMiddleware','django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware','corsheaders.middleware.CorsMiddleware','django.middleware.common.brokenLinkEmailsMiddleware','debug_toolbar.middleware.DebugToolbarMiddleware']
Traceback:
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
156. response = self.process_exception_by_middleware(e,request)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
154. response = response.render()
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/django/template/response.py" in render
106. self.content = self.rendered_content
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/response.py" in rendered_content
72. ret = renderer.render(self.data,accepted_media_type,context)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/renderers.py" in render
733. context = self.get_context(data,renderer_context)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/renderers.py" in get_context
688. 'content': self.get_content(renderer,data,renderer_context),File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/renderers.py" in get_content
424. content = renderer.render(data,renderer_context)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/renderers.py" in render
107. allow_nan=not self.strict,separators=separators
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/utils/json.py" in dumps
28. return json.dumps(*args,**kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/__init__.py" in dumps
238. **kw).encode(obj)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/encoder.py" in encode
201. chunks = list(chunks)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/encoder.py" in _iterencode
430. yield from _iterencode_dict(o,_current_indent_level)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/encoder.py" in _iterencode_dict
404. yield from chunks
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/encoder.py" in _iterencode
437. o = _default(o)
File "/Users/luo/tutorial-env/lib/python3.6/site-packages/rest_framework/utils/encoders.py" in default
68. return super(JSONEncoder,self).default(obj)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/encoder.py" in default
180. o.__class__.__name__)
Exception Type: TypeError at /Feed/v1/get_topics
Exception Value: Object of type 'TopicSerializer' is not JSON serializable
解决方法
您需要访问序列化程序的 .data
属性
return Response({"status": "success","data": serialize_data.data})
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