Question

当我尝试在Django的数据库中保存帖子时出现此错误。

我在做什么错，我该如何解决？

在/ account / create-post处的
AttributeError

'str'对象没有属性'data'

我有这个字段

我的模特：

class Post(models.Model):
    created_date = models.DateTimeField()
    title = models.CharField(max_length=100)
    profile_image = models.ImageField(upload_to='poze', blank=True, null=True)
    text = models.CharField(max_length=1000, default='Nimic', blank=True)
    user = models.ForeignKey(UserProfile, on_delete=models.CASCADE)

查看：

class CreatePost(APIView):
    renderer_classes = [TemplateHTMLRenderer]
    template_name = 'create_post.html'

    def get(self,request):
        serializer=CreatePostSerializer()
        return Response({'fields':serializer})

    def post(self, request):
        serializer = CreatePostSerializer(data=request.data)
        if not serializer.is_valid():
            return Response({'serializer': serializer.data})

        user = UserProfile.objects.filter(username=request.user.username).first()
        serializer.save(user=user)
        return redirect('mainPage')

Create_post.html：

    {% extends 'base.html' %}
{% load rest_framework %}

{% block content %}
<div class="offset-3 col-md-6">
<form action="{% url 'create_post' %}" method="POST">
    <div class="form-group">

    {% csrf_token %}
    {% render_form fields %}

</div>
   <button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
{% endblock %}

URL：

 url(r'create-post$', login_required(CreatePost.as_view()), name='create_post'),

控制台中的内容：

  Internal Server Error: /account/create-post Traceback (most recent call last):   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\exception.py", line 35, in inner
    response = get_response(request)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\base.py", line 158, in _get_response
    response = self.process_exception_by_middleware(e, request)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\base.py", line 156, in _get_response
    response = response.render()   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\response.py", line 106, in render
    self.content = self.rendered_content   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\response.py", line 72, in rendered_content
    ret = renderer.render(self.data, accepted_media_type, context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\renderers.py", line 176, in render
    return template.render(context, request=request)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\backends\django.py", line 61, in render
    return self.template.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 175, in render
    return self._render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 167, in _render
    return self.nodelist.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 943, in render
    bit = node.render_annotated(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 910, in render_annotated
    return self.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\loader_tags.py", line 155, in render
    return compiled_parent._render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 167, in _render
    return self.nodelist.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 943, in render
    bit = node.render_annotated(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 910, in render_annotated
    return self.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\loader_tags.py", line 67, in render
    result = block.nodelist.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 943, in render
    bit = node.render_annotated(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\base.py", line 910, in render_annotated
    return self.render(context)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\django\template\library.py", line 192, in render
    output = self.func(*resolved_args, **resolved_kwargs)   File "C:\Users\Intern\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\templatetags\rest_framework.py", line 84, in render_form
    return renderer.render(serializer.data, None, {'style': style}) AttributeError: 'str' object has no attribute 'data' [10/Aug/2018 17:51:09] "POST /account/create-post HTTP/1.1" 500 147258

Answer 1

问题似乎出在View中的函数中：

def post(self, request):
    serializer = CreatePostSerializer(data=request.data) <---- ERROR
    if not serializer.is_valid():
        return Response({'serializer': serializer.data})

request参数的类型为str，不是对象，因此，在尝试访问{{1}的不存在的AttributeError属性时，data }。我对Django并不完全熟悉，但是根据我对HTTP请求和客户端服务器“材料”的一些了解，我假设str作为字符串传递，并且需要解析并转换为对象。

Answer 2

Django rest框架会寻找render_form模板标签，以渲染Serializer。

可以使用render_form模板标签将序列化器呈现为表单，并包括序列化器实例作为模板的上下文。

https://www.django-rest-framework.org/topics/html-and-forms/

自此，您将其命名为fields。发布后应该是

return Response({'fields':serializer})

所以

class CreatePost(APIView):
    renderer_classes = [TemplateHTMLRenderer]
    template_name = 'Create_post.html'

    def get(self,request):
        serializer=serializers.CreatePOSTS()
        return Response({'fields':serializer})

    def post(self, request):
        serializer = serializers.CreatePOSTS(data=request.data)
        if not serializer.is_valid():
            return Response({'fields':serializer}) #forms + serializer errors. :)
        user = customers.objects.filter(username=request.user.username).first()
        serializer.save(user=user)
        return redirect('mainPage')

希望这会有所帮助：）

Answer 3

在您的 views.py 中尝试一下：

class CreatePost(APIView):
    renderer_classes = [TemplateHTMLRenderer]
    template_name = 'create_post.html'

    def get(self,request):
        serializer=CreatePostSerializer
        return Response({'serializer':serializer})

    def post(self, request):
        serializer = CreatePostSerializer(data=request.data)
        if not serializer.is_valid():
            return Response({'serializer': serializer})

        user = UserProfile.objects.filter(username=request.user.username).first()
        serializer.save(user=user)
        return redirect('mainPage')

在您的 create_post.html 使用中：

{% extends 'base.html' %}
{% load rest_framework %}

{% block content %}
<div class="offset-3 col-md-6">
<form action="{% url 'create_post' %}" method="POST">
    <div class="form-group">

    {% csrf_token %}
    {% render_form serializer %}

</div>
   <button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
{% endblock %}

希望有帮助。

Django“ str”对象没有修饰符“ data”

3 个答案: