“NewPost”对象没有属性“user”（已关闭）

Question

class NewPost(CreateView):
    form_class = PostForm
    template_name = 'post_form.html'

@login_required
def form_valid(self,form):
    post = form.save(commit=False)
    post.user= self.request.user
    post.save()
    return redirect('website:details', post=post)

class PostForm(forms.ModelForm):

    class Meta:
        model = Post
        fields=('title','description')

class Post(models.Model):
    user =  models.ForeignKey(User, on_delete =models.CASCADE)
    title = models.CharField(max_length = 500, blank = False)
    description = models.TextField()

def __str__(self):
    return self.title

<div class ="container-fluid">
<form method="post">
    {% csrf_token %}

    {{ form.as_p }}
    <input type="submit" value="Save">
</form>
</div>

AttributeError at /website/add/ <br>
'NewPost' object has no attribute 'user'<br>
Request Method: POST <br>
Request URL:    http://127.0.0.1:8000/website/add/<br>
Django Version: 1.9 <br>
Exception Type: AttributeError <br>
Exception Value:    <br>
'NewPost' object has no attribute 'user' <br>
Exception Location: C:\Python27\lib\site-packages\django-1.9-py2.7.egg\django\contrib\auth\decorators.py in _wrapped_view, line 22 <br>
Python Executable:  C:\Python27\python.exe<br>
Python Version: 2.7.14 <br>
Python Path:    <br>
['C:\\Users\\as_couple\\Desktop\\STUDENTTRACKERSYSTEM',
 'C:\\WINDOWS\\SYSTEM32\\python27.zip',
 'C:\\Python27\\DLLs',<br>
 'C:\\Python27\\lib',<br>
 'C:\\Python27\\lib\\plat-win',<br>
 'C:\\Python27\\lib\\lib-tk',<br>
 'C:\\Python27', <br>
 'C:\\Python27\\lib\\site-packages', <br>
 'C:\\Python27\\lib\\site-packages\\django_admin-1.1.1-py2.7.egg', <br>
 'C:\\Python27\\lib\\site-packages\\django_excel_response2-2.0.8-py2.7.egg',<br>
 'C:\\Python27\\lib\\site-packages\\django_six-1.0.4-py2.7.egg',<br>
 'C:\\Python27\\lib\\site-packages\\django-1.9-py2.7.egg']<br>

更新的文件:

回溯:`文件“c:\python27\lib\site-packages\django-1.9-py2.7.eg\django\core\handlers\base.py”在get_response 149中。响应=self.process_exception_by_middleware(e，request)

get_response 147中的文件“C:\python27\lib\site-packages\django-1.9-py2.7.eg\django\core\handlers\base.py”。响应=wrapped_callback(request，*callback_args，**callback_kwargs)

视图68中的文件“C:\python27\lib\site-packages\django-1.9-py2.7.eg\django\views\generic\base.py”。返回self.dispatch(request，*args，**kwargs)

post 255中的文件“C:\python27\lib\site-packages\django-1.9-py2.7.eg\django\views\generic\edit.py”。返回super（BaseCreateView,self）.post（request,*args,**kwargs）

文件“C:\python27\lib\site-packages\django-1.9-py2.7.eg\django\views\generic\edit.py”在后221中。返回self.form_valid(form)

文件“C:\python27\lib\site-packages\django-1.9-py2.7.egg\django\contrib\auth\decorators.py”在_wrapped_view 22中。如果test_func(request.user):

Answer 1

我以为

class NewPost(CreateView):
    form_class = PostForm
    template_name = 'post_form.html'

@login_required
def form_valid(self,form):
    post = form.save(commit=False)
    post.user= self.request.user
    post.save()
    return redirect('website:details', post=post)

是未缩进的，并且def form_valid是类的一个方法。使用基于类的视图时，不能直接修饰方法。相反，您需要修饰分派，如下所示

class NewPost(CreateView):
    form_class = PostForm
    template_name = 'post_form.html'

def form_valid(self,form):
    post = form.save(commit=False)
    post.user= self.request.user
    post.save()
    return redirect('website:details', post=post)

@method_decorator(login_required)
def dispatch(self, *args, **kwargs):
    return super(NewPost, self).dispatch(*args, **kwargs)

也就是说，错误不是在form_valid中激发的，而是在装饰器代码中激发的