'CheckoutView' 对象没有属性 'object' [英] 'CheckoutView' object has no attribute 'object'

问题描述

我没有收到属性对象"错误

这里是views.py

class CheckoutView(FormMixin , DetailView):型号 = 购物车template_name = "购物车/checkout_view.html"form_class = GuestCheckoutFormdef get_object(self , *args , **kwargs):如果 self.request.user.is_authenticated():尝试:购物车 = Cart.objects.get(user__username=self.request.user)除了:购物车 = 无如果购物车 == 无:HttpResponseRedirect(反向(购物车"))别的:cart_id = self.request.session.get("cart_id")如果cart_id == 无:HttpResponseRedirect(反向(购物车"))购物车 = Cart.objects.get(id=cart_id)返回购物车def get_context_data(self ,*args, **kwargs):context = super(CheckoutView, self).get_context_data(*args, **kwargs)user_can_continue = 假如果不是 self.request.user.is_authenticated():上下文[登录表单"] = AuthenticationForm()上下文[next_url"] = self.request.build_absolute_uri()如果 self.request.user.is_authenticated():user_can_continue = 真上下文[user_can_continue"] = user_can_continuecontext["form"] = self.get_form()返回上下文def post(self , request , *args , **kwargs):form = self.get_form()如果 form.is_valid():email = form.cleaned_data.get("email")返回 self.form_valid(form)别的:返回 self.form_invalid(form)def get_success_url(self):返回反向('结帐')

这是模板

{% csrf_token %}{{形式 |酥脆}}<input type="submit" class="btn btn-success" value="continue"></表单>

这里是回溯

get_response 中的文件C:Python27libsite-packagesdjangocorehandlersase.py"132.响应=wrapped_callback(请求，*callback_args，**callback_kwargs)视图中的文件C:Python27libsite-packagesdjangoviewsgenericase.py"71. 返回 self.dispatch(request, *args, **kwargs)调度中的文件C:Python27libsite-packagesdjangoviewsgenericase.py"89. 返回处理程序(请求，*args，**kwargs)帖子中的文件C:UserslenovoDesktopplumpPlumpinsrccartsviews.py"151. return self.form_invalid(form)form_invalid 中的文件C:Python27libsite-packagesdjangoviewsgenericedit.py"115. 返回 self.render_to_response(self.get_context_data(form=form))get_context_data 中的文件C:UserslenovoDesktopplumpPlumpinsrccartsviews.py"133. context = super(CheckoutView, self).get_context_data(*args, **kwargs)get_context_data 中的文件C:Python27libsite-packagesdjangoviewsgenericdetail.py"101.如果self.object:异常类型:/checkout/处的 AttributeError异常值:'CheckoutView' 对象没有属性 'object'

我该如何解决上述问题?在这里，我正在尝试使用 post 方法提交表单，但出现上述错误

谢谢

解决方案

您需要使用 .get_object() 将 object 分配给您的视图 .get_object()您的视图的代码>发布方法.

这是因为 Django 的 get_context_data() 函数使用 object 将其传递到上下文中.如果POST 请求出错，这个函数会被调用，它会寻找你没有分配的self.object，从而导致错误.

class CheckoutView(FormMixin , DetailView):型号 = 购物车template_name = "购物车/checkout_view.html"form_class = GuestCheckoutForm...def post(self , request , *args , **kwargs):self.object = self.get_object() # 将对象分配给视图form = self.get_form()如果 form.is_valid():email = form.cleaned_data.get("email")返回 self.form_valid(form)别的:返回 self.form_invalid(form)

此外，最好在此处使用 UpdateView 而不是 DetailView.

I am getting no attribute 'object' error'

here is views.py

class CheckoutView(FormMixin , DetailView):
    model = Cart
    template_name = "carts/checkout_view.html"
    form_class = GuestCheckoutForm


    def get_object(self , *args , **kwargs):
        if self.request.user.is_authenticated():
            try:
                cart = Cart.objects.get(user__username=self.request.user)
            except:
                cart = None

            if cart == None:
                HttpResponseRedirect(reverse("cart"))

        else:
            cart_id = self.request.session.get("cart_id")
            if cart_id == None:
                HttpResponseRedirect(reverse("cart"))

            cart = Cart.objects.get(id=cart_id)

        return cart

    def get_context_data(self ,*args , **kwargs):
        context = super(CheckoutView , self).get_context_data(*args , **kwargs)
        user_can_continue = False
        if not self.request.user.is_authenticated():
            context["login_form"] = AuthenticationForm()
            context["next_url"] =  self.request.build_absolute_uri()
        if self.request.user.is_authenticated():
            user_can_continue = True

        context["user_can_continue"] = user_can_continue
        context["form"] = self.get_form()
        return context

    def post(self , request , *args , **kwargs):
        form = self.get_form()
        if form.is_valid():
            email = form.cleaned_data.get("email")
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

    def get_success_url(self):
        return reverse('checkout')

here is the template

<form method="POST" action="">
{% csrf_token %}
{{form | crispy }}
<input type="submit" class="btn btn-success" value="continue">
</form>
</div>

here is the traceback

File "C:Python27libsite-packagesdjangocorehandlersase.py" in get_response
  132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:Python27libsite-packagesdjangoviewsgenericase.py" in view
  71.             return self.dispatch(request, *args, **kwargs)
File "C:Python27libsite-packagesdjangoviewsgenericase.py" in dispatch
  89.         return handler(request, *args, **kwargs)
File "C:UserslenovoDesktopplumpPlumpinsrccartsviews.py" in post
  151.          return self.form_invalid(form)
File "C:Python27libsite-packagesdjangoviewsgenericedit.py" in form_invalid
  115.         return self.render_to_response(self.get_context_data(form=form))
File "C:UserslenovoDesktopplumpPlumpinsrccartsviews.py" in get_context_data
  133.      context = super(CheckoutView , self).get_context_data(*args , **kwargs)
File "C:Python27libsite-packagesdjangoviewsgenericdetail.py" in get_context_data
  101.         if self.object:

Exception Type: AttributeError at /checkout/
Exception Value: 'CheckoutView' object has no attribute 'object'

how can i solve the above problem? here i am trying submit the form using post method but i am getting the above error

Thank You

解决方案

You need to assign object to your view using .get_object() in the post method of your view.

This is because Django's get_context_data() function uses the object to pass it into the context. In case of errors in POST request, this function will be called and it will look for self.object which you did not assign, thereby leading to the error.

class CheckoutView(FormMixin , DetailView):
    model = Cart
    template_name = "carts/checkout_view.html"
    form_class = GuestCheckoutForm

    ...

    def post(self , request , *args , **kwargs):
        self.object = self.get_object() # assign the object to the view
        form = self.get_form()
        if form.is_valid():
            email = form.cleaned_data.get("email")
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

Also, it would be better to use UpdateView here instead of DetailView.

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