django继承上下文变量

这里是我的看法，我有根据过滤器的新闻列表

class SingleNewsView(ListView):
model = News
form_class = SearchForm
template_name = "single_news.html"



def get(self, request, pk, **kwargs):
    self.pk = pk

    self.pub_from = request.GET.get('pub_date_from',False)
    self.pub_to = request.GET.get('pub_date_to',False)
    self.crawlers = request.GET.get('crawler',False)


    print self.crawlers


    return super(SingleNewsView,self).get(request,pk, **kwargs)



def get_context_data(self, **kwargs):

    context = super(SingleNewsView,self).get_context_data(**kwargs)
    context["form"] = SearchForm#(self.request.GET)
    if self.pub_from and self.pub_to and self.crawlers:
        context["something"] = News.objects.filter(category_id=self.pk).filter(published_date__range=(self.pub_from,self.pub_to), crawler=self.crawlers)
    else:
        context["something"] = News.objects.filter(category_id=self.pk)

    return context

现在我可以从上下文[“某物”]下载查询的新闻列表

现在，在writer.writerow中的def CSVView中，我希望第一个视图中包含上下文[“something”]。我不知道怎么做。我想下载csv格式的新闻。谁有更好的主意？我做错什么了吗

---

我尝试过def-CSVView（request，SingleNewsView）：但它说st-def-CSVView只接受2个参数1个给定的错误。我该怎么办。如何下载csv格式的新闻

正如我所评论的，您应该省略上下文的用法，在本例中，您需要的是会话，下面是代码的外观：

class SingleNewsView(ListView):
    model = News
    form_class = SearchForm
    template_name = "single_news.html"


    def get(self, request, pk, **kwargs):
        self.pk = pk

        self.pub_from = request.GET.get('pub_date_from',False)
        self.pub_to = request.GET.get('pub_date_to',False)
        self.crawlers = request.GET.get('crawler',False)

        if self.pub_from and self.pub_to and self.crawlers:
            value = News.objects.filter(category_id=self.pk).filter(published_date__range=(self.pub_from,self.pub_to), crawler=self.crawlers)  
        else:
            value= News.objects.filter(category_id=self.pk)
        self.request.session.set("somekey",value)
        return super(SingleNewsView,self).get(request,pk, **kwargs)


def CSVView(request):

    response = HttpResponse(content_type="text/csv")
    response["Content-Disposition"] = 'attachment; filename=somefilename.csv"'
    writer = csv.writer(response)
    writer.writerow(self.request.session.get("somekey"))

    return response

---

似乎您缺少了一些内容，如果您想将某个内容从一个视图“传递”到另一个视图，请使用会话。我可以执行一些\u val=request.session[something]”会话吗？我执行了一些\u val=request.session.get（“something”）并打印了一些\u val。但它打印为False。为什么？我无法获取上下文的值[“something”]你应该完全省略上下文，见下面我的答案

class SingleNewsView(ListView):
    model = News
    form_class = SearchForm
    template_name = "single_news.html"


    def get(self, request, pk, **kwargs):
        self.pk = pk

        self.pub_from = request.GET.get('pub_date_from',False)
        self.pub_to = request.GET.get('pub_date_to',False)
        self.crawlers = request.GET.get('crawler',False)

        if self.pub_from and self.pub_to and self.crawlers:
            value = News.objects.filter(category_id=self.pk).filter(published_date__range=(self.pub_from,self.pub_to), crawler=self.crawlers)  
        else:
            value= News.objects.filter(category_id=self.pk)
        self.request.session.set("somekey",value)
        return super(SingleNewsView,self).get(request,pk, **kwargs)


def CSVView(request):

    response = HttpResponse(content_type="text/csv")
    response["Content-Disposition"] = 'attachment; filename=somefilename.csv"'
    writer = csv.writer(response)
    writer.writerow(self.request.session.get("somekey"))

    return response