Python 变量，用于获取TemplateView的\u context\u data（）方法

在第页bills.html上，我有一张表格（action-order\u page.html）

在页面order\u page.html我有表单，其中一个字段必须具有来自bills.html`s表单的值

视图。py:

class OrderPage(TemplateView):
    template_name = 'order_page.html'
    form_class = BillAmount

    def post(self, request, *args, **kwargs):
        context = self.get_context_data()
        form = self.form_class(request.POST)

        if form.is_valid():
            amount = form.cleaned_data['sum'] # this value I need in get_context_data()

        return super(OrderPage, self).render_to_response(context)

    def get_context_data(self, **kwargs):

        amount = 2314 # here I need value from post()

        ctx = super(OrderPage, self).get_context_data(**kwargs)
        ctx['form'] = FinishPaymentForm(instance=payment) # another form
        return ctx

我不知道该怎么做。我尝试了post（）：

OrderPage.amount=N

和许多其他变体，但它们不起作用

如何做到这一点

谢谢

试试这个：

class OrderPage(TemplateView):
    ...
    amount = None

    def post(self, request, *args, **kwargs):
        ...

        if form.is_valid():
            self.amount = form.cleaned_data['sum']
        ...

    def get_context_data(self, **kwargs):

        # Here you can use self.amount
        ...