Question

我有一种情况，我想在我的CreateView中添加一个额外的模型。我们有一个入门订单系统允许某人添加订单然后将项目添加到该订单。通常，当有人为第一个订单添加订单时他们还希望将时间项添加到该订单中，因此我希望将这些模型组合成一个表单并进行处理在初始订单输入。当表单无法验证时，我遇到了问题。

我已经覆盖了get_context_data以将项目表单添加到模板中，并且我已经重写了post来处理额外的表单。但当表单无效时，我需要重新渲染传递POST数据的原始表单。什么是覆盖的首选方式 get_context_data是为了使用/不使用POST数据来呈现表单？我应该这样做吗？

def get_context_data(self, **kwargs):
    context = super(OrderAdd, self).get_context_data(**kwargs)
    if self.request.method == 'POST':
        item_form = ItemForm(self.request.POST, prefix='item')
    else:
        item_form = ItemForm(prefix='item')
    context['item_form'] = item_form
    return context

这是我的CreateView的当前形式，我目前卡住了。

class OrderAdd(CreateView):
    model = Order
    form_class = OrderForm
    context_object_name = 'object'
    template_name = 'form.html'

    def get_context_data(self, **kwargs):
        context = super(OrderAdd, self).get_context_data(**kwargs)
        item_form = ItemForm(prefix='item')
        context['item_form'] = item_form
        return context

    def post(self, request, *args, **kwargs):
        order_form = OrderForm(request.POST)
        item_form = ItemForm(request.POST, prefix='item')

        if order_form.is_valid() and item_form.is_valid():
            return self.form_valid(order_form)
        else:
            context = self.get_context_data()
            return render(self.request, 'form.html', context)

Answer 1

一种略显不雅的方法：

def get_context_data(self, **kwargs):
    context = super(OrderAdd, self).get_context_data(**kwargs)
    if self.request.method == 'POST':
        return context
    else:
        item_form = ItemForm(prefix='item')
        context['item_form'] = item_form
        return context

def post(self, request, *args, **kwargs):
    order_form = OrderForm(request.POST)
    item_form = ItemForm(request.POST, prefix='item')

    if order_form.is_valid() and item_form.is_valid():
        return self.form_valid(order_form)
    else:
        context = self.get_context_data()
        context['item_form'] = item_form
        return render(self.request, 'form.html', context)

另一种选择：

def get_context_data(self, **kwargs):
    context = super(OrderAdd, self).get_context_data(**kwargs)
    if self.request.method == 'POST':
        item_form = ItemForm(self.request.POST, prefix='item')
    else:
        item_form = ItemForm(prefix='item')
    context['item_form'] = item_form
    return context

def post(self, request, *args, **kwargs):
    order_form = OrderForm(request.POST)
    context = self.get_context_data()
    item_form = context['item_form']

    if order_form.is_valid() and item_form.is_valid():
        return self.form_valid(order_form)
    else:
        return render(self.request, 'form.html', context)

使用具有基于类的视图的多个ModelForms

1 个答案: