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我正在关注一个为产品处理制作购物车的教程。是将购物车中的商品添加为的功能

@require_POST
def cart_add(request, product_id):
    cart = Cart(request)
    product = get_object_or_404(Product, id=product_id)
    form = CartAddProductForm(request.POST)

    if form.is_valid():
        cd = form.cleaned_data
        cart.add(product=product, quantity=cd['quantity'], update_quantity=cd['update'])

    return redirect('cart:cart_detail')

第二个是

def product_detail(request, id, slug):    
    product = get_object_or_404(Product, id=id, slug=slug, available=True)
    cart_product_form = CartAddProductForm()
    return render(request,'shop/product/detail.html' {'product':product,'cart_product_form': cart_product_form})

如何将这两个代码更改为 ClassBasedViews？什么会更好？使用基于相同功能的视图或 ClasBased？

from django import forms


PRODUCT_QUANTITY_CHOICES = [(i, str(i)) for i in range(1, 21)]


class CartAddProductForm(forms.Form):
    quantity = forms.TypedChoiceField(choices=PRODUCT_QUANTITY_CHOICES, coerce=int)
    update = forms.BooleanField(required=False, initial=False, widget=forms.HiddenInput)

这是forms.py在 CartApp 中。购物车有一个名为的类Cart，它需要request,Product表单。如何使用 CBV 将该信息传递到购物车？

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1 回答 1

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将所有步骤可视化有点困难，但我认为这至少为您提供了一个起点（如果它不能解决您的问题）。您的 2 个基于函数的视图可以替换为一个基于类的视图。您应该知道的唯一一件事是，在您的模板上，您的表单现在可以通过名称form而不是cart_product_form.

class AddCartFormView(FormView):
    template_name = 'shop/product/detail.html'
    form_class = CartAddProductForm()

    def get_success_url(self):
        return reverse('cart:cart_detail')

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # Your form is already inside context by the name of "form"
        context = ['product'] = get_object_or_404(Product, id=product_id, slug=slug, available=True)
        return context

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        cart = Cart(request)
        product = get_object_or_404(Product, id=kwargs.get('product_id'))

        if form.is_valid():
            cd = form.cleaned_data
            cart.add(product=product, quantity=cd['quantity'], update_quantity=cd['update'])
            return self.form_valid(form)
        else:
            return self.form_invalid(form)
于 2019-07-12T07:46:46.437 回答