NoReverseMatch at / product_view / 1 /反向'cart_add'，参数'（''，）'未找到。尝试了1种模式：[u'cart / add /（？P <product_id> \\ d +）/ $']

Question

我正在创建一个在线购物商城但是当我尝试加载我的产品页面时，我收到以下错误。我相信错误指向我的命名空间，但我试图纠正它的每一种方式，我仍然得到错误

Internal Server Error: /product_view/1/
Traceback (most recent call last):
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/agozie/Desktop/shoppingmall/shop/views.py", line 18, in product_view
    'cart_product_form': cart_product_form})
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/shortcuts.py", line 30, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/loader.py", line 68, in render_to_string
    return template.render(context, request)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/backends/django.py", line 66, in render
    return self.template.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 207, in render
    return self._render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 199, in _render
    return self.nodelist.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 990, in render
    bit = node.render_annotated(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/loader_tags.py", line 177, in render
    return compiled_parent._render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 199, in _render
    return self.nodelist.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 990, in render
    bit = node.render_annotated(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/loader_tags.py", line 72, in render
    result = block.nodelist.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 990, in render
    bit = node.render_annotated(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/defaulttags.py", line 216, in render
    nodelist.append(node.render_annotated(context))
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/template/defaulttags.py", line 458, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/urls/base.py", line 91, in reverse
    return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
  File "/home/agozie/anaconda3/envs/env1/lib/python2.7/site-packages/django/urls/resolvers.py", line 497, in _reverse_with_prefix
    raise NoReverseMatch(msg)
NoReverseMatch: Reverse for 'cart_add' with arguments '('',)' not found. 1 pattern(s) tried: [u'cart/add/(?P<product_id>\\d+)/$']
[14/Aug/2017 20:29:03] "GET /product_view/1/ HTTP/1.1" 500 186275

我有两个应用程序。购物车和商店。以下是我对购物车应用的看法：

@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')

def cart_remove(request, product_id):
    cart = Cart(request)
    product = get_object_or_404(Product, id=product_id)
    cart.remove(product)
    return redirect("cart:cart_detail")

def cart_detail(request):
    cart = Cart(request)
    return render(request, 'cart/detail.html', {'cart':cart})

这是购物车应用的urls.py

urlpatterns = [
    url(r'^$', views.cart_detail, name='cart_detail'),
    url(r'^add/(?P<product_id>\d+)/$', views.cart_add, name='cart_add'),
    url(r'^remove/(?P<product_id>\d+)/$', views.cart_remove, name='cart_remove'),
]

我项目的urls.py

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^', include('shop.urls')),
    url(r'^cart/', include('cart.urls', namespace='cart')),
    url(r'^accounts/', include('registration.backends.default.urls')),
]

以下是引发错误的模板

{% extends 'shop/base.html' %}
{% load static %}

{% block title_block %}
    Product View
{% endblock %}

{% block body_block %}
    {% for p in product %}
        {{ p.name }}
        {{ p.brand }}
        {{ p.style }}
        <p class="price">${{ product.price }}</p>
        <form action="{% url 'cart:cart_add' product.id %}" method="post">
          {{ cart_product_form }}
          {% csrf_token %}
          <input type="submit" value="Add to cart">
        </form>
    {% endfor %}
{% endblock %}

Answer 1

尝试为您的tell application "Safari" tell window 1 set current tab to make new tab with properties {URL:""} do JavaScript "" in current tab end tell quit end tell命名，因为Django需要关键字参数才能解析您的网址。

在你的模板中： product_id

我认为this link会对您有所帮助。

此外，您正在迭代产品<form acition="{% url 'cart:card_add' product_id=p.id %}" method="post">，然后访问{% for p in product %}和其他人，但随后您访问p.name。尝试将product.price替换为product.id（p.id替换为product.price）。

Answer 2

我建议您将product_id作为id传递回模板，该模板会在那里提供id。然后你可以用它来解决反向网址。

@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')

{% url "product-edit" product_id %}