Question

我无法让Django urlpatterns将变量作为变量捕获，而是将其作为设置URL。

urlpatterns的：

    urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^about/', views.about),
    url(r'^views/available_products/',  views.available_products),
    url(r'^views/productview/<int:product_id>/', views.productview)
]

当我托管服务器并转到/ about /，/ views / available_products /或/ admin /它们工作正常，但尝试转到/ views / productview / 1 /会出现404错误，而转到/ views / productview //给出了一个缺失的参数-error。

我试着阅读文档，并没有明确告诉我为什么我的url变量参数不起作用，但显然我做了一些根本错误的事情。

以下是调试页面的示例错误消息：

Page not found (404)
Request Method: GET
Request URL:    http://localhost:8000/views/productview/12/
Using the URLconf defined in firstdjango.urls, Django tried these URL patterns, in this order:

^admin/
^about/
^views/available_products/
^views/productview/<int:product_id>/
The current path, views/productview/12/, didn't match any of these.

这是相同的错误消息，但我尝试使用的URL与urlpatterns中的相同：

TypeError at /views/productview/<int:product_id>/
productview() missing 1 required positional argument: 'product_id'
Request Method: GET
Request URL:    http://localhost:8000/views/productview/%3Cint:product_id%3E/
Django Version: 1.11.8
Exception Type: TypeError
Exception Value:    
productview() missing 1 required positional argument: 'product_id'
Server time:    Sat, 10 Feb 2018 12:25:21 +0000

views.py：

    from django.http import HttpResponse, Http404
from django.shortcuts import render

def starting_instructions(request):
    return render(request, "webshop/instructions.html", {})

def about(request):
    return HttpResponse("about page")

def productview(request, product_id):
    """
    Write your view implementations for exercise 4 here.
    Remove the current return line below.
    """
    return HttpResponse("product {}".format(product_id))

def available_products(request):
    """
    Write your view implementations for exercise 4 here.
    Remove the current return line below.
    """
    return HttpResponse("View not implemented!")

Answer 1

此网址未正确翻译。

请参阅Request URL: http://localhost:8000/views/productview/%3Cint:product_id%3E/

您可以使用eighter path或re_path（类似于url，您可以在其中使用正则表达式，以便在url中使用）。所以将你的urlpatterns改为。

from django.urls import path

urlpatterns = [
    path('admin/', admin.site.urls),
    path('about/', views.about),
    path('views/available_products/',  views.available_products),
    path('views/productview/<int:product_id>/', views.productview)
]

修改

或者如果您真的想使用网址，请使用

url('^views/productview/(?P<product_id>\d+)/$', views.productview)

但使用path是Django 2.0+方法。同时将url替换为相同的re_path。

Django url变量捕获

1 个答案: