Overcoming a Challenging 404 Error in Django

The Problem: A Persistent 404 Error
The issue arose when I attempted to access a URL in my Django project and was met with a "Page not found (404)" error. The URL I tried to access was http://127.0.0.1:8000/product/cart, but Django couldn't match it to any URL pattern defined hin my urls.py file.

Here’s a snippet of the error message:
"Page not found (404)
Request Method: GET
Request URL: http://127.0.0.1:8000/product/cart
Using the URLconf defined in ecomprj.urls, Django tried these URL patterns, in this order:

admin/
[name='home']
about/ [name='about']
login/ [name='login']
logout/ [name='logout']
register/ [name='register']
product/int:pk [name='product']
category/str:coo [name='category']
cart/
^media/(?P.*)$"

1. Diagnosing the Problem The error indicated that Django couldn’t find a URL pattern for product/cart. This meant that the pattern product/cart wasn’t defined in the urls.py file. Here’s the relevant portion of my urls.py:

"from django.urls import path
from . import views

urlpatterns = [
path('admin/', admin.site.urls),
path('', views.home, name='home'),
path('about/', views.about, name='about'),
path('login/', views.login, name='login'),
path('logout/', views.logout, name='logout'),
path('register/', views.register, name='register'),
path('product/int:pk/', views.product_detail, name='product'),
path('category/str:coo/', views.category, name='category'),
path('cart/', views.cart, name='cart'),
path('media/path:path/', views.media, name='media'),
]"

1. The Solution: Adding the Missing URL Pattern To resolve this issue, I needed to define the URL pattern for product/cart. Here’s how I approached it:

Update urls.py: I added a new URL pattern for product/cart.

" urlpatterns = [
path('admin/', admin.site.urls),
path('', views.home, name='home'),
path('about/', views.about, name='about'),
path('login/', views.login, name='login'),
path('logout/', views.logout, name='logout'),
path('register/', views.register, name='register'),
path('product/int:pk/', views.product_detail, name='product'),
path('category/str:coo/', views.category, name='category'),
path('cart/', views.cart, name='cart'),
path('product/cart/', views.product_cart, name='product_cart'), # Added this line
path('media/path:path/', views.media, name='media'),
] "

1. Create the Corresponding View: I ensured that there was a corresponding view function for product_cart. "# In views.py from django.shortcuts import render

def product_cart(request):
# Logic for the product cart view
return render(request, 'product_cart.html') "

1. Test the Solution: After making these changes, I restarted the server and navigated to http://127.0.0.1:8000/product/cart. This time, the page loaded successfully without the 404 error.

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