Django URLs

seo-tip-301-redirects-google-search-results.urls.py

from django.conf.urls.defaults import *
from shoppingcart import views

urlpatterns = patterns('shoppingcart.views',
    url(r'^products/(?P<slug>[^\/]+)/$', 
        view=views.product, 
        name='shoppingcart-product'),

    url(r'^\.php\?pid=(?P<slug>[0-9]+)$', 
        view=views.product, 
        name='shopping-cart-old'),
)

seo-tip-301-redirects-google-search-results.views.py

from django.shortcuts import render_to_response, get_object_or_404
from django.http import HttpResponsePermanentRedirect
from django.core.urlresolvers import reverse

def product(request, slug):
    # Product ID where we start 301 Redirects
    redirect_before = 15

    # If slug is numeric, find the product from Product.id
    if slug.isdigit():
        product = get_object_or_404(Product, id=int(slug))

    # If the slug isn't numeric, we find the product from Product.slug
    else:
        product = get_object_or_404(Product, slug=slug)

    # If the Product.id is equal to or less than redirect_before, 
    # we 301 Redirect to our new URL
    if product.id <= redirect_before:
        return HttpResponsePermanentRedirect(reverse('shoppingcart-product', args=[product.slug,]))

    return render_to_response('shoppingcart/product.html', {'product':product})