Django 产品从1.X升级到2.X的移植

顾翔

发布于 2019-12-11 15:21:13

6700

发布于 2019-12-11 15:21:13

关于Django可以参阅我在清华大学出版社出版的书《基于Django的电子商务网站技术》一书。在书中我采用的版本是1.11.4，后来Django升级到了1.11.10，产品仍旧可以正常执行，但是当我把Django升级到2.X版本后，程序就不能运行了，参考了一下网上的资料，发现主要2.0的在路由方面做了改动。在1.X版本中，我们在url.py文章中使用的是fromdjango.conf.urls类url方法。在书中我采用如下代码：

from django.conf.urls import urlfrom django.contrib import adminfrom goods import views from django.views import staticimport os BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) urlpatterns = [ url(r'^$', views.index), url(r'^index/$', views.index), url(r'^admin/', admin.site.urls), url(r'^logout/$', views.logout), url(r'^register/$', views.register), url(r'^user_info/$', views.user_info), url(r'^login_action/$', views.login_action), url(r'^search_name/$', views.search_name), url(r'^change_password/$', views.change_password), url(r'^goods_view/$', views.goods_view), url(r'^view_goods/(?P<good_id>[0-9]+)/$', views.view_goods), url(r'^view_chart/$', views.view_chart), url(r'^remove_chart_all/$', views.remove_chart_all), url(r'^remove_chart/(?P<good_id>[0-9]+)/$', views.remove_chart), url(r'^add_chart/(?P<good_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.add_chart), url(r'^update_chart/(?P<good_id>[0-9]+)/$', views.update_chart), url(r'^view_address/$', views.view_address), url(r'^add_address/(?P<sign>[0-9]+)/$', views.add_address), url(r'^delete_address/(?P<address_id>[0-9]+)/(?P<sign>[0-9]+)/$',views.delete_address), url(r'^update_address/(?P<address_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.update_address), url(r'^delete_orders/(?P<orders_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.delete_orders), url(r'^create_order/$', views.create_order), url(r'^view_order/(?P<orders_id>[0-9]+)/$', views.view_order), url(r'^view_all_order/$', views.view_all_order), url(r'^upload/(?P<path>.*)',static.serve,{'document_root':os.path.join(BASE_DIR,'upload')}), url(r'^static/(?P<path>.*)',static.serve,{'document_root':os.path.join(BASE_DIR,'static')}),]

而在2.X中被from django.urls 中的 path与re_path类取代，关于re_path方法基本上与url方法保持一致，但是不支持static.serve了，而对于path方法不支持正则表达式，主要介绍如下。

应用方法：

from django.urls import path,re_path

使用：

path('view_goods/<int: good_id >/', views.view_goods),

对应于

url(r'^view_goods/(?P<good_id>[0-9]+)/$', views.view_goods),

我们可以看出，这里的：

view_goods：为路径名；
<int: good_id >：int表示数字，参数名为good_id；
views.view_goods仍旧表示为view.py中的view_goods方法中定义的逻辑。

关于int共有以下五类（这五类Django称作转换器）：

str,匹配除了路径分隔符（/）之外的非空字符串，这是默认的形式
int,匹配正整数，包含0。
slug,匹配字母、数字以及横杠、下划线组成的字符串。
uuid,匹配格式化的uuid，如075194d3-6885-417e-a8a8-6c931e272f00。
path,匹配任何非空字符串，包含了路径分隔符（/）（不能用问号，因为问号在url地址有特殊含义。）

这样我的代码就变成了如下形式。

from django.conf.urls import urlfrom django.urls import re_pathfrom django.contrib import adminfrom goods import views from django.views import staticimport osfrom django.conf.urls.static import staticfrom . import settings urlpatterns = [ re_path(r'^$', views.index), re_path(r'^index/$', views.index), re_path(r'^admin/', admin.site.urls), re_path(r'^logout/$', views.logout), re_path(r'^register/$', views.register), re_path(r'^user_info/$', views.user_info), re_path(r'^login_action/$', views.login_action), re_path(r'^search_name/$', views.search_name), re_path(r'^change_password/$', views.change_password), re_path(r'^goods_view/$', views.goods_view), re_path(r'^view_goods/(?P<good_id>[0-9]+)/$', views.view_goods), re_path(r'^view_chart/$', views.view_chart), re_path(r'^remove_chart_all/$', views.remove_chart_all), re_path(r'^remove_chart/(?P<good_id>[0-9]+)/$', views.remove_chart), re_path(r'^add_chart/(?P<good_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.add_chart), re_path(r'^update_chart/(?P<good_id>[0-9]+)/$', views.update_chart), re_path(r'^view_address/$', views.view_address), re_path(r'^add_address/(?P<sign>[0-9]+)/$', views.add_address), re_path(r'^delete_address/(?P<address_id>[0-9]+)/(?P<sign>[0-9]+)/$',views.delete_address), re_path(r'^update_address/(?P<address_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.update_address), re_path(r'^delete_orders/(?P<orders_id>[0-9]+)/(?P<sign>[0-9]+)/$', views.delete_orders), re_path(r'^create_order/$', views.create_order), re_path(r'^view_order/(?P<orders_id>[0-9]+)/$', views.view_order), re_path(r'^view_all_order/$', views.view_all_order),]

细心的读者可能会发现，我这里没有定义静态变量，即以前代码中的。