urls.py路由系统分发的本质

时间：2021-06-15 08:08:11

路由系统分发的本质

反向生成redirect跳转url

1.在urls.py中指定url的name

from django.conf.urls import url

from django.contrib import admin

from app01 import views

urlpatterns = [

    url(r'^index/', views.index, name="INDEX"),

    url(r'^login/', views.login),

]

2.在views视图函数中使用reverse指定 INDEX地址

from django.shortcuts import render, HttpResponse, redirect

from django.shortcuts import reverse

def index(request):

    return HttpResponse("hello")

def login(request):

    # 通过reverse("INDEX") 指向 "INDEX" 别名

    return redirect(reverse("INDEX"))

应用url的分发include

1.将包含cmdb应用的url请求，转发给cmdb引用中的urls.py中

from django.conf.urls import url, include

from django.contrib import admin

from app01 import views

urlpatterns = [

    # 127.0.0.1:8000/cmdb/xxxx/   cmdb的url 转到cmdb 应用下的urls中

    url(r'^cmdb/', include("cmdb.urls")),

]

2.在指定APP的项目中，创建一个 urls.py文件

from django.conf.urls import url

from cmdb import views

urlpatterns = [

    # 跳转到该应用中的 views 视图函数中

    url(r'^hosts/$', views.hosts),

]

反向生成URL地址,指定namespace

1.将指定app的url跳转，加上namespace="o"，指定跳转到哪个应用app

from django.conf.urls import url, include

from django.contrib import admin

from app01 import views

urlpatterns = [

    # url(r'^admin/', admin.site.urls),

    url(r'^index/', views.index, name="INDEX"),

    url(r'^login/', views.login),

    url(r'^cmdb/', include("cmdb.urls", namespace="c")),

    url(r'^openstack/', include("openstack.urls", namespace="o")),

]

2.在views的视图函数中，使用redirect跳转路径时需要加上前缀"o:hosts"

from django.shortcuts import render, HttpResponse, redirect

from django.shortcuts import reverse

def index(request):

    return HttpResponse("hello")

def login(request):

    # 登录成功后，跳转到 openstack 应用的 主机列表页面

    return redirect(reverse("o:hosts"))

通过 循环的形式 添加URL地址

from django.conf.urls import url

from app01 import views

urlpatterns = [

    # url(r'^admin/', admin.site.urls),

    # url(r'^index/', views.index, name="INDEX"),

    url(r'^login/', views.login),

]

# 通过for 循环将，生成的url 添加到 urlpatterns 中

for i in range(10):

    temp = []

    for j in range(5):

        temp.append(url(r'^inner_%s/' % j, views.login))

    v = url(r'^login_%s/' % i, (temp, None, None))

    urlpatterns.append(v)

输出,生成的url列表：

^login/

^login_0/ ^inner_0/

^login_0/ ^inner_1/

^login_0/ ^inner_2/

^login_0/ ^inner_3/

^login_0/ ^inner_4/

^login_1/

^login_2/

^login_3/

^login_4/

^login_5/

^login_6/

^login_7/

^login_8/

^login_9/

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