# django2.x版本的urls.py
from django.contrib import admin
from django.urls import path,re_path
from app01 import views
urlpatterns = [
    path('admin/', admin.site.urls),
    path('index',views.index),
    re_path('^index/\d+',views.index),
]

urlpatterns = [
    url(r'test',views.test),
    url(r'testadd',views.testadd),
]

# 127.0.0.1:8080/testadd 會(huì)直接和第一個(gè)路由匹配上，永遠(yuǎn)運(yùn)行不了下面testadd頁(yè)面

urlpatterns = [
    # 首頁(yè),正則表達(dá)式不能寫(xiě)空，否則會(huì)匹配所有的url后綴，而導(dǎo)致后面的頁(yè)面無(wú)法訪問(wèn)
    url(r'^$',views.home),
 # ^是指匹配的字符必須以什么開(kāi)始 $是指匹配的字符必須以什么結(jié)尾
    url(r'^test/$',views.test),
    url(r'testadd/',views.testadd),
]

# urls.py
urlpatterns = [
    url(r'test/(\d+)', views.test),   # \d+表示匹配數(shù)字
]

# views.py
def test(request, xx):  #  形參xx可以是任意的
    print(xx)
    return HttpResponse('test')

# urls.py
urlpatterns = [
    url(r'test/(?Pid>\d+)',views.test),   # \d+表示匹配數(shù)字, id就是分組的正則表達(dá)式的名字
]

# views.py
def test(request, id):  # 使用有名分組時(shí)，視圖函數(shù)的形參名字必須與有名分組的名字一致
    print(id)
    return HttpResponse('xx')

url(r'test/(\d+)/(\d+)/(\d+)',views.test)
url(r'test/(?Pid1>\d+)/(?Pid2>\d+)/(?Pid3>\d+)', views.test)

urlpatterns = [
    re_path('index/', views.index, name='index'),
    re_path('test/', views.test, name='test') # 路由與視圖函數(shù)的對(duì)應(yīng)關(guān)系別名name為test, 可以是任意的，但是必須唯一
] 

# views.py - 在后端視圖函數(shù)中反向解析，需要借助模塊實(shí)現(xiàn)動(dòng)態(tài)解析
from django.shortcuts import render, redirect, HttpResponse, reverse


# Create your views here.
def index(request):
    return HttpResponse('index')


def test(request):
    return redirect(reverse('index'))

# views.py
from django.shortcuts import render, redirect, HttpResponse


# Create your views here.
def index(request):
    return HttpResponse('index')


def test(request):
    return render(request, 'render_html.html')

!DOCTYPE html>
html lang="en">
head>
    meta charset="UTF-8">
    title>Title/title>
/head>
body>
a href={% url 'index' %}>click me/a>  !--通過(guò){% url '別名' %}的語(yǔ)法格式對(duì)后端的別名進(jìn)行解析，點(diǎn)擊即可跳轉(zhuǎn)到index/路由-->
/body>
/html>

# urls.py
urlpatterns = [
    re_path('index/(\d+)', views.index, name='index'),
    re_path('test/', views.test, name='test')
]

-----------------------------------------無(wú)名分組后端反向解析-------------------------------
# views.py  - 后端的反向解析
def index(request, x):
    return HttpResponse('index')

def test(request):
    # 參數(shù)必須是以元組的形式，并且參數(shù)必須能夠和正則表達(dá)式中的分組部分匹配，否則會(huì)報(bào)錯(cuò)，Reverse for 'func' with no arguments not found. 1 pattern(s) tried: ['index/(\\d+)']
    return redirect(reverse(viewname='index', args=(1,))) 


-----------------------------------------無(wú)名分組前端反向解析--------------------------------
# views.py
def index(request, x):
    return HttpResponse('index')

def test(request):
    return render(request, 'render_html.html')

# render_html.html
body>
a href={% url 'index' 1 %}>click me/a>   # {% url 別名 分組匹配的參數(shù) %}
/body>

# urls.py
urlpatterns = [
    re_path('index/(?Pid>\d+)', views.index, name='index'),
    re_path('test/', views.test, name='test')
]

----------------------------------------有名分組反向解析 - 后端反向解析-----------------------
# views.py
def index(request, id):
    return HttpResponse('index')

def test(request):
    # 匹配有名分組的參數(shù)是字典的格式字典的key就是有名分組的名字
    return redirect(reverse(viewname='index', kwargs={'id': 2}))

--------------------------------------有名分組反向解析 - 前端反向解析-------------------------
# views.py
def index(request, id):
    return HttpResponse('index')

def test(request):
    return render(request, 'render_html.html')

# render_html.html
body>
a href={% url 'index' id=2 %}>click me/a>  # {% url 別名 有名分組名字=分組匹配的參數(shù)%} 
/body>

----------------------------子路由文件---------------------------------------------------
# first應(yīng)用下的urls.py - first_django/first/urls.py
from django.conf.urls import url
from first import views

urlpatterns = [
    url(r'^index/', views.index),
    url(r'^test/', views.test),
]

# second應(yīng)用下的urls.py - first_django/second/urls.py
from django.conf.urls import url
from second import views

urlpatterns = [
    url(r'^index/', views.index),
    url(r'^test/', views.test),
]

-----------------------------------------總路由文件--------------------------------------
# first_django/first_django/urls.py
from django.conf.urls import url,include
from django.contrib import admin
from firstp import urls as first_url
from second import urls as second_url

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^first/',include(first_url)),
    url(r'^second/',include(second_url))
]

-----------------------------------------總路由文件--------------------------------------
# first_django/first_django/urls.py
from django.conf.urls import url,include
from django.contrib import admin
# from firstp import urls as first_url
# from second import urls as second_url

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^first/',include('first.urls')),
    url(r'^second/',include('first.urls'))
]