2019.03.23 路由扩展

在路由配置中 里边都是正则来表示

净弄花里胡哨的东西  会两种就好了  就是配置访问的路径和参数吧

Django如何处理一个请求

当一个用户通过网页发送一个请求给Django网站,Django执行过程如下:

  1. 首先访问项目下的settings.py文件中 ROOT_URLCONF = 'test1.urls'

  2. 执行项目包下的urls.py文件中的urlpatterns列表

  3. 执行应用包下的urls.py文件中的urlpatterns列表

  4. 根据匹配的url正则调用相应的视图函数/通用视图

  5. 如果没有匹配的正则,将会自动调用Django错误处理页面

url函数配置方式

  • 方式1

#student/urls.py

#coding=utf-8

from django.conf.urls import url
from . import views

urlpatterns=[
  url(r'^query$',views.queryAll)

]

#student/views.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.http import HttpResponse
from django.shortcuts import render

# Create your views here.

def queryAll(request):

  return HttpResponse('hello world')
   
   
   

#访问地址
http://127.0.0.1:8000/student/query

  • 方式2:位置传参

#student/urls.py

#coding=utf-8

from django.conf.urls import url
from . import views

urlpatterns=[
   
  url(r'^query/(d{2})$',views.queryAll),

]


#student/views.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.http import HttpResponse
from django.shortcuts import render

# Create your views here.

def queryAll(request,sno):
  print sno
  return HttpResponse('hello world')


#访问地址
http://127.0.0.1:8000/student/query/12
  • 方式3:关键字传参


urlpatterns=[
 
  url(r'^query/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})/(?P<day>[0-9]{2})/$', views.queryAll),

]


def queryAll(request,year,day,month):
  print year,month,day
  return HttpResponse('hello world')
   
   
#访问地址
http://127.0.0.1:8000/student/query/2008/10/12/  

  • 方式4:加载其他映射文件


from django.conf.urls import include, url

urlpatterns = [
   
  url(r'^community/', include('aggregator.urls')),

]
  • 方式5:传参(参数名必须保持一致)


urlpatterns=[
   
  url(r'^query/(?P<num1>d{3})/$',views.queryAll,{'hello':'123'}),
]



def queryAll(request,num1,hello):
  print num1,hello
  return HttpResponse('hello world')
   
#访问地址  
http://127.0.0.1:8000/student/query/888/

逆向解析(防止硬编码)

#student/urls.py

from django.conf.urls import url
from . import views

urlpatterns=[
  url(r'^query1/([0-9]{4})/$', views.queryAll, name='hello'),
  url(r'^$', views.index_view),
]

#student/views.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.http import HttpResponse
from django.shortcuts import render

# Create your views here.

def queryAll(request,num1):
  print num1
  return HttpResponse('hello world')

#通过模板页面逆向访问
def index_view(request):
  return render(request,'index.html')

#通过Python代码逆向访问
def index_view(request):
  # return render(request,'index.html')
  return HttpResponseRedirect(reverse('hello',args=(2018,)))
   
   
   

#templates/index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
  <a href="{% url 'hello' 2008 %}">访问</a>

</body>
</html>



  • 方式2



#项目包/urls.py

from django.conf.urls import url, include
from django.contrib import admin

urlpatterns = [
  url(r'^admin/', admin.site.urls),
  url(r'^student/', include('student.urls',namespace='stu',app_name='student')),
]

#应用包/urls.py

#coding=utf-8

from django.conf.urls import url
from . import views

urlpatterns=[

  url(r'^$', views.Index.as_view()),
  url(r'^query2/',views.Login.as_view(),name='login')
]


#应用包/views.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse




from django.views import View
class Index(View):
  def get(self,request):
      return render(request,'index.html')


class Login(View):
  def get(self,request):
      return HttpResponse('hello')


#templates/index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
  <a href="{% url 'stu:login' %}">访问</a>

</body>
</html>

原文地址:https://www.cnblogs.com/Py-king/p/10583073.html