django基础篇02-url路由系统

django的路由系统:

一、基本用法:

1.path('index', views.index),
# 通过类的方式创建url映射
2.path('home', views.Home.as_view()),
# 通过正则表达式的方式 注意这种方式不能通过path的方式关联,否则正则表达式无效,通过 from django.conf.urls import url,然后通过url(regx,views,kwargs,name)进行url的正则表达式的匹配
3.url(r'detail-(\d+)',views.detail),
4.url(r'detail-(\d+)-(\d+)',views.detail),
5.url(r'detail-(?P\d+)',views.detail)

实战:

1.通过url(r'detail-(\d+)-(\d+)',views.detail)

  urls.py

 

urlpatterns = [
    url(r'detail-(\d+)-(\d+)',views.detail),
   ]

  views.py

# 方式一:
def detail(request,nid,uid):
    pass

# 方式二:
def detail(request,*args,**kwargs):
    pass

以上方式,nid和uid关联的参数,适合调用参数有关系,比如调用'http://127.0.0.1:8080/detail-1-2',则 nid = 1, uid = 2;方式二的args = (1,2),kwargs = {}

可是这不是我们想要的,我们如何让nid和uid和传递的参数关联上,还是通过正则表达式解决参数关联问题

2.通过url(r'detail-(?P\d+)-(?P\d+)',views.detail)

  urls.py

urlpatterns = [
    url(r'detail-(?P\d+)-(?P\d+)',views.detail)
]

  views.py

# 方式一:
def detail(request,nid,uid):
    pass

def detail(request,uid,nid):
  pass # 方式二: def detail(request,
*args,**kwargs): pass

这样无论我们如何更换参数的位置,我们的获取的nid都是'/detail-1-2'的第一个参数值,uid始终为第二个参数值;而才是方式二的参数变为 args=() kwargs={'nid': 1,'uid':2}

 二、进阶

1.name(对URL路由关系进行命名,以后可以根据名称生成你想要的URL)

  urls.py

urlpatterns = [
    url('homemodule',views.home,name='m1'),
    url(r'disovermodule/(\d+)/(\d+)',views.discover,name='m2'),
    url(r'messagemodule/(?P\d+)/(?P\d+)',views.message,name='m3')    
]    

  views.py

def func(request,*args,**kwargs):
    from django.url import reverse
    
    url1 = reverse('m1')                          #/homemodule/
    url2 = reverse('m2',args=(1,2))             #/discovermodule/1/2
    url3 = reverse('m3',kwargs={'nid':3,'uid':4})    # /messagemodule/3/4

  xxx.html

{% url 'm1' %}                #/homemodule 
{% url 'm2' 1 2 %}          #/discovermodule/1/2
{% url 'm3' nid=3 uid=4 %} #/messagemodule/3/4

注意获取当前URL

request.path_info

 

转载于:https://www.cnblogs.com/it-q/p/9314849.html

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