python 视图

概述：

视图(view)是Django应用中的一类网页, 它通常使用一个特定的函数提供服务,并且具有一个特定的模板。

写更多视图
现在让我们给polls/views.py添加一些更多的视图。 这些视图和之前的略有不同，因为它们另带了一个参数：



polls/views.py
def detail(request, question_id):
    return HttpResponse("You're looking at question %s." % question_id)

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    return HttpResponse("You're voting on question %s." % question_id)
	
	
通过下面的url() 调用将这些新的视图和polls.urls模块关联起来：


from . import views

urlpatterns = [
    # ex: /polls/
    url(r'^$', views.index, name='index'),
    
	# ex: /polls/5/
    url(r'^(?P<question_id>[0-9]+)/$', views.detail, name='detail'),
    
	# ex: /polls/5/results/
    url(r'^(?P<question_id>[0-9]+)/results/$', views.results, name='results'),
	
    # ex: /polls/5/vote/
    url(r'^(?P<question_id>[0-9]+)/vote/$', views.vote, name='vote'),
]

看看你的浏览器,输入"/34/"它将运行detail()方法并显示你在URL中提供的ID。

当有人从你的网站请求一个页面 --例如 "/polls/34/"时,Django 将加载mysites.urls Python模块 

在'^polls/' 找到匹配后,它将取消匹配的文件("polls/"),并发送剩余的文本 - "34/" 到polls.urls's URLconf进行进一步处理。

它匹配'^(?P<question_id>[0-9]+)/$',导致调用detail()视图  


http://192.168.137.2:9000/polls/34/


polls/views.py
def detail(request, question_id):
    return HttpResponse("You're looking at question %s." % question_id)

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


    
# ex: /polls/5/
url(r'^(?P<question_id>[0-9]+)/$', views.detail, name='detail'),