Django之URL的命名空间和命名模式

Django之URL的命名空间和命名模式

http://blog.csdn.net/xiaobing_blog/article/details/11003643

 

django URL模式浅析

http://blog.csdn.net/laughing2333/article/details/51674905

Namespacing URL names¶

The tutorial project has just one app, polls. In real Django projects, there might be five, ten, twenty apps or more. How does Django differentiate the URL names between them? For example, the polls app has a detail view, and so might an app on the same project that is for a blog. How does one make it so that Django knows which app view to create for a url when using the {% url %} template tag?

The answer is to add namespaces to your URLconf. In the polls/urls.py file, go ahead and add an app_name to set the application namespace:

polls/urls.py

from django.conf.urls import urlfrom . import viewsapp_name = 'polls'urlpatterns = [    url(r'^$', views.index, name='index'),    url(r'^(?P<question_id>[0-9]+)/$', views.detail, name='detail'),    url(r'^(?P<question_id>[0-9]+)/results/$', views.results, name='results'),    url(r'^(?P<question_id>[0-9]+)/vote/$', views.vote, name='vote'),]

Now change your polls/index.html template from:

polls/templates/polls/index.html

<li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>

to point at the namespaced detail view:

polls/templates/polls/index.html

<li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>

xys友情提醒：
URL命名空间是用于模板文件中对URL（所谓URL是浏览器访问时的网络地址）的反向引用，一般会使用模板标签{% url %}
例如在index.html中
{% url 'polls:detail' question.id %}"
这根模板文件的命名空间（其实质是本地的相对路径）不一样：模板文件的命名空间的应用场景是，在每个APP下建立appname/templates/appname/，然后在该目录下再放模板文件(index.html)。然后在需要引用模板文件的地方，采用模板文件相对地址硬编码时，形式如下：appname/index.html.
例如在views.py中
def index(request):    #return HttpResponse("Hello, world. You're at the polls index.")    return render(request,'polls/index.html')
或者index.html中
 <li><a href="/polls/xxx.html">{{ question.question_text }}</a></li>