Django URL Design Trivia Point

mysite/news/urls.py:

 from  django.conf.urls import   URL  from . import   Viewsurlpatterns  = [URL (r   '  

The above code maps the URLs map to a Python callback function (view) as a simple regular expression. the regular expression "captures" the value in the URLs by means of parentheses.  When a user requests a page, Django will match each pattern in order and stop at the URL of the first matching request. (if there is no match, Django calls a special 404 view.) the entire process is extremely fast because the regular expression is compiled at load time.

once a regular expression is matched, Django will import and invoke the corresponding view, which is actually a simple Python function. Each view will have a request object-it contains the meta-information of the request-and the value captured by the regular expression.

For example, if a user requests the URL "/articles/2005/05/39323/", Django will call the function News.views.article_detail (Request, ' 2005 ',' ', ' 39323 ').

In news.views.py:

def article_detail (request,year, month, number):

......

Call "/articles/2005/05/39323/?day=monday", and the argument is worth the corresponding relationship:

Request. get[' Day '] = = ' Monday '

Year = = 2005

month = = 05

Number = = 39323

Django URL Design Trivia Point