Many links to one function in url.py

[Jun Tanaka]

Hi there.

I hope to know the solution for the following:

say, there are several links to one function but I would like to identify which link that come from.

url.py looks

    (r'^link1/$', 'project.apps.main.get'),

    (r'^link2/$', 'project.apps.main.get'),

    (r'^link3/$', 'project.apps.main.get'),

    (r'^link4/$', 'project.apps.main.get'),

In 'get' function, how can I know which link does that come from? Later, I want to get a parameter , 1, 2, 3, 4 in that function. 

If anyone have a good idea? please teach me.

[Lucas Klassmann]

Hi Jun,

Try this:

Put only this line in urls.py

url(r'^link/(?P<identifier>\d+)/$', 'project.apps.main.get'),

And in your view, add identifier as argument in function:

def get(request, identifier):

    ...

    return HttpResponse(u'Identifier %d' % identifier)

Note that identifier is a int and you must use link as /link/1

Read more:

https://docs.djangoproject.com/en/dev/topics/http/urls/

Cheers.

--
Lucas Klassmann
Software Developer
Email: lucaskl...@gmail.com
Web site: http://www.lucasklassmann.com

[Jun Tanaka]

Hi Lucas,

Thank you very much. It seems that I can use this. Hopefully, I can ask you one more question. 

\d+ is for a int. 

is \w+ for a string?  

What does \w* mean? I saw it. 

Jun

2014年5月21日水曜日 11時49分46秒 UTC+9 Lucas Klassmann:

[Tom Evans]

You can add arguments to send to the view in the url:

https://docs.djangoproject.com/en/1.6/topics/http/urls/#passing-extra-options-to-view-functions

Eg:

urlpatterns = patterns('',
url(r'^link1/$', 'project.apps.main.get', { 'type': 'link1' }),
url(r'^link2/$', 'project.apps.main.get', { 'type': 'link2' }),
url(r'^link3/$', 'project.apps.main.get', { 'type': 'link3' }),
url(r'^link4/$', 'project.apps.main.get', { 'type': 'link4' }),
)

Make sure that you use the url() function rather than a raw tuple.

Cheers

Tom

[François Schiettecatte]

You can also do something like this:

(r'^link(?P<linkID>d+)/$', 'project.apps.main.get'),

project.apps.main.get will be passed a parameter called linkID containing the number, and if you wanted to limit it to digits 1 through 4, you would use:

(r'^link(?P<linkID>[1-4])/$', 'project.apps.main.get'),

Cheers

François

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[Lucas Klassmann]

Hi Jun,

The diference is:

With \w only one character is allowed and not allow null, like this: /link/a/

With \w+ one or more characters is allowed and not allow null, like this: /link/mypage/

With \w* zero or more is allowed and also null argument, like this: /link//   (Note the double slash, django will allow urls like this)

And \d+ is same that \w+, but for only numbers.

More information, you must read Regular Expression for python: https://docs.python.org/2/library/re.html

Cheers

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