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View Redirect Decorators

Author:
bryanpieper
Posted:
July 11, 2010
Language:
Python
Version:
1.2
Score:
-2 (after 2 ratings)

Temporary and permanent view redirect decorators. Simplifies views that always redirect to a specific or configured url. You can use the reverse() function (or any other runtime-required lookup) via lambda to define the redirect url. 

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from functools import wraps
from django.http import HttpResponsePermanentRedirect, HttpResponseRedirect

def permanent_redirect(url):
    """
    Executes a HTTP 301 (permanent) redirect after the view finishes processing. If a
    value is returned, it is ignored. Allows for the view url to be callable so the
    reverse() lookup can be used.

    @permanent_redirect('/another-url/')
    def redirect_view(request):
        ...

    @redirect(lambda: reverse('some_viewname'))
    def do_redirect(request):
        ...

    """
    def outer(f):
        @wraps(f)
        def inner(request, *args, **kwargs):
            f(request, *args, **kwargs)
            return HttpResponsePermanentRedirect(url if not callable(url) else url())
        return inner
    return outer


def redirect(url):
    """
    Executes a HTTP 302 redirect after the view finishes processing. If a value is 
    returned, it is ignored. Allows for the view url to be callable so the
    reverse() lookup can be used.
    
    @redirect('http://www.google.com/')
    def goto_google(request):
        pass

    @redirect(lambda: reverse('some_viewname'))
    def do_redirect(request):
        ...
    
    """
    def outer(f):
        @wraps(f)
        def inner(request, *args, **kwargs):
            f(request, *args, **kwargs)
            return HttpResponseRedirect(url if not callable(url) else url())
        return inner
    return outer

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Comments

zymen (on July 13, 2010):

Why dont you use django.views.generic.simple.redirect_to view?

#

bryanpieper (on July 13, 2010):

These decorators are supplemental to the generic django views. They allow you to process any number of items before the redirection.

#

zymen (on July 14, 2010):

Yes, but what is a difference between:

def view1(request): do_actions redirect_to(...)

and

@redirect(...) def view2(request): do_actions

I don't know what others think about it, but for me this snippet doesn't contain 'value added'.

#

Verurteilt (on July 19, 2013):

@zymen This can be veru helpful when you return a pdf output and you need to redirect after the return pdf

#

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