Thanks a lot Bruno!
That really helped :)
On Nov 17, 3:20 am, bruno desthuilliers
<[EMAIL PROTECTED]> wrote:
> On 17 nov, 10:02, TH <[EMAIL PROTECTED]> wrote:
>
>
>
> > Hello,
>
> > I wanted to redirect a logged in user if he access certain page. For
> > example i do not want the user to access registration page if he is
> > logged in.
>
> > A simple way to do this is:
>
> > def register(request):
> > if request.user.is_authenticated():
> > return HttpResponseRedirect('/
> > some_nice_page_for_logged_in_user')
> > ...
>
> > The problem is i have lot of pages that only anonymous user can
> > access. So i wanted to write a decorator so that i can do something
> > like that
>
> > @anonymous_only
> > def register(request):
>
> A "decorator" is just a function (or any other callable) that takes a
> function as argument and returns a function (or any other callable).
> The @decorator syntax is only syntactic sugar.
>
> In most cases, the returned function is just a wrapper around the
> decorated one, and this is obviously what you want:
>
> def anonymous_only(view):
> # 'view' is the view function to decorate
> # since we decorate views, we know the first parameter
> # is always going to be the current request
> #
> # '_wrapper' is the function that will be used instead
> # of 'view'.
> def _wrapper(request, *args, **kw):
> # here we can access the request object and
> # either redirect or call 'view'
> if request.user.is_authenticated():
> return HttpResponseRedirect('/page_for_logged_in_user')
> return view(request, *args, **kw)
>
> # this part is not mandatory, but it may help debugging
> _wrapper.__name__ = view.__name___
> _wrapper.__doc__ = view.__doc__
>
> # and of course we need to return our _wrapper so
> # it replaces 'view'
> return _wrapper
>
> Note that this example assume you always want to redirect to the same
> page if the user is logged in, which might not be the case. Things get
> a bit more complicated if you want your decorator to takes the
> redirection url as param, since we'll then need one more indirection,
> IOW : a function that takes an url and returns a function that takes a
> function and returns a 'wrapper':
>
> def anonymous_only(redirect_to):
> def deco(view):
> def _wrapper(request, *args, **kw):
> if request.user.is_authenticated():
> return HttpResponseRedirect(redirect_to)
> return view(request, *args, **kw)
>
> _wrapper.__name__ = view.__name___
> _wrapper.__doc__ = view.__doc__
> return _wrapper
>
> return deco
>
> Then you use it that way:
>
> @anonymous_only('/page_for_logged_in_user')
> def register(request):
> # code here
>
> HTH
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