Someone created a ticket to raise this issue again. I found several 
improper usages with GitHub code search. Is there any support for the idea 
or would it be too much magic? My own opinion is that if you don't have 
tests to catch the mistake in the first place, you're doing it wrong.

https://code.djangoproject.com/ticket/25847

On Thursday, April 10, 2008 at 1:06:37 PM UTC-4, David Cramer wrote:
>
> I wouldn't say insecure, but its a big gotcha. I've done it a quite a 
> few times where I forgot the () :) 
>
> On Apr 10, 5:53 am, Thomas Guettler <h...@tbz-pariv.de> wrote: 
> > Hi, 
> > 
> > is_staff, is_active, is_superuser are attributes. 
> > 
> > is_anonymous, is_authenticated are methods. 
> > 
> > This is insecure if you are not careful while programming: 
> > 
> > if user.is_authenticated: 
> >     ....# Always true, since it is a method! 
> > 
> > It would be nice to find a solution. Here is what I thought: 
> > 
> > Make is_authenticated a property which returns a object 
> > which evaluates to the proper boolean value. This object 
> > has a method __call__ which returns the same value. 
> > 
> > This is backwards compatible. 
> > 
> >  Thomas 
> > 
> > -- 
> > Thomas Guettler,http://www.thomas-guettler.de/ 
> > E-Mail: guettli (*) thomas-guettler + de

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