Django - Filtering with default

Question

I have a method visible on a QuerySet class which should return all articles an user can see. If the user is not logged in, all articles with min_age should'nt be visible, otherwise, if the user is logged in, all articles which min_age is lower than the user's age should be visible. I wrote this code but I think it can be improved. These raise AttributeError aren't good practice, I know, but how can I improve it?

 def visible(self, request=None):
 articles = self.filter(hidden=False)
 try:
 if request is not None:
 if request.user.is_authenticated:
 if request.user.userprofile.has_filled_out:
 articles = articles.filter(min_age__lte=request.user.userprofile.age)
 else:
 raise AttributeError
 else:
 raise AttributeError
 else:
 raise AttributeError
 except AttributeError:
 articles = articles.filter(min_age=None)
 return articles

Answer 1

Just put all those conditions into single IF using AND/OR. return limited queryset in ELSE branch.

• Myzel394: Omg I am so dumb. I don't know why I didn't think that way! Thank you very much!
• K.H.: Thats how we learn, cheers ;)