[Zope] Is there a way to have users add themselves to a role?

[Dieter Maurer]

Russell Hires wrote at 2003-4-3 23:22 -0500:
 > ...
 > I'm playing with plone, but this is really a zope question. At the moment, I 
 > want to give my users the ability to choose whether or not they receive an 
 > email when a certain object type is published. The way I'm looking at doing 
 > this is to allow the user to choose whether they have a certain role or not. 

That's quite an indirect approach. Roles have not been designed for this
use case.

In my view, it would be more natural to have a user attribute
or a relation "subscribed", holding subscription information for
all users and email services.

 > Naturally, these would be custom roles, but I want the user to decide 
 > (without my intervention) on if that person wants to have that role. 

It is difficult:

  The "AccessControl.User.BasicUser" API does not provide for
  a method to modify roles alone, only a method to change
  the user definition as a whole, including password.

  You can implement it (in an External Method) for non-encrypted passwords
  or for a given UserFolder (by using internal implementation specific
  knowledge).

Go a different way...


Dieter