[Seaside] Magriite question?

[John Chludzinski]

I'm trying to use Magritte for a "buddy list" app.  I've defined Buddy using
Magritte (i.e., using description* class-side methods).  One of the buddy
attributes is userName.  When I bring up an editor for a buddy (using
#addValidatedForm) I would like to be able to select a userName (from those
in the system) and have the remaining attributes filled in automatically.
 But each attribute is uniquely associated with a description* method and
there doesn't appear to be a way to define an action (associated with
selecting a userName) that would allow me to define the other buddy
attribute and have them appear in the editor.

---John

descriptionUserName

    ^ MASingleOptionDescription new
        options: ((MMADatabase users collect: [ :each | each userName ])
asArray);
        selectorAccessor: #userName;
        label: 'User Name';
        priority: 1;
        default: 'N/A';
        undefined: 'N/A';
        yourself
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