[web2py] Re: Temporary changing default values of a Form

[Luis Goncalves]

Both with Massimo's

          auth.settings.table_user.email.default = registrant.email
          auth.settings.table_user.email.writable=False
           
          form=auth.register()

and with your 

          db[auth.settings.table_user_name].email.writable=False
          db[auth.settings.table_user_name].email.default=registrant.email
          
          form=auth.register()

I get the error

Exception: Target receiver address not specified

at the line of    form=auth.register()


For reference, the entire block (with error handling removed for clarity) 
is:

  def user():
          
      if request.args(0)=='register':
              
          registrant = db( db.registrant.token == request.vars.token 
).select().first()
  
          db[auth.settings.table_user_name].email.writable=False
          db[auth.settings.table_user_name].email.default=registrant.email
          
          form=auth.register()
          
          return dict(form=form)

return dict(form=auth())