I would charge an information automatically when i choose another, when I add this fonction to my class i got that error No handler found.

this is my code:

def onchange_medium(self, cr, uid, ids, division_id, context=None):

if division_id:

division = self.pool.get('standard.division').browse(cr, uid, division_id, context)

return {'value':{'medium_id':division.medium_id.id,}}

return {}