'Writes repair order state to \'Under Repair\'
@return: True'

@api.multi
def action_repair_start(self):

    if self.filtered((lambda repair: (repair.state not in ['confirmed', 'ready']))):
        raise UserError(_('Repair    must    be    confirmed    before    starting    reparation.'))
    self.mapped('operations').write({'state': 'confirmed'})
    return self.write({'state': 'under_repair'})
