public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(array('eye_id, left_eyedraw, left_pupil_id, left_nuclear_id, left_cortical_id, left_pxe, left_phako, left_description,
right_eyedraw, right_pupil_id, right_nuclear_id, right_cortical_id, right_pxe, right_phako, right_description', 'safe'), array('left_eyedraw, left_description', 'requiredIfSide', 'side' => 'left'), array('right_eyedraw, right_description', 'requiredIfSide', 'side' => 'right'), array('id, event_id, left_eyedraw, left_pupil_id, left_nuclear_id, left_cortical_id, left_pxe, left_phako, left_description,
right_eyedraw, right_pupil_id, right_nuclear_id, right_cortical_id, right_pxe, right_phako, right_description', 'safe', 'on' => 'search'));
}