public function search()
{
// Warning: Please modify the following code to remove attributes that
// should not be searched.
$criteria = new CDbCriteria();
$criteria->compare('customer_group_id', $this->customer_group_id);
$criteria->compare('approval', $this->approval);
$criteria->compare('company_id_display', $this->company_id_display);
$criteria->compare('company_id_required', $this->company_id_required);
$criteria->compare('tax_id_display', $this->tax_id_display);
$criteria->compare('tax_id_required', $this->tax_id_required);
$criteria->compare('sort_order', $this->sort_order);
return new CActiveDataProvider($this, array('criteria' => $criteria));
}