Yii2 rules 自定义验证规则

    public function rules() {
        return[
            [['groupname','bandwidth'],'required'],//不为空验证
            [['id','bandwidth'], 'integer'],//整数验证
            [['note'], 'safe' ],//安全验证
            [['groupname'], 'unique'],//唯一验证
            [['groupname'], 'string', 'length' => [1, 64]],//字符串验证
            [['groupname'], 'GroupNameVerification'],//自义定验证
        ];
    }

    public function attributeLabels() {
        return [
            'id'        => 'id',
            'groupname' => Yii::t('app', 'speedlimitgroupname'),
            'bandwidth' => Yii::t('app', 'speedlimitbandwidth'),
            'note'      => Yii::t('app', 'note'),
        ];
    }


     /**
     * 自义定验证
     */
    public function GroupNameVerification($attribute){
        if(!preg_match("/^(([a-z]+[0-9]+)|([0-9]+[a-z]+))[a-z0-9]*$/i",$this->groupname)){
            return $this->addError($attribute, Yii::t('app', 'canonlycontainlettersandnumbers'));
        }
    }