[['rId','advertiser_id','image_file'], 'unique','targetAttribute'=>['rId','advertiser_id','image_file'],'message'=>'重复插入数据'],//设置多个字段唯一

public static function getTableSchema()  //设置字段的可变属性

{

        $schema = parent::getTableSchema();

        $schema->columns['age']->phpType = 'string';

        return $schema;

}

 public function behaviors()

    {

        return !empty($this->getDirtyAttributes())?[ //设置脏字段时最后更新时间变动

            'timestamp' => [

                'class' => TimestampBehavior::className(),

                'attributes' => [

                    ActiveRecord::EVENT_BEFORE_INSERT => ['created_time', 'last_modified_time'],

                    ActiveRecord::EVENT_BEFORE_UPDATE => 'last_modified_time',

                ],

                'value' => function() { return date('Y-m-d H:i:s'); },

            ],

        ]:(parent::behaviors());

    }