ActiveRecord里的attributes属性不管怎么样都是null。。。 [ 2.0 版本 ]

求救啊，自己怎么设置$this->属性名，甚至是设置$this->attributes=$array,打印出来都是空。。。oldattributes也是，我也设置了属性为safe了，不管是load或是直接赋值，attribute就一直是空，甚至刚赋完值再一打印还是空。。原谅我语无伦次了，真气疯了。。。

object(app\modules\admin\models\Article)[44]
  public 'title' => string 'sdfs' (length=4)
  public 'author' => string 'dfsd' (length=4)
  public 'address' => string 'fgdf' (length=4)
  public 'pubtime' => int 1451264799
  public 'description' => string 'gdfgd' (length=5)
  public 'abstract' => string 'dfgdf' (length=5)
  public 'pic' => string '' (length=0)
  public 'content' => string '<p>sdgdfgdfgdf</p>' (length=18)
  public 'class' => string '2' (length=1)
  public 'readnum' => null
  public 'likes' => null
  private '_attributes' (yii\db\BaseActiveRecord) => 
    array (size=0)
      empty
  private '_oldAttributes' (yii\db\BaseActiveRecord) => null
  private '_related' (yii\db\BaseActiveRecord) => 
    array (size=0)
      empty
  private '_errors' (yii\base\Model) => null

求帮看一下，这里明明属性都是有值的，为什么attributes就一直为空呢？

['title','safe'] ,
                ['author','safe'] ,
                ['abstract','safe'] ,
                ['class','safe'] ,

分别设置safe

[['title','author','abstract','class','address','content','description','pic','id','pubtime','likes','readnum'],'safe'],

['title,author,abstract,class,address,content,description,pic,id,pubtime,likes,readnum','safe'],

一次设置全部safe，全都试过了，就是不行。。。。