/*******************
Title:yii Trying to get property of non-object错误Author:insun
Blog:http://yxmhero1989.blog.163.com
****************/   

yiic 去执行时候因为调用另外一个model 所以可能会出现Trying to get property of non-object

所以在要在调用model之前判断这个model是否存在


 

 这样的代码，就会出现上面的错误。

public function getCityName($id)
    {
        $model = City::model()->findByPk($id);
            return $model->name;
    }

一定要做个判断，正确的如下：

    public function getCityName($id)
    {
        $model = City::model()->findByPk($id);
        
        if($model){
            return $model->name;
        }
        else{
            return null;
        }
    }


 


譬如： 


/**
  
   

    * Returns the data model based on the primary key given in the GET variable.
  
   

    * If the data model is not found, an HTTP exception will be raised.
  
   

    * @param integer the ID of the model to be loaded
  
   

    */
  
   

   public function loadModel($id)
  
   

   {
  
   

   $model=Member::model()->findByPk($id);
  
   

   if($model===null)
  
   

   throw new CHttpException(404,'抱歉，你请求的页面不存在.');
  
   

   return $model;
  
   

   }