Yii 无法回显位于扩展/引导/小部件中的文件中的数据

我使用的是Yii 1.1。我在widgets文件夹中有一个名为MyCommentsTbEditableSaver的类文件。 当我尝试回显php文件中的数据时，它不会返回任何东西。 这背后的原因是什么？ 我的代码：`

public function insertRps()
{
    //get params from request
    $this->primaryKey = yii::app()->request->getParam('pk');
    $this->attribute = yii::app()->request->getParam('name');
    //$this->attribute = yii::app()->request->getParam('comments');
    $this->value = yii::app()->request->getParam('value');

    //checking params
    if (empty($this->attribute)) {
        throw new CException(Yii::t('MyCommentsTbEditableSaver.editable', 'Property "attribute" should be defined.'));
    }
    if (empty($this->primaryKey)) {
        throw new CException(Yii::t('MyCommentsTbEditableSaver.editable', 'Property "primaryKey" should be defined.'));
    }


    $model=new ProjectComments();


    $comments=Yii::app()->db->createCommand()
            ->select('count(project_id) as countProject')
            ->from('pm_project_comments')
            ->where("project_id = $this->primaryKey ")
            ->queryRow();

    if($comments['countProject']==0)
    {
        $model->isNewRecord=TRUE;
        $model->comments_rps=$this->value;
        $model->project_id=$this->primaryKey;

        //also set update details,added by bishal
        $model->crtd_by=Yii::app()->user->id;
        $model->crtd_dt = date('Y-m-d');
        print_r($model);die;
        $model->save();
    }

}`

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此处print（$model）不返回任何值。您确定这部分代码已执行吗？是的，我也在调试模式下运行此代码。但未返回任何结果。