突然间，yii怎么也无法获取到表单提交的数据 [ 新手入门 ]

具体什么情况????

视图：

<div class="pageFormContent nowrap" layoutH="10">
<?php 
$form=$this->beginWidget('CActiveForm', array(
    'id'=>'classroom-form',
    'enableAjaxValidation'=>false,
    'htmlOptions'=>array('onsubmit'=>'return validateCallback(this,dialogAjaxDone)','class'=>'pageForm required-validate'),
)); ?>

<p class="note">带<span class="required">*</span>号的字段是必填的.</p>

<?php echo $form->errorSummary($model); ?>

<dl>
    <dt><?php echo $form->labelEx($model,'title'); ?></dt>
    <dd><?php echo $form->textField($model,'title',array('size'=>8,'maxlength'=>8,'class'=>'required')); ?></dd>
    <dd><?php echo $form->error($model,'title'); ?></dd>
</dl>

<dl>
    <dt>  <?php echo $form->labelEx($model,'grade_id'); ?></dt>
    <dd><?php echo $form->textField($model,'grade_id',array('size'=>8,'maxlength'=>8,'class'=>'required')); ?></dd>
    <dd>  <?php echo $form->error($model,'grade_id'); ?></dd>
</dl>

<dl>
    <dt><?php echo CHtml::submitButton($model->isNewRecord ? '创建' : '保存'); ?></dt>
</dl>

<?php $this->endWidget(); ?>

</div><!-- form -->

模型：

<?php
/**
 * This is the model class for table "{{classroom}}".
 *
 * The followings are the available columns in table '{{classroom}}':
 * @property integer $id
 * @property string $title
 * @property string $grade_id
 */
class Classroom extends CActiveRecord
{
	/**
	 * Returns the static model of the specified AR class.
	 * @param string $className active record class name.
	 * @return Classroom the static model class
	 */
	public static function model($className=__CLASS__)
	{
		return parent::model($className);
	}

	/**
	 * @return string the associated database table name
	 */
	public function tableName()
	{
		return '{{classroom}}';
	}

	/**
	 * @return array validation rules for model attributes.
	 */
	public function rules()
	{
		// NOTE: you should only define rules for those attributes that
		// will receive user inputs.
		return array(
			//array('title, grade_id', 'required'),
			//array('title, grade_id', 'length', 'max'=>8),
			// The following rule is used by search().
			// Please remove those attributes that should not be searched.
			array('id, title, grade_id', 'safe', 'on'=>'search'),
		);
	}

	/**
	 * @return array relational rules.
	 */
	public function relations()
	{
		// NOTE: you may need to adjust the relation name and the related
		// class name for the relations automatically generated below.
		return array(
			'nianji' => array(self::BELONGS_TO, 'Grade', 'grade_id'),//班级属于年级
			'student' => array(self::HAS_MANY, 'Student', 'classroom_id', 'condition'=>'classrooms.id=students.classroom_id','order'=>'classrooms.id DESC'),
			'studentCount' => array(self::STAT, 'Student', 'classroom_id', 'condition'=>'classroom_id=classrooms.id'),
		);
	}

	/**
	 * @return array customized attribute labels (name=>label)
	 */
	public function attributeLabels()
	{
		return array(
			'id' => 'ID',
			'title' => 'Title',
			'grade_id' => 'Grade',
		);
	}

	/**
	 * Retrieves a list of models based on the current search/filter conditions.
	 * @return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
	 */
	public function search()
	{
		// Warning: Please modify the following code to remove attributes that
		// should not be searched.

		$criteria=new CDbCriteria;

		$criteria->compare('id',$this->id);
		$criteria->compare('title',$this->title,true);
		$criteria->compare('grade_id',$this->grade_id,true);

		return new CActiveDataProvider($this, array(
			'criteria'=>$criteria,
		));
	}
}

折腾了一个上午，搞不明白，为什么控制器里面无法获取表单数据

public function actionCreate()
{
    $model=new Classroom;

    // Uncomment the following line if AJAX validation is needed
    // $this->performAjaxValidation($model);

    if(isset($_POST['Classroom']))
    {
        $model->attributes=$_POST['Classroom'];
        if($model->save())
            $this->redirect(array('view','id'=>$model->id));
    }

    $this->render('create',array(
        'model'=>$model,
    ));
}

昨天晚上还正常，今天晚上起来就不正常了。太怪了。
实在不行，重新生成一次代码算了。

我也出现这问题了，我把 'onsubmit'=>'return validateCallback(this,dialogAjaxDone)' 注释掉后就能获取了，但是，onsubmit就不能用了，求怎么办？