cakephp:当模型的beforeSave方法返回false时，在控制器中显示错误消息？

我的学生模型中有一个beforeSave方法，它返回true或false。 我希望在beforeSave mtd of Student model返回false时显示不同的错误消息，而不是在StudentsController中显示所有保存错误的标准消息（无法保存您的录取。请重试）。我该怎么做

学生控制员

function add(){
if ($this->Student->saveAll($this->data)){
$this->Session->setFlash('Your child\'s admission has been received. We will send you an email shortly.');
 }else{
$this->Session->setFlash(__('Your admission could not be saved. Please, try again.', true));  
   }
}

---

我建议实施验证规则，然后调用：

if ($this->Model->validates() ) { 
  save 
} else { 
  error message / redirect 
}

---

阅读CakePHP中的数据验证，Deceze和Chapman是正确的。我从cakephp食谱的数据验证章节中找到了解决方案。谢谢大家

以下是我添加的验证规则：

对于学生模型中的学生姓名：

var $validate=array(
        'name'=>array(
                'nameRule1'=>array(
                    'rule'=>array('minLength',3),
                    'required'=>true,
                    'allowEmpty'=>false,
                    'message'=>'Name is required!'
                    ),
                'nameRule2'=>array(
                       'rule'=>'isUnique',
                       'message'=>'Student name with the same parent name already exist!'
                     )
                ),

然后在StudentsController的add函数中：

//checking to see if parent already exist in merry_parents table when siblings or twin are admitted.
            $merry_parent_id=$this->Student->MerryParent->getMerryParentId($this->data['MerryParent']['email']);
            if (isset($merry_parent_id)){
                $this->data['Student']['merry_parent_id']=intval($merry_parent_id);
                var_dump($this->data['Student']['merry_parent_id']);
                if ($this->Student->save($this->data)){  
                //data is saved only to Students table and not merry_parents table.
                    $this->Session->setFlash(__('Your child\'s admission has been received. 
                                        We will send you an email shortly.',true));
                }else
                        $this->Session->setFlash(__('Your admission could not be saved. Please, try again.',true));
            }else{//New record. So, data is saved to Students table and merry_parents table.
                      if ($this->Student->saveAll($this->data)){ //save to students table and merry_parents table
                         $this->Session->setFlash(__('Your child\'s admission has been received. 
                                                          We will send you an email shortly.',true));
                      }else 
                          $this->Session->setFlash(__('Your admission could not be saved. Please, try again.', true));
                 }//new record end if

我不需要像查普曼所说的那样在不保存的情况下验证数据。所以，我没有使用：

if ($this->Model->validates() ) {         
  save         
} else {         
  error message / redirect         
}       

---

为什么

beforeSave

返回

false

？beforeSave返回false以避免在db表中插入重复记录。然后，您应该能够通过自动错误消息而不是

beforeFilter

操作将其作为常规验证规则来实现。这将产生常规的、良好的错误消息。好的，我将检查数据验证并让您知道。好的，我将阅读数据验证并返回给您。谢谢