Failed to assign values ​​to model attributes in Yii

Problem:

You cannot directly assign values ​​to model attributes in the Yii framework.

First take a look at the source code:

$menuId = isset($_GET['mId']) ? $_GET['mId'] : 0;
if ($menuId) {
    $menu = MenuTree::model()->findByPk($menuId);
    if(isset($_POST['MenuTree'])){
        var_dump($menu->attributes); //在这里跟踪输出的数据正常，跟表单中填写的一致
        $menu->attributes = $_POST['MenuTree']; //对attributes进行赋值
        var_dump($menu->attributes); //输出$menu模型中的attributes，不正常，结果并不是POST接收到的值，而是数据库原有的值
        if($menu->save()){
            Yii::app()->user->setFlash('success',"恭喜您，修改成功，请继续！");
            $this->redirect(Yii::app()->createUrl('menu/contentEdit',array('mId'=>$menuId)));
        }else{
            throw new CException("修改失败!");
        }
    }
    $this->render("contentEdit", array('menu' => $menu));
} else {
    throw new CHttpException('404');
}

(Related article tutorials recommended: yii framework)

This is the action code of a page, Looking at the comments in the code, you can see the error that occurred. The POST assignment is not accepted. I tried using the setAttributes function and it was also not accepted. The output is still the value of the original database, but it can be operated with updateByPk. After tracking the setAttributes function, I found that The function definition is as follows:

 
public function setAttributes($values,$safeOnly=true)
{
    if(!is_array($values))
        return;
    $attributes=array_flip($safeOnly ? $this->getSafeAttributeNames() : $this->attributeNames());
    foreach($values as $name=>$value)
    {
        if(isset($attributes[$name]))
            $this->$name=$value;
        else if($safeOnly)
            $this->onUnsafeAttribute($name,$value);
    }
}

Analyzing the setAttributes function code, we can see that security checks are performed when assigning values ​​to attributes, so I think the reason may be that the rules of the model are not set to be safe for the fields modified in those forms. After finding the reason, the solution comes out. In the rules of the model, just set the attribute of the field you want to modify to safe.

public function rules()
{
    // NOTE: you should only define rules for those attributes that
    // will receive user inputs.
    return array(
        // more code...
        array('field1 , field2 ,field3', 'safe'), //Modify the fields in here
        // more code...
    );
}

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