yii表单提交Validate过程详解

在action函数中，调用model中的validate函数

$model=new LoginForm;

$model->attributes=$_POST['LoginForm'];

   if($model->validate() && $model->login())

    $this->redirect(Yii::app()->user->returnUrl);

CModel::validate($attributes=null, $clearErrors=true)

{

$this->beforeValidate()

foreach($this->getValidators() as $validator)$validator->validate($this,$attributes);

$this->afterValidate();

}

CModel::getValidators()

$this->_validators=$this->createValidators();

 public function createValidators() 

 {

  $validators=new CList;

  foreach($this->rules() as $rule) //从rule数组中读取规则

  {

   if(isset($rule[0],$rule[1])) // attributes, validator name

    $validators->add(CValidator::createValidator($rule[1],$this,$rule[0],array_slice($rule,2)));

   else

    throw new CException(Yii::t('yii','{class} has an invalid validation rule. The rule must specify attributes to be validated and the validator name.',

     array('{class}'=>get_class($this))));

  }

  return $validators;

 }

CValidator::createValidator($rule[1],$this,$rule[0],array_slice($rule,2))//如果Model类中有这个函数名，则直接用Model类中的函数，否则，创建系统默认的类，如CRequiredValidator

｛  if(method_exists($object,$name))

  {

   $validator=new CInlineValidator;

   $validator->attributes=$attributes;

   $validator->method=$name;

  else

  {

   $params['attributes']=$attributes;

   if(isset(self::$builtInValidators[$name]))

    $className=Yii::import(self::$builtInValidators[$name],true);

   else

    $className=Yii::import($name,true);

   $validator=new $className;

   foreach($params as $name=>$value)

    $validator->$name=$value;

  }

｝

CRequiredValidator::validateAttribute($object,$attribute) //最终调用对应的Validate类中的CValidator::validate函数调用子类的validateAttribute函数

 {

  $value=$object->$attribute;

  if($this->requiredValue!==null)

  {

   if(!$this->strict && $value!=$this->requiredValue || $this->strict && $value!==$this->requiredValue)

   {

    $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be {value}.',

     array('{value}'=>$this->requiredValue));

    $this->addError($object,$attribute,$message);

   }

  }

  elseif($this->isEmpty($value,$this->trim))

  {

   $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} cannot be blank.');

   $this->addError($object,$attribute,$message);

  }

 }