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<?php
/**
* CRequiredValidator class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CRequiredValidator validates that the specified attribute does not have null or empty value.
*
* When using the {@link message} property to define a custom error message, the message
* may contain additional placeholders that will be replaced with the actual content. In addition
* to the "{attribute}" placeholder, recognized by all validators (see {@link CValidator}),
* CRequiredValidator allows for the following placeholders to be specified:
* <ul>
* <li>{value}: replaced with the desired value {@link requiredValue}.</li>
* </ul>
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.validators
* @since 1.0
*/
class CRequiredValidator extends CValidator
{
/**
* @var mixed the desired value that the attribute must have.
* If this is null, the validator will validate that the specified attribute does not have null or empty value.
* If this is set as a value that is not null, the validator will validate that
* the attribute has a value that is the same as this property value.
* Defaults to null.
*/
public $requiredValue;
/**
* @var boolean whether the comparison to {@link requiredValue} is strict.
* When this is true, the attribute value and type must both match those of {@link requiredValue}.
* Defaults to false, meaning only the value needs to be matched.
* This property is only used when {@link requiredValue} is not null.
*/
public $strict=false;
/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param CModel $object the object being validated
* @param string $attribute the attribute being validated
*/
protected function validateAttribute($object,$attribute)
{
$value=$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,true))
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} cannot be blank.');
$this->addError($object,$attribute,$message);
}
}

/**
* Returns the JavaScript needed for performing client-side validation.
* @param CModel $object the data object being validated
* @param string $attribute the name of the attribute to be validated.
* @return string the client-side validation script.
* @see CActiveForm::enableClientValidation
* @since 1.1.7
*/
public function clientValidateAttribute($object,$attribute)
{
$message=$this->message;
if($this->requiredValue!==null)
{
if($message===null)
$message=Yii::t('yii','{attribute} must be {value}.');
$message=strtr($message, array(
'{value}'=>$this->requiredValue,
'{attribute}'=>$object->getAttributeLabel($attribute),
));
return "
if(value!=" . CJSON::encode($this->requiredValue) . ") {
messages.push(".CJSON::encode($message).");
}
";
}
else
{
if($message===null)
$message=Yii::t('yii','{attribute} cannot be blank.');
$message=strtr($message, array(
'{attribute}'=>$object->getAttributeLabel($attribute),
));
return "
if(jQuery.trim(value)=='') {
messages.push(".CJSON::encode($message).");
}
";
}
}
}
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