xiaoben-as2-php/protected/extensions/MongoYii/validators/EMongoExistValidator.php

<?php

/**
 * EExistValidator validates that the attribute value exists in a table.
 *
 * This validator is often used to verify that a foreign key contains a value
 * that can be found in the foreign table.
 *
 * 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}),
 * CExistValidator allows for the following placeholders to be specified:
 * <ul>
 * <li>{value}: replaced with value of the attribute.</li>
 * </ul>
 *
 * @see CExistValidator
 */
class EMongoExistValidator extends CValidator
{
	/**
	 * @var boolean whether the comparison is case sensitive. Defaults to true.
	 * Note, by setting it to false, you are assuming the attribute type is string.
	 */
	public $caseSensitive = true;
	
	/**
	 * @var string the ActiveRecord class name that should be used to
	 * look for the attribute value being validated. Defaults to null,
	 * meaning using the ActiveRecord class of the attribute being validated.
	 * You may use path alias to reference a class name here.
	 * @see attributeName
	 */
	public $className;
	
	/**
	 * @var string the ActiveRecord class attribute name that should be
	 * used to look for the attribute value being validated. Defaults to null,
	 * meaning using the name of the attribute being validated.
	 * @see className
	 */
	public $attributeName;
	
	/**
	 * @var mixed additional query criteria. Either an array or CDbCriteria.
	 * This will be combined with the condition that checks if the attribute
	 * value exists in the corresponding table column.
	 * This array will be used to instantiate a {@link CDbCriteria} object.
	 */
	public $criteria = array();
	
	/**
	 * @var boolean whether the attribute value can be null or empty. Defaults to true,
	 * meaning that if the attribute is empty, it is considered valid.
	 */
	public $allowEmpty = true;
	
	public $mongoId = 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->allowEmpty && $this->isEmpty($value)){
			return;
		}

		$className = $this->className === null ? get_class($object) : Yii::import($this->className);
		$attributeName = $this->attributeName === null ? $attribute : $this->attributeName;
		$finder = EMongoDocument::model($className);

		$criteria = array($attributeName => $this->mongoId ? new MongoId($value) : $value);
		if(!$finder->exists($criteria)){
			$message = $this->message !== null ? $this->message : Yii::t('yii', '{attribute} "{value}" is invalid.');
			$this->addError($object, $attribute, $message, array('{value}' => CHtml::encode($value)));
		}
	}
}