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106 lines
3.5 KiB
PHP
106 lines
3.5 KiB
PHP
<?php
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/**
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* CUniqueValidator class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright Copyright © 2008-2009 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CUniqueValidator validates that the attribute value is unique in the corresponding database table.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: CUniqueValidator.php 1298 2009-08-07 00:01:24Z qiang.xue $
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* @package system.validators
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* @since 1.0
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*/
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class CUniqueValidator extends CValidator
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{
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/**
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* @var boolean whether the comparison is case sensitive. Defaults to true.
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* Note, by setting it to false, you are assuming the attribute type is string.
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*/
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public $caseSensitive=true;
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/**
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* @var boolean whether the attribute value can be null or empty. Defaults to true,
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* meaning that if the attribute is empty, it is considered valid.
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*/
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public $allowEmpty=true;
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/**
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* @var string the ActiveRecord class name that should be used to
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* look for the attribute value being validated. Defaults to null, meaning using
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* the class of the object currently being validated.
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* You may use path alias to reference a class name here.
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* @see attributeName
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* @since 1.0.8
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*/
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public $className;
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/**
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* @var string the ActiveRecord class attribute name that should be
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* used to look for the attribute value being validated. Defaults to null,
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* meaning using the name of the attribute being validated.
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* @see className
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* @since 1.0.8
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*/
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public $attributeName;
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/**
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* @var array additional query criteria. This will be combined with the condition
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* that checks if the attribute value exists in the corresponding table column.
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* This array will be used to instantiate a {@link CDbCriteria} object.
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* @since 1.0.8
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*/
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public $criteria=array();
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/**
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* Validates the attribute of the object.
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* If there is any error, the error message is added to the object.
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* @param CModel the object being validated
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* @param string the attribute being validated
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*/
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protected function validateAttribute($object,$attribute)
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{
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$value=$object->$attribute;
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if($this->allowEmpty && ($value===null || $value===''))
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return;
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$className=$this->className===null?get_class($object):Yii::import($this->className);
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$attributeName=$this->attributeName===null?$attribute:$this->attributeName;
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$finder=CActiveRecord::model($className);
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$table=$finder->getTableSchema();
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if(($column=$table->getColumn($attributeName))===null)
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throw new CException(Yii::t('yii','Column "{column} does not exist in table "{table}".',
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array('{column}'=>$attributeName,'{table}'=>$table->name)));
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$columnName=$column->rawName;
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$criteria=new CDbCriteria(array(
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'condition'=>$this->caseSensitive ? "$columnName=:value" : "LOWER($columnName)=LOWER(:value)",
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'params'=>array(':value'=>$value),
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));
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if($this->criteria!==array())
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$criteria->mergeWith($this->criteria);
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if($column->isPrimaryKey || $this->className!==null)
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$exists=$finder->exists($criteria);
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else
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{
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// need to exclude the current record based on PK
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$criteria->limit=2;
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$objects=$finder->findAll($criteria);
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$n=count($objects);
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if($n===1)
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$exists=$objects[0]->getPrimaryKey()!=$object->getPrimaryKey();
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else
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$exists=$n>1;
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}
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if($exists)
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{
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$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} "{value}" has already been taken.');
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$this->addError($object,$attribute,$message,array('{value}'=>$value));
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}
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}
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}
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