验证
数据库的某个
字段是否已经存在了相同的数据
首先，在lib目录建立一个 sfCustomUniqueValidator.php
复制内容到剪贴板
代码:
<?php
/**
* sfCustomUniqueValidator checks if a record exist in the database with all the mentionned fields.
*
* ex: Check if a companie with company_name exist in country_id
* class: sfCustomUniqueValidator
* param:
* class: Companies //the class on which the search is performed
* nb_fields: 2 //the number of fields on which the comparison is done
* field_1: company_name //First field of the comparison
* field_2: country_id //Other country for the comparison
*
* @package lib
* @author Joachim Martin
* @date 15/06/2007
*/
class sfCustomUniqueValidator extends sfValidator {
/**
* Executes this validator.
*
* @param mixed A file or parameter value/array
* @param error An error message reference
*
* @return bool true, if this validator executes successfully, otherwise false
*/
public function execute(&$value, &$error) {
$className = $this->getParameter('class').'Peer';
//Get fields number
$nb_fields = $this->getParameter('nb_fields');
//Define new criteria
$c = new Criteria();
//Loop on the fields
for($i = 1; $i <= $nb_fields ; $i++) {
//Retrieve field_$i
$check_param = $this->getParameterHolder()->get("field_$i");
$check_value = $this->getContext()->getRequest()->getParameter($check_param);
//If check value defined
if ($check_value != '') {
//Adding field to the criteria
$columnName = call_user_func(array($className, 'translateFieldName'), $check_param, BasePeer::TYPE_FIELDNAME, BasePeer::TYPE_COLNAME);
$c->add($columnName, $check_value);
}
}
$object = call_user_func(array($className, 'doSelectOne'), $c);
if ($object)
{
$tableMap = call_user_func(array($className, 'getTableMap'));
foreach ($tableMap->getColumns() as $column)
{
if (!$column->isPrimaryKey())
{
continue;
}
$method = 'get'.$column->getPhpName();
$primaryKey = call_user_func(array($className, 'translateFieldName'), $column->getPhpName(), BasePeer::TYPE_PHPNAME, BasePeer::TYPE_FIELDNAME);
if ($object->$method() != $this->getContext()->getRequest()->getParameter($primaryKey))
{
$error = $this->getParameter('custom_unique_error');
return false;
}
}
}
return true;
}
public function initialize ($context, $parameters = null) {
// initialize parent
parent::initialize($context);
//Set default parameters value
$this->setParameter('custom_unique_error','The value is not unique');
$this->getParameterHolder()->add($parameters);
// check parameters
if (!$this->getParameter('class'))
{
throw new sfValidatorException('The "class" parameter is mandatory for the sfCustomUniqueValidator validator.');
}
if (!$this->getParameter('nb_fields'))
{
throw new sfValidatorException('The "nb_fields" parameter is mandatory for the sfCustomUniqueValidator validator.');
}
return true;
}
}调用方法:
下面的代码检测companie表中是否已经有相同的记录
sfCustomUniqueValidator:
class: Companies
nb_fields: 3
field_1: company_name
field_2: activity_id
field_3: country_id
custom_unique_error: This company already exist for this country
class: 用来测试的model
nb_fields: 有几个字段要检测
field_x: 要检测的字段
custom_unique_error: 错误信息
