/
IsUnique.php
95 lines (86 loc) · 2.73 KB
/
IsUnique.php
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<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\ORM\Rule;
use Cake\Datasource\EntityInterface;
/**
* Checks that a list of fields from an entity are unique in the table
*/
class IsUnique
{
/**
* The list of fields to check
*
* @var array
*/
protected $_fields;
/**
* Constructor.
*
* @param array $fields The list of fields to check uniqueness for
*/
public function __construct(array $fields)
{
$this->_fields = $fields;
}
/**
* Performs the uniqueness check
*
* @param \Cake\Datasource\EntityInterface $entity The entity from where to extract the fields
* @param array $options Options passed to the check,
* where the `repository` key is required.
* @return bool
*/
public function __invoke(EntityInterface $entity, array $options)
{
if (!$entity->extract($this->_fields, true)) {
return true;
}
$checkNull = isset($options['checkNull']) ? true : false;
$alias = $options['repository']->alias();
$conditions = $this->_alias($alias, $entity->extract($this->_fields));
if ($entity->isNew() === false) {
$keys = (array)$options['repository']->primaryKey();
$keys = $this->_alias($alias, $entity->extract($keys));
if (array_filter($keys, 'strlen')) {
$conditions['NOT'] = $keys;
}
}
if($checkNull) {
// Thanks to ndm
foreach ($conditions as $key => $value) {
if ($value === null) {
$conditions[$key . ' IS'] = $value;
unset($conditions[$key]);
}
}
}
return !$options['repository']->exists($conditions);
}
/**
* Add a model alias to all the keys in a set of conditions.
*
* @param string $alias The alias to add.
* @param array $conditions The conditions to alias.
* @return array
*/
protected function _alias($alias, $conditions)
{
$aliased = [];
foreach ($conditions as $key => $value) {
$aliased["$alias.$key"] = $value;
}
return $aliased;
}
}