我创建了<div>：
src/Model/Behavior/ModernTreeBehavior.php我在CommentTables.php中使用了<?php
namespace Cake\ORM\Behavior;
use Cake\Datasource\EntityInterface;
use Cake\Datasource\Exception\RecordNotFoundException;
use Cake\Event\Event;
use Cake\ORM\Behavior;
use Cake\ORM\Entity;
use Cake\ORM\Query;
use InvalidArgumentException;
use RuntimeException;
class ModernTreeBehavior extends Behavior
{
/**
* Cached copy of the first column in a table's primary key.
*
* @var string
*/
protected $_primaryKey;
/**
* Default config
*
* These are merged with user-provided configuration when the behavior is used.
*
* @var array
*/
protected $_defaultConfig = [
'implementedFinders' => [
'children' => 'findChildren',
'treeList' => 'findTreeList'
],
'implementedMethods' => [
'childCount' => 'childCount',
'getLevel' => 'getLevel'
],
'parent' => 'parent_id',
'path' => 'path',
'scope' => null,
'level' => null
];
public function getLevel($entity)
{
$primaryKey = $this->_getPrimaryKey();
$id = $entity;
if ($entity instanceof EntityInterface) {
$id = $entity->get($primaryKey);
}
$config = $this->config();
$entity = $this->_table->find('all')
->select([$config['path']])
->where([$primaryKey => $id])
->first();
if ($entity === null) {
return false;
}
return substr_count($entity[$config['path']], '-') + 1;
}
/**
* Returns a single string value representing the primary key of the attached table
*
* @return string
*/
protected function _getPrimaryKey()
{
if (!$this->_primaryKey) {
$this->_primaryKey = (array)$this->_table->primaryKey();
$this->_primaryKey = $this->_primaryKey[0];
}
return $this->_primaryKey;
}
}
我收到错误$this->addBehavior('ModernTree');
但是，如果我将Fatal error: Cannot redeclare class Cake\ORM\Behavior\ModernTreeBehavior in .../src/Model/Behavior/ModernTreeBehavior.php on line 0粘贴到内置文件/src/Model/Behavior/ModernTreeBehavior.php并加载TreeBehavior.php，那么一切都是如此。
你能告诉我原因吗？
答案 0 :(得分：1)
您的类的名称空间声明是错误的，它应该是：
namespace App\Model\Behavior;