cakephp 3保存自我引用属于TonToy [英] cakephp 3 saving self referencing belongsToMany
问题描述
我有一个 nodes 表和一个 nodes_nodes 表.
nodes表+ ---- + -------- +|id |名称|+ ---- + -------- +|1 |节点1 ||2 |Node2 ||3 |节点3 ||4 |节点4 ||5 |节点5 |+ ---- + -------- +
nodes_nodes表+ ---- + ---------------- + --------------- +|id |parent_node_id |child_node_id |+ ---- + ---------------- + --------------- +|1 |2 |3 ||2 |1 |4 ||3 |1 |5 |+ ---- + ---------------- + --------------- +
一个节点可以有一个或多个父母和一个或多个孩子
A node can have one or more parents and one or more childs
NodesTable.php:
NodesTable.php:
public function initialize(array $config)
{
parent::initialize($config);
$this->table('nodes');
$this->displayField('name');
$this->primaryKey('id');
$this->addBehavior('Timestamp');
$this->belongsToMany('ChildNodes', [
'className' => 'Nodes',
'joinTable' => 'nodes_nodes',
'foreignKey' => 'parent_node_id',
'targetForeignKey' => 'child_node_id'
]);
$this->belongsToMany('ParentNodes', [
'className' => 'Nodes',
'joinTable' => 'nodes_nodes',
'foreignKey' => 'child_node_id',
'targetForeignKey' => 'parent_node_id'
]);
}
Node.php
class Node extends Entity
{
protected $_accessible = [
'*' => true,
'id' => false,
'ParentNodes' => true,
'ChildNodes' => true,
'_joinData' => true,
];
}
NodesController.php
NodesController.php
public function add()
{
$node = $this->Nodes->newEntity();
if ($this->request->is('post')) {
$node = $this->Nodes->patchEntity($node, $this->request->data);
debug($node);
if ($this->Nodes->save($node)) {
$this->Flash->success(__('The node has been saved.'));
return $this->redirect(['action' => 'index']);
}
$this->Flash->error(__('The node could not be saved. Please, try again.'));
}
$nodes = $this->Nodes->find('list', ['limit' => 200]);
$this->set(compact('node', 'nodes'));
$this->set('_serialize', ['node']);
}
add.ctp格式:
add.ctp form:
<?= $this->Form->create($node) ?>
<fieldset>
<legend><?= __('Add Node') ?></legend>
<?php
echo $this->Form->input('name');
echo $this->Form->input('ParentNodes._ids', ['options' => $nodes]);
echo $this->Form->input('ChildNodes._ids', ['options' => $nodes]);
?>
</fieldset>
<?= $this->Form->button(__('Submit')) ?>
<?= $this->Form->end() ?>
在add()函数中$ node实体调试的输出:
Output of $node entity debug in add() function:
object(App\Model\Entity\Node) {
'name' => 'Node6',
'ParentNodes' => [
'_ids' => [
(int) 0 => '15',
(int) 1 => '12'
]
],
'ChildNodes' => [
'_ids' => [
(int) 0 => '13'
]
],
'[new]' => true,
'[accessible]' => [
'*' => true,
'ParentNodes' => true,
'ChildNodes' => true,
'_joinData' => true
],
'[dirty]' => [
'name' => true,
'ParentNodes' => true,
'ChildNodes' => true
],
'[original]' => [],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'Nodes'
}
当我保存一个新节点时，关联未保存.我尝试添加 ['associated'=>[code] $ this-> Nodes-> save()上的['ParentNodes'，'ChildNodes']] 没有成功
When I save a new node the association is not saved.
I have tryed adding ['associated' => ['ParentNodes', 'ChildNodes']] on $this->Nodes->save() with no success
推荐答案
您没有正确遵循命名约定.默认情况下， belongsToMany 关联的属性名称是小写的，加了下划线的关联别名的复数形式，即 parent_nodes 和 child_nodes .如果需要，可以通过 propertyName 关联选项进行更改.
You're not following the naming conventions properly. Property names for belongsToMany associations are by default lowercase, underscored plural variants of the association aliases, ie parent_nodes and child_nodes. In case required, this can be changed via the propertyName association option.
echo $this->Form->input('parent_nodes._ids', ['options' => $nodes]);
echo $this->Form->input('child_nodes._ids', ['options' => $nodes]);
如果将 * 设置为 true ，则无需将属性添加到 $ _ accessible ，因为这样可以使所有内容分配的数量.
Also there's no need to add the properties to $_accessible if you've set * to true, as that allows everything to be mass assigned.
另请参见
这篇关于cakephp 3保存自我引用属于TonToy的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
