CakePHP DropDown與父母和孩子

Question

從這裏開始是一個例子，我想要使用Cake-php的方式來創建一個組合框從兩個表類別和子類填充。

-- Category1 
--- Subcategory1 
--- Subcategory2 
--- ... 
-- Category2 
--- Subcategory1 
--- Subcategory2 
--- ... 

在我的控制器我試圖讓使用代碼波紋管其子類別的清單，但沒有奏效，它只是返回子類別的清單：

$this->set('category',($this->category->subcategory->find('list'))); 

這裏是協會我使用的模型之間：

分類模型

<?php 

class category extends AppModel{ 

     public $hasMany=array(

       'subcategory'=>array(
         'className'=>'subcategories', 

        ) 

      ); 

} 

子類別型號

<?php 

class subcategory extends AppModel{ 


    public $belongsTo=array(

     'category'=>array(
       'className'=>'categories', 
       'foreignKey'=> 'categories_id' 
      ) 

     ); 


} 

我希望我的問題很清楚並且非常感謝。

Answer 1

$options = array(); 
foreach($this->Category->find('all') as $key => $category) { 
    $options[$category['Category']['name']] = $this->Category->SubCategory->find('list') 
} 
$this->set('category', $options); 

Answer 2

$data = $this->Category->find('all', array('contain' => 'SubCategory')); 
    $categories = array(); 
    foreach ($data as $key => $category) { 
     $categories[$category['category']['title']] = array(); 
     foreach($category['subcategories'] as $subcategory) { 
      array_push($categories[$category['category']['title']], $subcategory['title']); 
     } 
    } 

    pr($categories);