CakePHP模型擴展關聯

Question

在查看InventoryCategory摘要時，我可以獲取庫存但不包括InventoryImages。 CakePHP報告的錯誤是[Model「Inventory」與模型「InventoryImage」]沒有關聯。這是我採用的型號：

class InventoryCategory extends InventoriesAppModel { 
public $hasMany = 
    array(
      'Inventory' 
     , 'InventoryCategoryImage' => array 
      (
        'className' => 'Media.MediaImage' 
       , 'foreignKey' => 'foreign_key' 
       , 'conditions' => array(
           'InventoryCategoryImage.model' => 'InventoryCategoryImage' 
          , 'InventoryCategoryImage.group' => 'Inventory Category Image' 
          , 
       ) 
       , 'dependent' => true 
       , 
      ) 
     , 
    ); 

public function containedModels() 
{ 
    $contain = array(
       'Inventory' 
      , 'InventoryCategoryImage' 
      , 
    ); 
    return $contain; 
} 

} 

class Inventory extends InventoriesAppModel { 

public $belongsTo = 
    array(
      'User' 
     , 'InventoryCategory' 
     , 
    ); 

public $hasMany = 
    array(
      'InventoryImage' => array 
      (
        'className' => 'Media.MediaImage' 
       , 'foreignKey' => 'foreign_key' 
       , 'conditions' => array(
           'InventoryImage.model' => 'InventoryImage' 
          , 'InventoryImage.group' => 'Inventory Image' 
          , 
       ) 
       , 'dependent' => true 
       , 'order' => 'InventoryImage.rank ASC, InventoryImage.id ASC' 
      ) 
     , 
    ); 

public function containedModels() 
{ 
    $contain = array(
       'User' 
      , 'InventoryCategory' 
      , 
    ); 
    return $contain; 
} 

} 

Answer 1

的問題是，通過宣佈在InventoryCategory$hasMany替換和刪除從其父類$hasMany陣列。

因此$hasMany聲明還應包含父項的關聯才能使其工作。

另一種方法是將新關聯添加到父項$hasMany數組。
這裏的問題是：使用什麼回調。我不知道（我也在尋找答案）。到目前爲止，我認爲public function __construct()是最合適的。

像這樣：

public function __construct($id = false, $table = null, $ds = null) { 
    parent::__construct(); 

    // adding Blog-specific Card-association. 
    // Blog is a class extending some other class that does not know about the Class association. 
    $this->belongsTo['Card'] = array(
     'className' => 'Card', 
     'foreignKey' => 'card_id' 
    ); 
}