CakePHP關聯問題

Question

我有很多理解CakePHP做他的關聯的方式的問題。 考慮以下數據庫配置：

我做在CakePHP的代碼的關係，就像這樣：

AbstractComponent

<?php 
App::uses('AppModel', 'Model'); 
/** 
* AbstractComponent Model 
* 
*/ 
class AbstractComponent extends AppModel { 
/** 
* Display field 
* 
* @var string 
*/ 
    public $displayField = 'id'; 

    public $hasOne = array(
     'DetailComponent' => array(
      'className' => 'DetailComponent', 
      'foreignKey' => 'component_id' 
     ) 
    ); 

    public $hasMany = array(
     'TargetComponent' => array(
      'className' => 'ListComponent', 
      'foreignKey' => 'target_component_id' 
     ), 
     'ListComponent' => array(
      'className' => 'ListComponent', 
      'foreignKey' => 'component_id' 
     ) 
    ); 

} 

ListComponent

<?php 
App::uses('AppModel', 'Model'); 
/** 
* ListComponent Model 
* 
*/ 
class ListComponent extends AppModel { 
/** 
* Display field 
* 
* @var string 
*/ 
    public $displayField = 'id'; 

    public $belongsTo = array(
     'AbstractComponent' => array(
      'className' => 'AbstractComponent', 
      'foreignKey' => 'component_id' 
     ) 
    ); 

    public $hasOne = array(
     'TargetComponent' => array(
      'className' => 'TargetComponent', 
      'foreignKey' => 'list_component_id' 
     ) 
    ); 
} 

TargetC omponent

<?php 
App::uses('AppModel', 'Model'); 
/** 
* TargetComponent Model 
* 
*/ 
class TargetComponent extends AppModel { 
/** 
* Display field 
* 
* @var string 
*/ 
    public $displayField = 'id'; 

    public $belongsTo = array(
     'ListComponent' => array(
      'className' => 'ListComponent', 
      'foreignKey' => 'list_component_id' 
     ) 
    ); 
} 

DetailComponent

<?php 
App::uses('AppModel', 'Model'); 
/** 
* DetailComponent Model 
* 
*/ 
class DetailComponent extends AppModel { 
/** 
* Display field 
* 
* @var string 
*/ 
    public $displayField = 'title_label_text'; 

    public $belongsTo = array(
     'AbstractComponent' => array(
      'className' => 'AbstractComponent', 
      'foreignKey' => 'component_id' 
     ) 
    ); 
} 

爲什麼，每當我到TargetComponents我添加視圖我不能選擇列表組件？ 如何訪問這些對象？所有其他關係正常工作，我可以選擇與我的數據庫中的記錄相對應的ID。

這是我的控制器的add函數：

public function add() { 
     if ($this->request->is('post')) { 
      $this->TargetComponent->create(); 
      if ($this->TargetComponent->save($this->request->data)) { 
       $this->Session->setFlash(__('The target component has been saved')); 
       $this->redirect(array('action' => 'index')); 
      } else { 
       $this->Session->setFlash(__('The target component could not be saved. Please, try again.')); 
      } 
     } 

     $list_components = $this->TargetComponent->ListComponent->find('list'); 
     $this->set(compact('list_components')); 
    } 

和我的觀點：

<div class="targetComponents form"> 
<?php echo $this->Form->create('TargetComponent');?> 
    <fieldset> 
     <legend><?php echo __('Add Target Component'); ?></legend> 
    <?php 
     echo $this->Form->input('type'); 
     echo $this->Form->input('list_components_id'); 
    ?> 
    </fieldset> 
<?php echo $this->Form->end(__('Submit'));?> 
</div> 
<div class="actions"> 
    <h3><?php echo __('Actions'); ?></h3> 
    <ul> 

     <li><?php echo $this->Html->link(__('List Target Components'), array('action' => 'index'));?></li> 
    </ul> 
</div> 

我堅持，並清楚地做一些窘況錯。

幫助非常感謝！

在此先感謝

-B

Answer 1

我與數據庫（1 int字段和Test爲VARCHAR字段）一些虛擬值測試了這個在我的本地蛋糕環境。事實證明，一切事實上都是正確聯繫的，但問題在於這個觀點。

由於某些原因，Cake不會自動將值放入list_components_id下拉列表中（儘管按照慣例它應該將$list_components數組放在那裏）。強制選項使它適用於我。因此，在視圖中，將：

echo $this->Form->input('list_components_id'); 

有了這個：

echo $this->Form->input('list_components_id', array('options' => $list_components)); 

這是卓有成效的，我和填充用的ID從ListComponents模型的下拉列表。