在Cakephp 3中使用BelongsToMany關聯

Question

我想將多個遊戲關聯到數據庫中的連續性。

我有3個表格：continuities，continuities_games和games。 continuities_games表有一個continuity_id和一個game_id。當我嘗試在我的選擇輸入中選擇不同的遊戲時，它會在數據庫中創建一個新的遊戲入口，然後在連接表中創建一個條目，將其鏈接到新的遊戲條目，而不是將其鏈接到最初選擇的遊戲。

這是我ContinuitiesTable初始化函數：

public function initialize(array $config){ 
    parent::initialize($config); 
    $this->belongsToMany('Games'); 
} 

而對於我GamesTable：

public function initialize(array $config){ 
    parent::initialize($config); 
    $this->displayField('name'); 
    $this->addBehavior('Tree'); 

    //Associations 
    $this->hasMany('Children', [ 
     'className' => 'Games', 
     'foreignKey' => 'parent_id', 
     'dependant' => true, 
     'cascadeCallbacks' => true, 
    ]); 
    $this->belongsTo('Parent', [ 
     'className' => 'Games', 
    ]); 
    $this->hasMany('Books'); 
    $this->belongsToMany('Continuities'); 
} 

這是ContinuitiesController我的編輯功能：

public function edit($id=null){ 
    $continuity = $this->Continuities->find()->where(['id'=>$id])->contain('Games')->first(); 
    if ($this->request->is(['post', 'put'])) { 
     debug($this->request->data); 
     $continuity->start_date = $this->request->data['start_date']['year'].'-'.$this->request->data['start_date']['month'].'-'.$this->request->data['start_date']['day']; 
     $continuity->end_date = $this->request->data['end_date']['year'].'-'.$this->request->data['end_date']['month'].'-'.$this->request->data['end_date']['day']; 
     //$continuity->start_date = $this->request->data['start_date']; 
     //$continuity->end_date = $this->request->data['end_date']; 

     $continuity->games = $this->request->data['games']; 

     debug($this->Continuities->newEntity($this->request->data)->toArray()); 
     debug($continuity); 
     if ($result = $this->Continuities->save($continuity, ['associated'=>['Games']])) { 
      $this->Flash->success(__('The continuity has been updated.')); 
      return $this->redirect(['action' => 'view', $continuity->id]); 
     } 
     $this->Flash->error(__('Unable to update the continuity.')); 
    } 

    $games = $this->Continuities->Games->getGamesList(); 
    $this->set(compact('continuity', 'games')); 
} 

最後edit.ctp格式：

<?= $this->Form->create($continuity) ?> 
    <fieldset> 
     <legend><?= __('Edit Continuity') ?></legend> 
     <?= $this->Form->input('start_date') ?> 
     <?= $this->Form->input('end_date') ?> 
     <?= $this->Form->input('games', ['multiple'=>true]) ?> 
    </fieldset> 
<?= $this->Form->button(__('Submit')); ?> 
<?= $this->Form->end() ?> 

謝謝。

Answer 1

有幾件事情需要改變才能完成這項工作。

首先是連續性表：

public function initialize(array $config){ 
    parent::initialize($config); 

    $this->belongsToMany('Games', 
     [ 
      'targetForeignKey' => 'game_id', 
      'foreignKey' => 'continuity_id', 
      'joinTable' => 'continuities_games', 
     ]); 
} 

接下來，遊戲表：

public function initialize(array $config){ 
    parent::initialize($config); 

    $this->belongsToMany('Continuities', 
     [ 
      'targetForeignKey' => 'continuity_id', 
      'foreignKey' => 'game_id', 
      'joinTable' => 'continuities_games', 
     ]); 
} 

現在，ContinuitiesController編輯（）函數：

public function edit($id=null){ 
    $continuity = $this->Continuities->find()->where(['id'=>$id])->contain('Games')->first(); 

    if ($this->request->is(['post', 'put'])) { 
     $this->Continuities->patchEntity($continuity, $this->request->data(), ['associated'=>['Games']]); 
     if ($result = $this->Continuities->save($continuity, ['associated'=>['Games']])) { 
      $this->Flash->success(__('The continuity has been updated.')); 
      return $this->redirect(['action' => 'view', $continuity->id]); 
     } 
     $this->Flash->error(__('Unable to update the continuity.')); 
    } 

    $games = $this->Continuities->Games->getGamesList(); 
    $this->set(compact('continuity', 'games')); 
} 

最後， edit.ctp

<?= $this->Form->create($continuity) ?> 
    <fieldset> 
     <legend><?= __('Edit Continuity') ?></legend> 
     <?= $this->Form->input('start_date') ?> 
     <?= $this->Form->input('end_date') ?> 
     <?= $this->Form->input('games._ids', ['options' => $games, 'multiple'=>true]) ?> 
    </fieldset> 
<?= $this->Form->button(__('Submit')); ?> 
<?= $this->Form->end() ?>