在Cakephp 3中使用BelongsToMany关联

Question

我想将多个游戏关联到数据库中的连续性。

我有3个表格：continuities，continuities_games和games。 continuities_games表有一个continuity_id和一个game_id。当我尝试在我的选择输入中选择不同的游戏时，它会在数据库中创建一个新的游戏入口，然后在连接表中创建一个条目，将其链接到新的游戏条目，而不是将其链接到最初选择的游戏。

这是我ContinuitiesTable初始化函数：

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

而对于我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'); 
} 

这是ContinuitiesController我的编辑功能：

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')); 
} 

最后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() ?> 

谢谢。

Answer 1

有几件事情需要改变才能完成这项工作。

首先是连续性表：

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

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

接下来，游戏表：

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

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

现在，ContinuitiesController编辑（）函数：

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')); 
} 

最后， 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() ?>