2012-04-15 81 views
0

数据库表我有以下设置为我的CakePHP应用程序:保存标签到CakePHP中

Posts 
id 
title 
content 

Topics 
id 
title 

Topic_Posts 
id 
topic_id 
post_id 

所以基本上我的主题(标签)的表都是独一无二的,并有一个ID。然后可以使用Topic_Posts连接表附加它们以发布。当用户创建新帖子时,他们将填入主题,方法是将用逗号分隔的textarea输入,然后将它们保存到主题表中(如果它们尚不存在),然后将引用保存到Topic_posts表中。我已经建立了像这样的模式:

Post模型:

class Post extends AppModel 
{ 
    public $name = 'Post'; 

    public $hasAndBelongsToMany = array(
     'Topic' => array('with' => 'TopicPost') 
    ); 
} 

主题模型:

class Topic extends AppModel 
{ 
    public $hasMany = array(
     'TopicPost' 
    ); 
} 

TopicPost型号:

class TopicPost extends AppModel { 
    public $belongsTo = array(
     'Topic', 'Post' 
    ); 
} 

并为新的POST方法我有这个到目前为止:

public function add() 
{ 
    if ($this->request->is('post')) 
    { 
     //$this->Post->create(); 

     if ($this->Post->saveAll($this->request->data)) 
     { 

      // Redirect the user to the newly created post (pass the slug for performance) 
      $this->redirect(array('controller'=>'posts','action'=>'view','id'=>$this->Post->id)); 
     } 
     else 
     { 
      $this->Session->setFlash('Server broke!'); 
     } 
    } 
} 

正如你所看到的我已经使用saveAll但我该如何处理主题数据?

我见过类似的事情:http://bakery.cakephp.org/articles/dooltaz/2007/05/02/simple-tagging-behavior但我要做到这一点非常简单并且更现代化(即文章日期2007年),我还使用CakePHP的2.1

回答

3

我会实现的方法这样的主题(型号):

/** 
* This methods saves the topics coming from a post save and associates them with the right post. 
* 
* @param string $postId The post id to save associations to. 
* @param string $topics A comma seperated list of topics to save. 
* @param bool Save of all topics succeeded (true) or not (false). 
*/ 
    public function savePostTopics($postId, $topics){ 
     // Explode the topics by comma, so we have an array to run through 
     $topics = explode(',', $topics); 
     // Array for collecting all the data 
     $collection = array(); 

     foreach($topics as $topic){ 
      // Trim it so remove unwanted white spaces in the beginning and the end. 
      $topic = trim($topic); 

      // Check if we already have a topic like this 
      $controlFind = $this->find(
       'first', 
       array(
        'conditions' => array(
         'title' => $topic 
        ), 
        'recursive' => -1 
       ) 
      ); 

      // No record found 
      if(!$controlFind){ 
       $this->create(); 
       if(
        !$this->save(
         array(
          'title' => $topic 
         ) 
        ) 
       ){ 
        // If only one saving fails we stop the whole loop and method. 
        return false; 
       } 
       else{ 
        $temp = array(
         'TopicPost' => array(
          'topic_id' => $this->id, 
          'post_id' => $postId 
         ) 
        ) 
       } 
      } 
      else{ 
       $temp = array(
        'TopicPost' => array(
         'topic_id' => $controlFind['Topic']['id'], 
         'post_id' => $postId 
        ) 
       ) 
      } 
      $collection[] = $temp; 
     } 

     return $this->TopicPost->saveMany($collection, array('validate' => false)); 
    } 

我没有测试它,但它应该工作。

你可以调用这个AFTER保存帖子本身,为它提供帖子ID和数据数组中的主题。确保你处理该方法的返回。如果主题保存失败,这是删除整篇文章的原因?由于在cakephp中没有很好的实现回滚API,如果你愿意的话,你可能不得不从数据库中删除这个帖子。或者,您是否只向撰写帖子并记录错误的用户提供了成功信息?

顺便说一句:继CakePHP的约定模型和关联表也被命名为PostTopicpost_topic。按字母顺序;)您可能需要在项目的早期阶段更改它。

问候 func0der

+0

真棒,工作正常。我没有改变任何我的表名或模型名称?谢谢;) – Cameron 2012-04-15 14:48:49

+0

不,你不需要改变它。但通过cakephp约定,您应该;) 通读本:http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#hasandbelongstomany-habtm(示例下方的信息框) – func0der 2012-04-16 10:20:55