将标记保存到CakePHP中的数据库表中

时间:2012-04-15 11:26:04

标签: php cakephp

我的CakePHP应用程序有以下设置:

Posts
id
title
content

Topics
id
title

Topic_Posts
id
topic_id
post_id

所以基本上我有一个主题(标签)表,它们都是唯一的,并且有一个id。然后可以使用Topic_Posts连接表将它们附加到post。当用户创建新帖子时,他们将通过键入以逗号分隔的文本区来填写主题,然后将这些主题保存到主题表中(如果它们尚不存在),然后将引用保存到Topic_posts表中。我的模型设置如下:

发布模型:

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模型:

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

对于New post方法,到目前为止我有这个:

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!');
        }
    }
}

正如您所看到的,我使用过saveAll但是如何处理主题数据呢?

我见过这样的事情:http://bakery.cakephp.org/articles/dooltaz/2007/05/02/simple-tagging-behavior但我希望这样做更简单,更现代(那篇文章是2007年),我也在使用CakePHP 2.1

1 个答案:

答案 0 :(得分:3)

我会在Topic(Model)中实现一个方法,如下所示:

/**
 * 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,但它应该可以工作。

您可以在保存帖子之后调用此方法,为其提供帖子ID和数据数组中的主题。确保您处理该方法的返回。如果主题保存失败,这是删除整个帖子的原因吗?由于cakephp中没有很好的实现回滚api,如果你愿意,你可能不得不从数据库中删除帖子。或者您只是向撰写帖子的用户发送成功消息并记录错误?

顺便说一句:遵循cakephp惯例,模型和关联表也必须命名为 PostTopic post_topic 。按字母顺序;)您可能希望在项目的早期状态中更改它。

问候 func0der