Question

我有这些模特：

class Article extends \yii\db\ActiveRecord
{
    .....

    public function getTags()
    {
        return $this->hasMany(Tag::className(), ['id' => 'tag_id'])->viaTable('rel_tag_article', ['article_id' => 'id']);
    }

}

class News extends \yii\db\ActiveRecord
{
    .....

    public function getTags()
    {
        return $this->hasMany(Tag::className(), ['id' => 'tag_id'])->viaTable('rel_tag_news', ['news_id' => 'id']);
    }

}

class Tag extends \yii\db\ActiveRecord
{
    .....

    public function getRelTagArticles()
    {
        return $this->hasMany(RelTagArticle::className(), ['tag_id' => 'id']);
    }

    public function getRelTagNews()
    {
        return $this->hasMany(RelTagNews::className(), ['tag_id' => 'id']);
    }
}

在控制器中

class ArticleController extends \yii\web\Controller
{
    public function actionArticle($id_article)
    {


    $article = User::find($id_article);

    ...... here ....


    return $this->render('article');
    }

}

在...here...下，我必须找到与我的实际文章有共同标签的新闻。什么是正确的方法？

Answer 1

##您可以使用文章活动记录来获取标签，然后使用标签来获取新闻##

   class ArticleController extends \yii\web\Controller
    {
      public function actionArticle($id_article)
      {              
        $article = User::find($id_article);
        $tags=$article->tags;
        $related_news=array();
        foreach($tags as $tag) {
          $related_news=array_merge($tag->getRelTagNews(),$related_news);
        }

        return $this->render('related_news');
      }        
    }

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