[英]Yii 2 search in 2 many to many relation
我有這些模型:
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 $this->hasMany(RelTagNews::className(), ['tag_id' => 'id']);
}
}
並在控制器中
class ArticleController extends \yii\web\Controller
{
public function actionArticle($id_article)
{
$article = User::find($id_article);
...... here ....
return $this->render('article');
}
}
在...here...
我必須找到與我的實際文章有共同標簽的新聞。 什么是正確的方法?
##您可以使用文章活動記錄來獲取標簽,然后使用標簽來獲取新聞##
class ArticleController extends \yii\web\Controller
{
public function actionArticle($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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