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                >[danger] `together()` 關聯刪除 ~~~ $article = Article::find(1); // 刪除文章的同時刪除下面的評論 // 刪除 comments 方法關聯到的數據 // comments 一對多關聯方法 $article->together(['comments'])->delete(); // 刪除多個關聯方法關聯的數據 // comments、likes 一對多關聯方法 $article->together(['comments', 'likes'])->delete(); ~~~ >[danger] 注意事項 + together() 是模型數據對象的方法,不是數據集對象的方法 ~~~ $data = self::with(['topics'])->select(); foreach ($data as $v) { $v->together(['topics'])->delete(); } ~~~ + 遠程一對多關聯 ~~~ /** * hasManyThrough() 遠程一對多關聯 */ public function topics() { // hasManyThrough('遠程表模型類', '中間表模型類', '中間表外鍵字段', '遠程表外鍵字段'); return $this->hasManyThrough(Topic::class, User::class, 'city_id', 'user_id'); } ~~~
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