关系函数在Laravel中不起作用

Question

订购者正在为此工作...

$posts   = PostClass::where('thread_id',1)->orderBy('id','desc')->paginate(20);

但按此顺序不起作用。

$thread = ThreadClass::find(1);
$posts   = $thread->posts()->orderBy('id','desc')->paginate(20);

Laravel版本：5.5

Answer 1

要允许orderBy在相关帖子上发生，您可以将dynamic属性作为一种关联方法来访问。

$posts = $thread->posts()->orderBy('posts.id','desc')->paginate(20);