How to order data twice. But make the firts orderBy ineffective

问题

I'm trying to get last 100 posts from database and than order them by likecount or another property and output only 5 of them, that way I will discover most liked 5 posts or viewed, or reported out of last 100 posts. What I tried so far is like below:

$lastHundredPost = Post::orderBy('id', 'desc')->take(100);
$post = $lastHundredPost->orderBy('likecount', 'desc')->take(2)->get();

this does not disable first orderBy property.

Laravel 5.4

回答1:

If you want to get result from the first query, use collections:

$lastHundredPost = Post::orderBy('id', 'desc')->take(100)->get();
$post = $lastHundredPost->sortByDesc('likecount')->take(2);

回答2:

My first idea is to execute sql query and get 100 row, and then use sortBymethod of your collection.

$lastHundredPost = Post::orderBy('id', 'desc')->take(100)->get();

$lastHundredPost->sortBy('likecount')->take(2);

Another idea is to use orderByRaw:

$posts = Post::orderByRaw('likecount DESC, id DESC')->take(2)->get();

来源：https://stackoverflow.com/questions/48584669/how-to-order-data-twice-but-make-the-firts-orderby-ineffective