php - 如何获取 Laravel 集合中元素的索引

Question

如何检索集合中元素的索引？ 我的代码:

$users = User::has('posts')->withCount('posts')->orderBy('posts_count')->take(50)->get();

if($users->contains(Auth::id())){
    //get the index of auth user id
 }

谢谢你的帮助

Answer 1

您可以使用集合search() 方法:https://laravel.com/docs/5.7/collections#method-search

$users = User::has('posts')->withCount('posts')->orderBy('posts_count')->take(50)->get();

$userIndex = $users->search(function($user) {
    return $user->id === Auth::id();
});

请小心，因为索引可能为 0:

// DON'T do this
if($userIndex) {
    // this will get skipped if the user is the first one in the collection
}

// Do this instead
if($userIndex !== false) {
    // this will work
}