How to get index of element in Laravel collection

Question

How to retrieve the index of an element in a collection ? My code :

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

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

Thank's for help

newUserName02 · Accepted Answer · 2018-12-07T01:31:36.300

28

You can use the collection search() method: 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();
});

Just be careful, because the index might be 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
}

edited Dec 07 '18 at 01:31

answered Dec 07 '18 at 01:26

newUserName02

1,598
12
17

This is not working if the collection was sorted (after initialization). The doc states the it will return the 'key' of the item. While the index(position in list) might be different. – DoruChidean Sep 01 '23 at 08:25

score 0 · Answer 2 · edited Mar 17 '23 at 14:54

0

In model class:

protected $appends = ['row'];

public function getRowAttribute()
{
    return $this->where('id', '<', $this->id)->count();
}

In php code:

$row = $model_name->row;

edited Mar 17 '23 at 14:54

ugexe

5,297
1
28
49

answered Mar 16 '23 at 08:28

Hatem Mostafa

29
3

score -1 · Answer 3 · answered Dec 29 '20 at 21:53

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

// this return a collection. So can do an if like this: $userIndex->count() > 0
$userIndex = $users->filter(function($user) {
    return $user->id === Auth::id()
});

How to get index of element in Laravel collection

3 Answers3