Order by Pivot Fields

BelongsToMany::orderByPivot() allows you to directly sort the results of a BelongsToMany relationship query.

 1class Tag extends Model
 2{
 3    public $table = 'tags';
 4}
 5 
 6class Post extends Model
 7{
 8    public $table = 'posts';
 9 
10    public function tags()
11    {
12        return $this->belongsToMany(Tag::class, 'post_tag', 'post_id', 'tag_id')
13            ->using(PostTagPivot::class)
14            ->withTimestamps()
15            ->withPivot('flag');
16    }
17}
18 
19class PostTagPivot extends Pivot
20{
21    protected $table = 'post_tag';
22}
23 
24// Somewhere in the Controller
25public function getPostTags($id)
26{
27    return Post::findOrFail($id)->tags()->orderByPivot('flag', 'desc')->get();
28}

Tip given by @PascalBaljet