relations-recent-comment-on-post-using-scopeSince.php

<?php

namespace App;

use Carbon\Carbon;
use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    public function comments()
    {
        return $this->hasMany(Comment::class);
    }

    public function recentComments()
    {
        return $this->hasMany(Comment::class)
            ->since('created_at', '>', Carbon::yesterday());
    }
}