XLJK-api/app/Models/UsefulCount.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class UsefulCount extends Model
{
    protected $table = 'useful_count';
    protected $primaryKey = 'id';

    const CREATED_AT = 'creation_date';
    public static function getInfo(int $problem_id)
    {
        return self::query()->where('problem_id', $problem_id)->first();
    }
    public static function insertData(array $data)
    {
        return self::query()->insert($data);
    }
}