ss-visit/app/Models/Blacklist.php

<?php
namespace App\Models;

class Blacklist extends SoftDeletesModel
{
     protected $guarded = ['id'];

    protected $appends = ['file_detail'];

    protected $casts = [
        'file'=>'json'
    ];

    public function getFileDetailAttribute()
    {
        if (empty($this->file)) {
            return [];
        }
        return Upload::whereIn('id', $this->file)->get();
    }
}