solarai/app/Models/BoardArticle.php

<?php
namespace App\Models;

use App\Casts\EncryptFixed;
use Carbon\Carbon;

class BoardArticle extends BaseSoftDeleteModel
{
    protected $table = 'board_article';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'board_id', 'uid',
        'notice', 'image', 'category',
        'name', 'email', 'phone',
        'subject', 'content', 'related_link',
        'view_count',
        'created_id', 'created_at'
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
    ];

    protected $visible = [
        'id', 'board_id', 'uid',
        'notice', 'image', 'category',
        'name', 'email', 'phone',
        'subject', 'content', 'related_link',
        'view_count',
        'created_id', 'created_at',
        'is_new',
        'assets', 'assets_count',
        'comments', 'comments_count'
    ];

    protected $appends = [
        'is_new'
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array<string, string>
     */
    protected $casts = [
    ];

    public function getIsNewAttribute()
    {
        if ($this->created_at) {
            return $this->created_at->diffInHours(Carbon::now()) <= 24;
        }

        return false;
    }

    public function board()
    {
        return $this->belongsTo('App\Models\Board', 'board_id');
    }

    public function asset()
    {
        return $this->belongsTo('App\Models\Asset', 'image', 'uid');
    }

    public function assets()
    {
        return $this->hasMany('App\Models\BoardAsset', 'article_id');
    }

    public function comments()
    {
        return $this->hasMany('App\Models\BoardComment', 'article_id');
    }

    public function user()
    {
        return $this->belongsTo('App\Models\User', 'created_id');
    }
}