test/app/Http/Models/LadingBill.php

<?php

namespace App\Http\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class LadingBill extends Model
{
    use SoftDeletes;
    protected $primaryKey = 'id';
    protected $table = 'lading_bills';
    protected $guarded = [];

    public function site()
    {
        return $this->hasOne(Site::class, 'id', 'site_id');
    }

    protected $casts = [
        'contract_file' => 'array'
    ];

    public function agent()
    {
        return $this->hasOne(Agent::class, 'user_id', 'user_id');
    }

    public function user()
    {
        return $this->hasOne(User::class, 'id', 'user_id');
    }

    const AUDIT = [
        1 => '审核中',
        2 => '通过',
        3 => '未通过'
    ];
}