test/app/Http/Models/ProjectInfo.php

<?php

namespace App\Http\Models;

use Illuminate\Database\Eloquent\Model;

class ProjectInfo extends Model
{
    protected $table = 'protects_info';
    protected $primaryKey = 'project_id';
    protected $incrementing = false;

    protected $casts = [
        'head_pay' => 'array',
        'done_pay' => 'array',
        'done_pay' => 'array',
    ];
}