test/app/Http/Models/FlowInfo.php

<?php

namespace App\Http\Models;

use Illuminate\Database\Eloquent\Model;

class FlowInfo extends Model
{
    protected $primaryKey = 'id';
    protected $guarded = [];
    protected $table = 'flow_info';
    public $casts = [
        'detail_list' => 'array'
    ];
}