t_nine/app/Model/ProductActivity.php

<?php

namespace App\Model;

class ProductActivity extends UseScopeBaseModel
{
    protected $table = "product_activity"; //指定表
    const CREATED_AT = 'crt_time';
    const UPDATED_AT = 'upd_time';
    protected $dateFormat = 'U';
    const range_function = '';
}