Orl/app/Models/EcManagement/ProductManagement.php

<?php

namespace App\Models\EcManagement;

use Illuminate\Database\Eloquent\Model;

class ProductManagement extends Model
{
    protected $connection = 'mysql';                         // 參照 config/database.php 的連線名稱
    protected $table      = 'ecManagement_productManagement'; // 表名需符合命名規範
    protected $primaryKey = 'serno';                            // PK 的欄位名稱
    public    $timestamps = false;                           // 保持 false
}