resource 路由 访问 show 不显示数据？

Route::resource('bill', 'BillogController');Copy

    public function show(Billog $billog)
    {
        return $billog;
    }

 class Billog extends Model
{
    protected $table = 'billogs';
    protected $primaryKey = 'id';
    。。。
 }Copy

 class Billog extends Model
{
    protected $table = 'billogs';
    protected $primaryKey = 'id';
    。。。
 }Copy