php - 如何使用 Laravel 4.2 批量删除数据库表中不在数组中的行

Question

我想删除表中不在数组中的行。在以下示例中，这将批量删除与 $cards_to_delete 对应的行。

$cards_to_delete = array(1, 2, 3);
Collection::where('username', '=', $username)
    ->whereIn('id', $cards_to_delete)
    ->delete();

我怎样才能删除数组中不存在的所有内容？大致如下:

$cards_to_keep = array(1, 2, 3);
Collection::where('username', '=', $username)
    ->whereIn('id', '!=', $cards_to_keep)
    ->delete();

Answer 1

Laravel 还提供了 ->whereNotIn() 方法:

$cards_to_keep = array(1, 2, 3);
Collection::where('username', '=', $username)
    ->whereNotIn('id', $cards_to_keep)
    ->delete();