如何使用 Laravel 4.2 批量删除数据库 table 中不在数组中的行

Question

我想删除 table 中不在数组中的行。在下面的示例中，这将批量删除对应于 $cards_to_delete.

的行

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

我怎样才能删除不在数组中的所有内容？沿着这些线的东西：

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

Answer 1

Laravel 也提供了 ->whereNotIn() 方法：

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

How to mass delete rows in database table that are NOT in array using Laravel 4.2