问题描述
我注意到,在链接 skip()
的Laravel中,您还必须使用 take()
作为好。我想跳过第n行,但要休息。 take方法只允许整数如何做到这一点,而不需要采取一些黑客技巧,例如指定一个大数量的代价?
I've noticed that in Laravel when chaining a skip()
you must also use take()
as well. I want to skip the first n rows but take the rest. The take method only allows integers how can I do this without resorting to some hacky trick such as specifying a large number for take?
推荐答案
基本上,对于每个OFFSET,必须提供一个LIMIT才能使mysql工作。因此,没有办法做到这一点没有限制。我们需要一些php mojo在这里工作。
Basically, with every OFFSET, a LIMIT must be supplied for mysql to work. Therefore, there is no way to do this without sepcifying a limit. We need some php mojo to work here.
假设我们有一个名为 Attendance
的雄辩类。这是应该工作的:
Let's say we have an Eloquent Class named Attendance
. Here's what should work:
//Getting count
$count = Attendance::count();
$skip = 5;
$limit = $count - $skip; // the limit
$collection = Attendance::skip($skip)->take($limit)->get();
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