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能够积极记录:注销“周围的强奸”,以便归还所有记录?
原标题:Can ActiveRecord s :offset "wrap around", so that all records are returned?

我的考察使用了<代码>:offset 备选办法(say, :offset => 50),使用该研究的网页则被粉碎。 因此,第1页的登记号为51。

问题在于,头50个记录从来都无法显示,因为看上去看不出“四舍五入”。 也就是说,如果记录总数为200个,而I do :offset => 50,则从调查中收集的记录不包括1-50。 是否有办法指导“周围的强奸”调查,以便包括所有200份记录——但命令它们从第51号记录开始吗?

最佳回答

犯罪仅限于限制选择哪些记录;因此,如果你想要一切,你就不应使用。 如果您的页数为50个,而且你可以完全按顺序进行记录(也许不是长期的良好假设),你可以具体指出:

Model.order( id < 50, id )

如果你在任何时候重载这些记录,如果数据集仍然可以管理,则将保存记录进行轮换可能会有问题:

Model.all.rotate(50)
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