什么是相当于＆QUOT; find_all_by_id＆QUOT;在轨道4 [英] what is the equivalent of "find_all_by_id" in rails 4

问题描述

我有，我想从数据库中找到各自的记录，采用主动记录查询ID数组。例如：的id = [2，3，1]

I have an array of ids that I want to find their respective records from the database, using active record query. e.g: ids = [2, 3, 1]

现在，对我来说，找到其ID是其中的一个阵列中，在低版本的Rails的特定型号的所有记录，我想我可以做这样的事情：

now, for me to find all records of a particular model whose id is one of those in the array, In lower versions of rails, I guess I can do something like:

Model.find_all_by_id([2, 3, 1])

但根据这个帖子，

These methods were deprecated on 4.0 and removed at 4.1. If you want to
keep sing then you need to include this gem
https://github.com/rails/activerecord-deprecated_finders

我的问题是有没有办法，我可以在rails4.2做到这一点，而不必包括宝石？

My question is that is there no way I can do this in rails4.2 without necessarily having to include a gem?

感谢。

推荐答案

直接更换的 find_by 。您可以使用它，如：

The direct replacement is find_by. You can use it like:

Model.find_by(id: [2, 3, 1])

这是真的去precated是有方法的名称的属性部分的唯一的事。

The only thing that is really deprecated is having the attribute part of the method name.

在code是非常相似的href="https://github.com/rails/activerecord-de$p$pcated_finders" rel="nofollow">提出的替代的 Model.where（编号：[2，3，1），你可以看到：

The code is very similar to the proposed alternative of Model.where(id: [2, 3, 1]) as you can see:

def find_by(*args)
  where(*args).take
end

请注意，建议（现已删除） Model.find（[2，3，1）是不可以相同，那么将抛出一个异常，如果阵列中的任何入侵检测系统是不存在的。

Please note that the suggested (now deleted) Model.find([2, 3, 1]) is not equivalent, it will throw an exception if any ids in the array do not exist.

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