返回定制的ActiveRecord的查询中选择 [英] return custom query select in activerecord

问题描述

我有，做一些数学并返回一个计算的自定义选择字段的结果集的查询。我无法弄清楚如何访问，在返回的ActiveRecord的对象。我已经为这还增加了attr_accessor。

I've got a query that does some math and returns a calculated custom select field with the result set. I cannot figure out how to access that in the activerecord object that is returned. I've added an attr_accessor for it also.

attr_accessor :percentage_used

select('gateways.*, (num_transactions_today/ SUM(num_transactions_today)) AS percentage_used ').joins(:gateway_groups).where('map_gateway_groups.gateway_group_id = ?', gateway_group_id)

在结果集中，我希望有机会获得：percentage_used，但它不是在那里。什么我做错了任何想法？我从来没有需要之前做到这一点。

in the result set, I would expect to have access to :percentage_used, but it is not in there. Any ideas on what i'm doing wrong? i've never needed to do this before.

感谢

推荐答案

您可以访问它

object["percentage_used"]

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