轨道：记录没有被标识在Heroku的有序 [英] Rails: Records are not ordered by id in heroku

问题描述

林有一个问题，我开发我的应用程序在我当地的环境，一切都会按espected，但在我部署到Heroku的东西是不工作的权利。

Im having a problem I developed my app in my local environment and everything works as espected, but after I deployed to heroku something is not working right.

我有2个型号PurchasingGroup和GroupGoal

I have 2 models PurchasingGroup and GroupGoal

一个采购团有许多组的目标，以及当我创建集团目标为采购团，我可以检查在这样的控制台

a purchasing group has many group goals, well when I create group goals for a purchasing group I can check in the console like this

PurchasingGroup.last.group_goals

和结果是这样的一个

[#<GroupGoal id: 130, created_at: "2015-03-25 17:09:08", updated_at: "2015-03-25 17:10:37", other attributes ommitted>, 
#<GroupGoal id: 131, created_at: "2015-03-25 17:09:08", updated_at: "2015-03-25 17:18:11", other attributtes ommitted]>

嗯，这是正确的，它的工作原理一样，在Heroku和我的地方太多，当一个小组的目标是更新的记录的顺序改变的Heroku（仅在Heroku上），这样的结果是这样的

well this is right, it works like that in heroku and in my local too, when a group goal is updated the order of the records change in heroku (ONLY in heroku) so the result is like this

[#<GroupGoal id: 131, created_at: "2015-03-25 17:09:08", updated_at: "2015-03-25 17:10:37", other attributes ommitted>, 
#<GroupGoal id: 130, created_at: "2015-03-25 17:09:08", updated_at: "2015-03-25 17:18:11", other attributtes ommitted]>

所以如果你看到现在的顺序改变，这打破了很多我的应用程序的功能，所以我必须指定每次像这样

so if you see now the order changed, and this breaks a lot of functionality of my application so I have to specify EVERYTIME like this

PurchasingGroup.last.group_goals.order（：ID）

我必须通过指定的顺序：ID，以使其在Heroku的工作。知道为什么吗？

I have to specify order by :id in order to make it work in heroku. Any idea why?

推荐答案

假设你正在使用Postgres的瓦特/ Heroku的，各种各样的Postgres的通过最近更新的。你必须覆盖默认顺序模型作为的has_many：group_goals，：为了=＆GT; ID DESC，或你有什么

Assuming you are using postgres w/Heroku, postgres sorts by the most recently updated. You'll have to override the default order in your model as in has_many: group_goals, :order => "id DESC", or what have you

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