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ActiveRecord "find" doesn't accept a :distinct parameter

#6210

When using AR's find method, there's no provision for passing a :distinct option.

Let's say I have a table "Messages", with a column "author_id". I'd like to be able to perform the following query :
SELECT DISTINCT author FROM messages;

I think it would be pretty sweet to be able to do something along the lines of
Message.find(:all, :distinct => :author)

So basically, here are my question :

  • Would that be a good idea ? I guess not, otherwise I assume it would have been done already...
  • If it is, I'd be glad to contribute a patch. Any hints about the proper way to implement that ?

Reported by Romain · December 22nd, 2010 @ 05:45 PM

State: stale
Milestone: none
Assigned to: nobody
Importance: none

Activity

  1. Oriol Gual
    Oriol Gual

    In the meantime you could use something like this:

    Message.group(:sponsors).all

    Although is not the same

    December 27th, 2010 @ 03:51 PM

  2. rails
    rails
    • State changed from new to open

    This issue has been automatically marked as stale because it has not been commented on for at least three months.

    The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.

    Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.

    March 28th, 2011 @ 01:00 AM

  3. rails
    rails
    • State changed from open to stale

    March 28th, 2011 @ 01:00 AM