[LRUG] Strange AR scope behaviour

[Ed James (Alt)]

Hi all 

I have a class like this (simplified of course):

    class FileDownload < ActiveRecord::Base
      scope :status, -> { select('guid, status') }
    end

I'm using this scope in a controller to return a json response. This worked just fine in Rails 3.2.14. The response looked like this:

    [{ "user_id": 1234 }]

After upgrading to Rails 4, suddenly the response looks like this:

    [{ "user_id": 1234, "id": null }]

I've also tried this on the console, and it's the same.

Rails 3.2:


Rails 4:


Can anyone explain why the null id field is being added?

Thanks.

-- 
Ed James
Sent with Sparrow (http://www.sparrowmailapp.com/?sig)

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