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count (and other calculations) do not consider scoped :group option

#6124

In Rails 2.3.x calculation methods do not counts scoped :group parameter.

Given model like

class Reply < ActiveRecord::Base
  named_scope :group_by_topic_id, :group => 'replies.topic_id'
end

I've got following results in console

ree-1.8.7-2010.02 > Reply.count(:group=>'replies.topic_id')
  SQL (0.8ms)   SELECT count(*) AS count_all, replies.topic_id AS replies_topic_id FROM "replies" GROUP BY replies.topic_id 
 => #<OrderedHash {1=>2, 2=>1, 4=>3}> 
ree-1.8.7-2010.02 > Reply.group_by_topic_id.count
  SQL (0.5ms)   SELECT count(*) AS count_all FROM "replies" 
 => 6 
ree-1.8.7-2010.02 > Reply.instance_exec do with_scope(:find=>{:group=>'replies.topic_id'}) do count end end
  SQL (0.5ms)   SELECT count(*) AS count_all FROM "replies" 
 => 6

I think it is wrong and it differs from Rails3 behaviour.

calculate_scope_group.diff 2.73 KB

Reported by Sokolov Yura · December 7th, 2010 @ 10:38 AM

Activity

rails
- Tag changed from 2.3.x 2.3.10, activerecord scopes to 23x 2310, activerecord scopes
- 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.

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March 8th, 2011 @ 12:00 AM
rails
- State changed from open to stale
March 8th, 2011 @ 12:00 AM