Comments on: Active Record and the IN clause http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/ Wed, 08 Sep 2010 15:38:28 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Attack of the Sunswirl! » Blog Archive » Using Rails ActiveRecord to Find ‘where in’ a Set http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/#comment-64013 Attack of the Sunswirl! » Blog Archive » Using Rails ActiveRecord to Find ‘where in’ a Set Fri, 16 Nov 2007 04:55:37 +0000 http://www.almosteffortless.com/2007/03/25/active-record-and-the-in-clause/#comment-64013 [...] an invalid query according to MySQL, at least… that’s been my experience in PHP. But I stumbled upon a solution that works quite well (from the [...] [...] an invalid query according to MySQL, at least… that’s been my experience in PHP. But I stumbled upon a solution that works quite well (from the [...]

]]> By: Trevor http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/#comment-40046 Trevor Thu, 10 May 2007 05:35:01 +0000 http://www.almosteffortless.com/2007/03/25/active-record-and-the-in-clause/#comment-40046 Duncan, that's nice to know! Thanks for your comment. Duncan, that’s nice to know! Thanks for your comment.

]]> By: Duncan Beevers http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/#comment-36696 Duncan Beevers Wed, 25 Apr 2007 02:31:00 +0000 http://www.almosteffortless.com/2007/03/25/active-record-and-the-in-clause/#comment-36696 Though currently undocumented, using the hash conditions syntax, you can construct IN clauses by using array values to your condition keys. Topic.find(:all, :conditions => { :forum_id => @forums.map(&:id) }) Check out what you can do with Ranges values too! Pretty neat. Though currently undocumented, using the hash conditions syntax, you can construct IN clauses by using array values to your condition keys.

Topic.find(:all, :conditions => { :forum_id => @forums.map(&:id) })

Check out what you can do with Ranges values too!

Pretty neat.

]]> By: Trevor http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/#comment-32311 Trevor Tue, 03 Apr 2007 22:34:06 +0000 http://www.almosteffortless.com/2007/03/25/active-record-and-the-in-clause/#comment-32311 Thanks for the tip, aaron. You're totally right - I can't believe I forgot about that Rails helper. In any case, I'm sure this collection trick will come in handy sooner or later. Thanks for the tip, aaron. You’re totally right – I can’t believe I forgot about that Rails helper.

In any case, I’m sure this collection trick will come in handy sooner or later.

]]> By: aaron http://trevorturk.com/2007/03/19/active-record-and-the-in-clause/#comment-32237 aaron Tue, 03 Apr 2007 15:34:35 +0000 http://www.almosteffortless.com/2007/03/25/active-record-and-the-in-clause/#comment-32237 would you consider using: category = Category.find(params[:id]) @forums = Forum.find_all_by_category_id(@category.id) @topics = @forums.topics would you consider using:

category = Category.find(params[:id])
@forums = Forum.find_all_by_category_id(@category.id)
@topics = @forums.topics

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