I.NFECTIO.US: ActiveRecord Calculations

ActiveRecord Calculations

Bob Silva — Sun, 05 Nov 2006 12:38:00 -0800

I've been wanting to modify the ActiveRecord Calculations module to support multiple aggregate calculations in one query for awhile now. My current project with lots of graphing finally gave me the motivation to do it. Refer to the patch for details and feel free to comment on it.

# Calculate different aggregate functions at once
min, max = Person.calculate(:min, :age, :max, :age)

# Specify the column aliases so you can order by it
views, replies = Posts.sum({:views => 'number_of_views'}, :replies, :order => "number_of_views desc")

Multiple Calculations Patch

"ActiveRecord Calculations" by Eric

Thu, 01 Mar 2007 04:22:26 -0800

Hi! Is this still possible to use this patch with Rails 1.2?

"ActiveRecord Calculations" by Bill Shobe

Wed, 13 Dec 2006 10:30:46 -0800

I would love to try this. How do I use the .diff file? Thanks.

"ActiveRecord Calculations" by Bob Silva

Sun, 05 Nov 2006 19:40:59 -0800

I use the Ruby bindings with ASE ChartDirector at http://www.advsofteng.com/

"ActiveRecord Calculations" by Mike Sax

Sun, 05 Nov 2006 16:46:45 -0800

Hi Bob, very cooll... so what are you using for graphing? Gruff? I'll have to do graphing pretty soon and it doesn't like there are many options out there.