Ruby on Rails

On Apr 29, 2010, at 2:01 PM, Robert Walker wrote:

> David Zhu wrote:
>> Is it possible to do a find all, and then return the # of items?
>
> Better to use the built-in aggregate functions.
>
> http://railsapi.com/doc/rails-v2.3.5/classes/ActiveRecord/Calculations/ClassMethods.html#M001357
>
> This will perform the count in SQL and will be much more efficient
> than
> building all those ActiveRecord objects.

+1, but if you already have them you can use .size() to get the count.

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