Grouping by week/month/etc & ActiveRecord?

Question

I\'m doing some statics calculation in my product. A user has performed a number of operations, let\'s say posted comments. I want to be able to show them how many comment

Answer 1

In this case, the best solution for me was to either do it in straight SQL, or to use the Ruby group_by function:

@user.all.group_by{ |u| u.created_at.beginning_of_month }