rails group by multiple columns

Question

i have budgets table with emptype_id and calendar_id actual_head, estimated_head

when i do Budgets.sum(:actual_head ,:group=>\"emptype_id,calendar_id\")

Answer 1

I'm not sure of this, buy try :group => [:emptype_id, :calendar_id]

Answer 2

I cheat. Do :group => ["emptype_id,calendar_id"].

Not want you nor I want, but this works at least.

Answer 3

Grouping with multiple columns cannot be supported by rails. You have to use a regular find all:

budgets = Budgets.find(:all, 
                       :select => "emptype_id, calendar_id, sum(budgets.actual_head) AS sum_actual_head", 
                       :group => "emptype_id, calendar_id")

budgets.each { |budget| puts budget.sum_actual_head }