Rails Arel selecting distinct columns?

This is not that elegant in most SQL implementations. One way is to first get the list of the five most recent comments grouped by topic_id. Then get the comments.

Created_at by sub selecting with the IN clause.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.