How do you validate uniqueness of a pair of ids in Ruby on Rails?

If you needed to include another column (or more), you can add that to the scope as well. Example.

I'm late to the game here, but this might help a Googler one day.

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.