Unique commenters on an article

Ruby on Rails
1

I have an Article which has_many :comments, and Comment belongs_to :article and :user. I was wondering what the most efficient Arel query would be to get the unique users who commented on a given article.

Thanks!

1 Like
2

This StackOverflow post seems to answer this question well: ruby on rails - How to fetch distinct values with arel/relational algebra and has_many :through - Stack Overflow