Rails 3 Joins — Select only certain columns

Question

Below is a relationship between Comments and a user. Each comment has one user so I\'m building out a join in the code below.

I was wondering how to build this code

Answer 1

You could use something like this:

@comments = Comment.joins(:user)
                   .select("comments.*, users.first_name")
                   .where(study_id: @study.id)