Q. There are a couple of errors with this Ruby code. What are they?
users = User.where(active: true)
Post = [ ]
users.each do |user|
Post

Question

Q. There are a couple of errors with this Ruby code. What are they? 
users = User.where(active: true)
Post = [ ]
users.each do |user|
  Post << user.posts
end

Anónimo · Accepted Answer

A. The interviewer said that the only problem was that there are actually a million users and it's not optimized. The answer the interviewer provided:
posts = Post.joins(:user).where(active: true)
users = User.where(active: true).includes(:posts)

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