Question

class User < ActiveRecord::Base
  has_many :posts
end

class Post < ActiveRecord::Base
  belongs_to :user
end

In irb:

> u = User.first
 => #<xxxxx>
> u.posts.class
 => Array

My env:

$ruby -v
ruby 1.9.2p312 
$rails --version
--version
Rails 3.1.0

I remember that almost all relation query return an ActiveRecord::Relation in rails3;

What is wrong?

ps: I need to get the “klass” from the ActiveRecord::Relation object;

Answer 1

davidb is correct about the has_many, but I assume you want the class without hitting the db. Use this:

User.first.posts.proxy_reflection.klass

(Disclaimer: Uses internal ActiveRecord methods and probably won’t work if Post uses STI)