Is there a way to get a collection of all the Mode

Question

Is there a way that you can get a collection of all of the Models in your Rails app?

Basically, can I do the likes of: -

Models.each do |model|
  puts model.class.name
end

Answer 1

In just one line:

 ActiveRecord::Base.subclasses.map(&:name)

Answer 2

Module.constants.select { |c| (eval c).is_a?(Class) && (eval c) < ActiveRecord::Base }

Answer 3

I've tried so many of these answers unsuccessfully in Rails 4 (wow they changed a thing or two for god sakes) I decided to add my own. The ones that called ActiveRecord::Base.connection and pulled the table names worked but didn't get the result I wanted because I've hidden some models (in a folder inside of app/models/) that I didn't want to delete:

def list_models
  Dir.glob("#{Rails.root}/app/models/*.rb").map{|x| x.split("/").last.split(".").first.camelize}
end

I put that in an initializer and can call it from anywhere. Prevents unnecessary mouse-usage.