In Ruby, inside a class method, is self the class or an instance?

I know that self is the instance inside of an instance method. So, then, is self the class inside of a class method? E.g., Will the following work in Rails?

class Post < ActiveRecord::Base
  def self.cool_post


That is correct. self inside a class method is the class itself. (And also inside the class definition, such as the self in def self.coolpost.)

You can easily test these tidbits with irb:

class Foo
    puts self.inspect
end  # => Foo

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