inheritance.rb

class TheUppermostClass
  def initialize(one, two, three, four)
  end
end

class TheInheritingClass < TheUppermostClass
  def initialize(one, two, three)
    super(one, two, three, 'four')
  end
end

class TheInheritingClass
  def initialize(*args)
    super
    # You would expect this to call TheInheritingClass#initialize because that's
    # the method we're overriding.
  end
end

TheInheritingClass.new('one', 'two', 'three')

# But the above results in an argument error (3 for 4) because it actually calls
# the superclass, TheUppermostClass.

# How to fix?

super won't call the method your overriding, you'll have to do something like this: https://gist.github.com/729165 :)