From: Ed Hames <ehames@...>
Date: 2008-01-19T03:14:57+09:00
Subject: Parent class cannot call child class method

Hi guys,

I have the following design which is not working as I would like it
to:

class A
  def bar
    raise "Base class can't do bar!"
  end

  def foo
    bar
  end
end

class B < A
  def bar
    puts "B doing bar"
  end

  def foo
    puts "B does this first"
    super
  end
end

If I do B.new.foo I get an exception because Base class can't do bar
which is understandable. However, I want B#bar to be called. What
would be the proper way to solve this problem?

Thanks in advance,
Edgardo