In Ruby, is there a way to 'override' a constant in a subclass so that inherited methods use the new constant instead of the old?

Question

In Ruby, is there a way to \'override\' a constant in a subclass in such a way that calling an inherited method from the subclass results in that method using the new consta

Answer 1

If you have the luxury of being able to change the base class, consider wrapping the "constants" that need changing in class methods in the base class and overriding them as needed in subclasses. This removes the potential for confusion between parent and subclass constants. For the example, this would be as follows:

class SuperClass
  CONST = "Hello, world!".freeze

  def self.const
    CONST
  end

  def self.say_hello
    const
  end
end

class SubClass < SuperClass
  CONST = "Hello, Bob!".freeze

  def self.const
    CONST
  end
end

SubClass.say_hello #=> "Hello, Bob!