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Method Missing

Dynamic Method Handling in Ruby

The method_missing hook allows you to handle calls to undefined methods. It's perfect for creating dynamic APIs and implementing flexible interfaces.

class User
  def method_missing(method_name, *args)
    if method_name.to_s.start_with?('find_by_')
      attribute = method_name.to_s.split('find_by_').last
      where(attribute => args.first)
    else
      super
    end
  end
end

# Now you can do:
User.find_by_name("John")

Great for creating dynamic finders, API wrappers, and configuration objects. Remember to implement respond_to_missing? and always call super for unhandled methods.

#ruby #metaprogramming #methods

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