Undefined method 'delegate' for capybara::dsl::module

Question

I have a capybara monkey patch to deal with jquery-ui, which works pretty well running on Ubuntu... although when moving to windows I get the following error (all dependency gems were installed successfully):

Undefined method 'delegate' for capybara::dsl::module

The line of code that this occurs is:

module Capybara::DSL
  delegate :datepick, :datetimepick, :timepick, to: :page
end

any ideas of what this could be? a bit lost of why this error is shown just by switching OS...

Answer 1

In standard ruby delegation is handled by the module Forwardable. You need to require and then extend Forwardable to access these methods like so:

require 'forwardable'
module Capybara::DSL
  extend Forwardable
  #notice syntax is accessor, *methods
  def_delegators :page, :datepick, :datetimepick, :timepick
end

The type of delegation you are trying to use right now is part of active support Module Class. If you would like to use this syntax then do so like this:

require 'active_support/core_ext/module'
module Capybara::DSL
  #active_support syntax allows a to: element in the hash to act as the accessor
  delegate :datepick, :datetimepick, :timepick, to: :page
end