Rails: trouble including modules via a plugin

I'm trying to create a rails plugin and the problem I'm facing is that the app won't include my modules when migrating the plugin.

Here's what I have so far:

1. A file lib/patch/settings_helper_patch.rb with extension code

2. An init.rb file with require_dependency 'patch/settings_helper_patch'

3. Some code in settings_helper_patch.rb which is as follows:

module ValidateIssuePatch
  module Patch
    module SettingsHelperPatch
      def self.included(base)
        base.send(:include, InstanceMethods)
      end

      module InstanceMethods
        def issue_options
          #some code here
        end
      end
    end
  end
end

unless SettingsHelper.included_modules.include?(ValidateIssuePatch::Patch::SettingsHelperPatch)
  SettingsHelper.send(:include, ValidateIssuePatch::Patch::SettingsHelperPatch)
end

After I migrate the plugin, I wish to use the issue_options method, but I get undefined local variable or method error.

If I run SettingsHelper.included_modules.include?(ValidateIssuePatch::Patch::SettingsHelperPatch) from the console, I get uninitialized constant Patch::SettingsHelperPatch.

However, if I call ValidateIssuePatch from the console, I get => ValidateIssuePatch in response.

Can anyone tell me what is the magic I'm missing here?