Redmine

It seems that files under plugins/plugin_name/helpers ignored by Rails completely.

To check this, just create some SettingsHelper module in file names settings_helper.rb in some plugin folder:

module SettingsHelper
  def get_text
    "Plugin description" 
  end
end

Next, create file in app/views/settings/ named _some_plugin_settings.html.erb with following content:

<fieldset class="box tabular">
  <p>
    <%= get_text %>
  </p>
</fieldset>

Then add settings property to plugin init.rb file:

settings(:partial => 'settings/some_plugin_settings')

Now, when you try to configure plugin you will get undefined method (get_text) error.