Document adding view helpers

[crystalneth]

Could someone in-the-know please add to the documentation the proper way to add helper methods to views.

There are many proposed solutions out there on SO and elsewhere, none of which seem to work reliably in different cases and across AA versions.

For instance, let's say I want to add a method link_to_if_authorized to use in index and show pages. What is the right way to do this? I have tried a number of methods.

  index do
    column :slug do |plan|
      link_to_if_authorized [:edit, plan], plan.slug, edit_admin_plan_path(plan)
    end

[timoschilling]

Using helpers in AA works out of the box:

module ApplicationHelper
  def foo(string)
    "foo: #{string}"
  end
end

  index do
    column :test do |object|
      foo object.name
    end
  end

renders a column with 'foo: bar' for example.

There are two possible sources for your problem:

1. You have configured config.action_controller.include_all_helpers = false:
   1. Don't do it!
   2. You need to include the helper by hand:
      1. Include it in the ActiveAdmin::BaseController, I prefer a initializer with ActiveAdmin::BaseController.class_eval { helper ApplicationHelper }.
      2. Use controller { helper ApplicationHelper } in the related ActiveAdmin resource definition
2. You ran into ApplicationController and Helpers are not being reloaded in Dev Env #697, if yes you need to restart your dev server each time you change a helper