How to get list of controllers and actions in ruby on rails?

Question

In rails, I can get the name of the current controller via controller_name and the current action by calling action_name. I am looking for similar runtime reflection for fet

Answer 1

I had a similar problem; in my case it was for writing controller tests. There are certain basic tests that I want to run on every action for certain controllers (e.g., return 401 if the user is not logged in). The problem with the action_methods solution is that it picks up all methods on the controller class, even if the method does not have a corresponding route in config/routes.rb.

Here's what I ended up doing:

def actions_for_controller(controller_path)
  route_defaults = Rails.application.routes.routes.map(&:defaults)
  route_defaults = route_defaults.select { |x| x[:controller] == controller_path }
  route_defaults.map { |x| x[:action] }.uniq
end

So if you wanted a list of actions for PostsController, you'd say:

actions_for_controller('posts')

And you would get:

['show', 'create', 'edit', 'destroy'] (or whatever)

If you wanted a list of all controllers, something like this should do it:

def controllers_list
  route_defaults = Rails.application.routes.routes.map(&:defaults)
  files = route_defaults.map { |x| "#{x[:controller]}_controller" }.uniq
  files -= ['_controller']
  files.map { |x| x.split('/').map(&:camelize).join('::').constantize }
end