Can't register Comment model

[meliborn]

The goal is to overwrite some actions of comments_controller. So, I trying this:

ActiveAdmin.register Comment do
  controller do
    # some stuff here
  end
end

and getting uninitialized constant Comment. What the problem is? ActiveAdmin version is 0.6.0

[seanlinsley]

The Comment model created by AA is actually namespaced as ActiveAdmin::Comment in Ruby and as active_admin_comments in the DB. However, AA comments are registered as Comments when it comes to the actual page registration. So in order to customize it, you need to do this:

ActiveAdmin.register ActiveAdmin::Comment, as: 'Comment' do
  # ...
end

To better understand how it all works, check out the source code.

[meliborn]

Namespace, exactly. Thanks!

[seanlinsley]

No problem

[meliborn]

It's strange, but could you explain me why the code in controller part has no effect please?

ActiveAdmin.register ActiveAdmin::Comment do
  menu false

  controller do
    def create
      # Try to raise exception
      creat2e!
      @comment.r
    end
  end
end

[seanlinsley]

You need to specify the :as option or it will register a completely new resource instead of overriding the existing one.

[meliborn]

Like this?

ActiveAdmin.register ActiveAdmin::Comment, as: 'Comment' do
  menu false

  controller do
    def create
      # Try to raise exception
      creat2e!
      @comment.r
    end
  end
end

Done, but nothing changed.

[seanlinsley]

Ah... the problem is we're using the after_load hook, which is run after your app/admin config files are loaded. So in order to override the behavior you have to use the after_load hook yourself:

ActiveAdmin.after_load do
  ActiveAdmin.register ActiveAdmin::Comment, as: 'Comment' do
    controller do
      def create
        raise 'ooooooo'
      end
    end
  end
end

[meliborn]

Works like a charm. Thanks again ;)