Merge RailsAdmin config

[sepastian]

I am developing a gem that installs RailsAdmin into a main application. The gem defines a document type (models) with basic attributes and RailsAdmin configuration. Other (yet to be developed) gems may define additional document types, such as invoice, order, ... - that require different attributes and, consequently, different RailsAdmin configuration.

The basic document type comes as a module, additional document types include the basic document type. If calling rails_admin do ... end multiple times, both in the module and the actual document class, configuration options will be overwritten. How can I merge different RailsAdmin configurations?

I need to be able to to this, for example:

module Base
  extend ActiveSupport::Concern
  included do
    rails_admin do
      parent Document
    end
  end
end

class Invoice
  include Base
  rails_admin do
    navigation_icon 'icon-file'
  end
end

After that, Invoice should have Document defined as its parent in RailsAdmin.

Can RailsAdmin do this? If not, how would I go about implementing this in RailsAdmin in a smart way and without reinventing the wheel?

Thanks...

PS This has been asked before, but never answered.

[ehoch]

Our hacked solution:

https://gist.github.com/ehoch/6826660

[sepastian]

Thanks a lot Eric, looking good.

I am preparing a pull request containing small modifications to RailsAdmin::Config::LazyModel and RailsAdmin::Config. Will probably post it here later today.

[sepastian]

Pull request #1781

[mshibuya]

#2670 made it possible.