Paper_trail and Rails_admin on rails 5

[Adeering]

When I try to add history to my admin I get the following error:
undefined method 'version_class_name' for #<Class:0x0056249a09f190>

I have the two gems install (remotipart and rails_admin >= 1.0.0.rc) and in my rails_admin.rb file I put in this:

RailsAdmin.config do |config|

  ### Popular gems integration

  ## == Devise ==
  config.authenticate_with do
    warden.authenticate! scope: :user
  end
  config.current_user_method(&:current_user)

  ## == Cancan ==
  # config.authorize_with :cancan

  ## == Pundit ==
  # config.authorize_with :pundit

  ## == PaperTrail ==
  config.audit_with :paper_trail, 'User', 'PaperTrail::Version' # PaperTrail >= 3.0.0

  ### More at https://github.com/sferik/rails_admin/wiki/Base-configuration

  ## == Gravatar integration ==
  ## To disable Gravatar integration in Navigation Bar set to false
  # config.show_gravatar true

  config.actions do
    dashboard                     # mandatory
    index                         # mandatory
    new
    export
    bulk_delete
    show
    edit
    delete
    show_in_app

    ## With an audit adapter, you can add:
    history_index
    history_show
  end
end

Ive tested the paper_trail versions in the console and everything works fine. I have added the object_changes column per the instructions also.

[dgobaud]

having this problem too :( anyone?

[lazebny]

I had the same issue, my conditions:

before:

class User; end
class General::User < ::User; has_paper_trail end

after:

class User; has_paper_trail end
class General::User < ::User; end

It was resolved after adding has_paper_trail to User model.

[chabgood]

If this is not an problem anymore, please close this issue.

[mshibuya]

Closed by #2865.