Error on show view

[iduuck]

Hi there, I got a problem when developing with activeadmin-mongoid. So, everythings fine, but now I wanted to create a new Booking (my model name) and then I got the following error:

[:_id] is not a symbol

I tried to edit, that the _id should not be shown on the show page, but it also does not help.

The entire trace:

/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/view_helpers/display_helper.rb:8:in `block in <module:DisplayHelper>'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/view_helpers/method_or_proc_helper.rb:86:in `instance_exec'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/view_helpers/method_or_proc_helper.rb:86:in `render_in_context'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/view_helpers/display_helper.rb:18:in `display_name'
arbre (1.0.1) lib/arbre/element.rb:175:in `method_missing'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/views/pages/show.rb:36:in `default_title'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/views/pages/show.rb:14:in `title'
/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/views/pages/base.rb:25:in `block in build_active_admin_head'
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/Users/dschmidt/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/active_admin-fdc6a3d9faee/lib/active_admin/views/pages/base.rb:9:in `build'
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[oliviermilla]

@iDuuck did you find a fix for this? I'm hitting the same thing here.

[max-konin]

@iDuuck try to add following to initializer

module ActiveAdmin
  module ViewHelpers
    module DisplayHelper
      const_set :DISPLAY_NAME_FALLBACK, ->{
        name, klass = "", self.class
        name << klass.model_name.human         if klass.respond_to? :model_name
        name.present? ? name : to_s
      }
    end
  end
end