Arbre duplicates form fields when inspecting model during production/debug

[gbisheimer]

Description

I came across this problem when building this activeadmin addon aiming to customize default ActiveAdmin layout by using CaptureHelper methods.

I'm getting repeated form fields when inspecting or evaluating arbre components related to forms. I didn't had problems with anything else but forms. Seems related to Arbre but couldn't find the bug yet.

Versions

activeadmin 1.0.0.pre4
rails 5.0.0.1.
ruby 2.3.0p0

Steps to reproduce

Take any ActiveAdmin resource that has a form declaration in its DSL and add a puts self.inspect before closing the block. You will get the form fields duplicated.

Example

I'll use the default admin_user Resource as an example:

ActiveAdmin.register AdminUser do
  permit_params :email, :password, :password_confirmation

  index do
    selectable_column
    id_column
    column :email
    column :current_sign_in_at
    column :sign_in_count
    column :created_at
    actions
  end

  filter :email
  filter :current_sign_in_at
  filter :sign_in_count
  filter :created_at

  form do |f|
    f.inputs "Admin Details" do
      f.input :email
      f.input :password
      f.input :password_confirmation
    end
    f.actions
    puts self.inspect
  end

end

Go to the edit or new route and you will get something like this:

[timoschilling]

Thats a Arbre issue not a ActiveAdmin one

[gbisheimer]

That's correct, but it affects Active Admin as it is a required dependency. I will move the issue to Arbre repository. Thanks!