[BUG] Formtastic::UnsupportedEnumCollection

Describe the bug

Since v1.10.0, when I want to display an ActiveAdmin index page containaing a select filter with 'multiple' option enabled, an exception is raised:

Formtastic::UnsupportedEnumCollection

example of input invoking this error:

ActiveAdmin.register User do
filter :role, as: :select, collection: proc { role_options }, multiple: true
end

With previsous version 1.9.0, it works without issue.

Expected behavior A clear and concise description of what you expected to happen.

Screenshots

Additional context

def collection_from_enum?
  klass.respond_to?(:defined_enums) && klass.defined_enums.has_key?(method.to_s)
end

it overrides the one from Formtastic https://github.com/formtastic/formtastic/blob/master/lib/formtastic/inputs/base/collections.rb#L127

def collection_from_enum?
   object.respond_to?(:defined_enums) && object.defined_enums.has_key?(method.to_s)
end

object is a Ransack object without method defined_enums defined. And for this reason, it works:

[124, 133] in /var/home/patrice/.rbenv/versions/3.3.3/lib/ruby/gems/3.3.0/gems/formtastic-5.0.0/lib/formtastic/inputs/base/collections.rb
   124:           end
   125:         end
   126: 
   127:         def collection_from_enum?
   128:           debugger
=> 129:           object.respond_to?(:defined_enums) && object.defined_enums.has_key?(method.to_s)
   130:         end
   131: 
   132:         def collection_for_boolean
   133:           true_text = options[:true] || Formtastic::I18n.t(:yes)
(byebug) object
Ransack::Search<class: Project, base: Grouping <combinator: and>>
(byebug) collection_from_enum? && multiple?
false

But with klass, it's the User class that invoked and it fails:

[1, 10] in /var/home/patrice/.rbenv/versions/3.3.3/lib/ruby/gems/3.3.0/gems/activeadmin_addons-1.10.0/lib/activeadmin_addons/support/select_filter_input_extension.rb
    1: module ActiveAdminAddons
    2:   module SelectFilterInputExtension
    3:     def collection_from_enum?
    4:       debugger
=>  5:       klass.respond_to?(:defined_enums) && klass.defined_enums.has_key?(method.to_s)
    6:     end
    7: 
    8:     def collection
    9:       if !options[:collection] && collection_from_enum?
   10:         EnumUtils.options_for_select(klass, method.to_s, use_db_value: true)
(byebug) klass
User(id: integer,....................)
(byebug) klass.respond_to?(:defined_enums)
true

Why the original method had been overriden ? Especially, why the receiver is the class method and not the object ?

platanus / activeadmin_addons

[BUG] Formtastic::UnsupportedEnumCollection #504