Activeadmin: Collection not working on filter

Question

I am working on activeadmin filters. I have one filter which is not working. The filter:

filter :role, as: :select, collection: Common::User::ROLES

The scoped collection:

def scoped_collection
  Common::User.where(role: Common::User::ROLES)
end

Roles are mentioned in the user.rb file:

ROLES = [ ADMIN, CUSTOMER, SYSTEM, LEAD]

But on using this filter I am getting the following error:

ActionView::Template::Error (undefined method `klass' for nil:NilClass):
    1: insert_tag renderer_for(:index)

Do anyone have any idea why this filter is not working?

EDIT: I have noticed that the select filter with option equals is not working and the same filter with other options like contains, starts_with, ends_with is working.

Answer 1

The filter seems to be expecting an ActiveRecord relation since it's an association.

You can perhaps use the code you have in scoped_collection in the filter, and then get rid of the scoped_collection?

filter :role, as: :select, collection: Common::User.where(role: Common::User::ROLES)

Answer 2

Super late, but have you tried passing it as a proc?

filter :role, as: :select, collection: proc { Common::User::ROLES }