Get all associated records in filters

[fnicastri]

Hi,
I'm hitting a wall with the filters.

I have two models and the relative rails_admin conf:

class ImageBase < ApplicationRecord
  has_and_belongs_to_many :authors, optional: true
  [...]
end

class Author < ApplicationRecord
  has_and_belongs_to_many :image_bases, class_name: 'ImageBase'
  [...]
end

config.model 'ImageBase' do
    list do
      scopes [:published, :draft, nil]
      filters %i[collocazione authors]
      [...]
      field :authors do # (4)
        eager_load true
        queryable true
        visible true
        searchable %i[name surname]
      end
      search_by :search_image_base_admin
    end
end

My problem is that when I filter the ImageBase by Author in Rails_admin the results only show the matching Author and not all the authors related to the imagebase record.

I need this mainly to export the data after the filtering, it is not just an issue in the listing view (I can live with that)

Can't find a solution in the docs nor on the net,
any suggestion/solution? @sferik

Thanks
Francesco