class ActiveAdmin::Inputs::FilterSelectInput

def extra_input_html_options
  {}
end

def input_name
  "#{super}_eq"
end

def input_options
  super.merge(:include_blank => I18n.t('active_admin.any'))
end

def method
  if super.to_s.scan(/_id/).count('_id') == 1
    super.to_s.sub(/_id$/, '').to_sym
  else
    super.to_s.to_sym
  end
end