class ActiveAdmin::Inputs::Filters::BooleanInput

def include_blank

Provide the AA translation to the blank input field. 
def include_blank
  I18n.t "active_admin.any" if super
end

def input_html_options_name 

def input_html_options_name
  "#{object_name}[#{input_name}]" # was "#{object_name}[#{association_primary_key}]"
end

def input_name 

def input_name
  return method if seems_searchable?
  "#{method}_eq"
end