module ActiveAdmin::Filters::FormtasticAddons

def column_for(method)
  @object.base.columns_hash[method.to_s] if @object.base.respond_to?(:columns_hash)
end

def foreign_key?(method)
  @object.base.reflections.select{ |_,r| r.macro == :belongs_to }.values
    .map(&:foreign_key).include? method.to_s
end

def humanized_method_name
  if object.base.respond_to?(:human_attribute_name)
    object.base.human_attribute_name(method)
  else
    method.to_s.send(builder.label_str_method)
  end
end

def polymorphic_foreign_type?(method)
  type = Rails::VERSION::MAJOR == 3 && Rails::VERSION::MINOR == 0 ? proc{ |r| r.options[:foreign_type] } : :foreign_type
  @object.base.reflections.values.select{ |r| r.macro == :belongs_to && r.options[:polymorphic] }
    .map(&type).include? method.to_s
end

def reflection_for(method)
  @object.base.reflect_on_association(method) if @object.base.respond_to?(:reflect_on_association)
end