module Ransack::Nodes::Bindable

def attr
  @attr ||= ransacker ? ransacker.attr_from(self) : context.table_for(parent)[attr_name]
end

def bound?
  attr_name.present? && parent.present?
end

def klass
  @klass ||= context.klassify(parent)
end

def ransacker
  klass._ransackers[attr_name]
end

def reset_binding!
  @parent = @attr_name = @attr = @klass = nil
end