module Polyamorous::JoinAssociationExtensions

def initialize(reflection, children, polymorphic_class = nil, join_type = Arel::Nodes::InnerJoin)
  @join_type = join_type
  if polymorphic_class && ::ActiveRecord::Base > polymorphic_class
    swapping_reflection_klass(reflection, polymorphic_class) do |reflection|
      super(reflection, children)
      self.reflection.options[:polymorphic] = true
    end
  else
    super(reflection, children)
  end
end