How to use in Ruby 2.1.1 user defined type postgresql?

Question

ruby

how to call the following postgresql stored procedure, using bind variables in ruby

create or replace function el_folder_save
(
  i_privacy_list	el_privacy_type[]
) ...

CREATE TYPE el_privacy_type AS
(
  profile_id    bigint,
  privacy_type  smallint
);

Answer 1

a year later, I'll answer myself :) you need to use json, this will solve the problem of transferring complex data, postgresql from 9.4 works very well with json.
Oftop . and yes instead of RoR, I chose django in python there is an option to use custom types to pass to postgresql