PostgreSQL JOIN with array type with array elements order, how to implement?

Question

I have two tables in database:

CREATE TABLE items(
 id SERIAL PRIMARY KEY,
 ... some other fields
);

This table contains come data row with

Answer 1

select distinct on (some_chosen_data_in_order.id)
  some_chosen_data_in_order.*,
   array_to_json( array_agg(row_to_json( items))
  over ( partition by some_chosen_data_in_order.id ))
from some_chosen_data_in_order
  left join items on items.id = any (some_chosen_data_in_order.id_items)