Postgres JSON querying - match all pairs, ignore order - json

Question

I have a Postgres table that contains a jsonb column, the data in which is arbitrarily deep.
id | jsonb_data
---|----------------------
1 | '{"a":1}'
2 | '{"a":1,"b":2}'
3 | '{"a":1,"b":2,"c":{"d":4}}'
Given a JSON object in my WHERE clause, I want to find the rows that contain objects that contain the same data and no more, but in any order. Including, preferably, nested objects.
SELECT * FROM table
WHERE json_match_ignore_order(jsonb_data, '{"b":2,"a":1}');
id | jsonb_data
---|-----------
2 | '{"a":1,"b":2}'
This would essentially work identically to the following Ruby code, but I'd really like to do it in the database if possible.
table.select { |row| row.jsonb_data_as_a_hash == {b: 2, a: 1} }
How can I do this?

Answer 1

With jsonb type you can use equal sign even for values with nested objects.
Thus the following will also work:
create table jsonb_table(
id serial primary key,
jsonb_data jsonb
);
insert into jsonb_table(jsonb_data)
values
('{"a":1}'),
('{"a":{"c":5},"b":2}'),
('{"a":{"c":5},"b":2,"c":{"d":4}}');
select * from jsonb_table
where jsonb_data = '{"b":2,"a":{"c":5}}'::jsonb;
You will get rows with objects containing same keys with same values recursively (in this case only the second row).