[GENERAL] Is there a way to address all elements of JSON array when creating a constraint in PosgreSQL?

[Maciej Szopinski]

Hello,

Does PostgreSQL provide any notation/method for putting a constraint on
each element of a JSON array?

An example to illustrate:

create table orders(data json);

insert into orders values ('
{
    "order_id": 45,
    "products": [
        {
            "product_id": 1,
            "name": "Book"
        },
        {
            "product_id": 2,
            "name": "Painting"
        }
    ]
}
');

I can easily add a constraint on the order_id field:

alter table orders add check ((data->>'order_id')::integer >= 1);

Now I need to do the same with product_id. I can put constraint on
idividual array items:

alter table orders add check ((data->'products'->0->>'product_id')::integer
>= 1);
alter table orders add check ((data->'products'->1->>'product_id')::integer
>= 1);
-- etc.

So what I'm looking for is some kind of wildcard operator for matching any
JSON array element:

alter table orders add check ((data->'products'->*->>'product_id')::integer
>= 1);
--                                               ^ like this

I know that this can be done by extracting products to a separate table
with a foreign key to orders. But I want to know if this is possible within
single JSON column, so I can keep that in mind when designing a database
schema.