Max wrote:
> I am trying to create a table with an array containing foreign keys.
> I've searched through the documentation and couldn't find a way to do
> so.
>
> Is this something that one can do?
>
> Basically, I have two tables:
>
> create table user (
> user_id serial,
> login varchar(50) primary key,
> tags integer[]-- this is where the problem lies
> );
>
> create table tag (
> tag_id serial,
> name varchar(50) primary key
> );
>
> I would like the user.tags field to be a list of foreign keys (tag_ids
> specifically).
Fortunately, this is not possible.
> I know I can solve my problem with the following table:
>
> create table user_tag (
> user_id integer,
> tag_id integer,
> foreign key (user_id) references table user(user_id) on delete
> cascade,
> foreign key (tag_id) references table tag(tag_id) on delete cascade,
> primary key (user_id,tag_id)
> );
>
> But I would really like to avoid doing that.
Why?
That is the correct and efficient solution of your problem.
Go for it!
Yours,
Laurenz Albe
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