PostgreSQL array of elements that each are a foreign key

Question

I am attempting to create a DB for my app and one thing I\'d like to find the best way of doing is creating a one-to-many relationship between my Users and

Answer 1

No, this is not possible.

PostgreSQL is a relational DBMS, operating most efficiently on properly normalized data models. Arrays are - by definition, they are ordered sets - not relational data structures and the SQL standard therefore does not support defining foreign keys on array elements, and neither does PostgreSQL.

You can, however, build a perfectly fine database with array elements linking to primary keys in other tables. Those array elements, however, can not be declared to be foreign keys and the DBMS will therefore not maintain referential integrity.