JSON foreign keys in PostgreSQL

Question

Is it possible to assign a foreign key to a json property in PostgreSQL? Here is an example what I would like to achieve, but it doesn\'t work:

CREATE TABLE User         


        

Answer 1

The foreign key parameter must be a column name:

http://www.postgresql.org/docs/current/static/sql-createtable.html

You will have to normalize

create table user_data (
    id int not null primary key,
    user_id int not null,
    somedata text,
    constraint fk_users_data foreign key (user_id) references Users(Id)
);