linked object not working with postgresql

Hi,

When I want to use the query builder with PostgreSQL, the links between tables are not shown.

There's nothing in the "add linked object".

Is this feature supported for PostgreSQL ? 

FlySpeed Version 3.5.6.1

SQL script for test :

    create table a(id int primary key, v text);
    create table b(fka int references a(id),v2 text);