[SQLObject] Hi guys. Please, I need help

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I´d like to put in one table two references do a same table. Does 
sqlObject allows that? Or may i build the sql in another way to
make that works? db_login has the names and db_request has 2 fields that 
point to db_login( these fields are the persons id ).Thanks in advance.

The tables:

CREATE TABLE db_login (
    id             SERIAL   PRIMARY KEY,
    login          TEXT     NOT NULL,
    password       TEXT     NOT NULL,
    ativo          BOOLEAN  DEFAULT true,
    name           TEXT
);

CREATE TABLE db_request (
    id             SERIAL      PRIMARY KEY,
    new_file       BOOLEAN     DEFAULT true,
    db_request_id  INTEGER     NOT NULL REFERENCES db_login (id),
    db_source_id   INTEGER     NOT NULL REFERENCES db_login (id),
    ts             TIMESTAMP   NOT NULL DEFAULT CURRENT_TIMESTAMP
);