QSqlQuery query(m_Db);
if(!query.prepare("INSERT INTO group_hosts (group_id, host_id) VALUES( :group, :host )")) {
    processSqlError(query);
    m_Db.rollback();
    return;
}
query.bindValue(":group", groupID);
query.bindValue(":host", id);
if(!query.exec()) {
    processSqlError(query);
    m_Db.rollback();
    return;
}