machines_no_locker = database.session.query(database.Machine).join(Locker, database.Machine.owner == Locker.name).filter(Locker.type == None).all()
machines_err_locker = database.session.query(database.Machine, Locker.message).join(Locker, database.Machine.owner == Locker.name).filter(Locker.type == 'ERR').all()
machines_no_locker = database.session.query(database.Machine).join(Locker, database.Machine.owner == Locker.name).filter(Locker.type == None).all()
machines_err_locker = database.session.query(database.Machine, Locker.message).join(Locker, database.Machine.owner == Locker.name).filter(Locker.type == 'ERR').all()