java - Hibernate foreign key is null in OrderItem (order_orderID) -

i have 2 table orders , orderitem below:

@entity @table(name = "orders") public class order implements serializable {  @id @generatedvalue private integer orderid; @column(nullable = false) private date orderdate; @manytoone(cascade = cascadetype.all) private user user;  @onetomany(cascade = cascadetype.all) private set<orderitem> orderitems = new hashset<orderitem>();  public order() { }  public order(date ordate, user currentuser) {     this.orderdate = ordate;     this.user = currentuser; }  public set<orderitem> getorderitems() {     return orderitems; }  public void setorderitems(set<orderitem> orderitems) {     this.orderitems = orderitems; }  //getter/setters orderdate, user 

and

@entity public class orderitem implements serializable {  @id @generatedvalue private integer id; @manytoone(cascade = cascadetype.all) private book book; // f.k book table @column(nullable = false) private int quantity; @column(nullable = false) private double totalprice;  public orderitem() {} public orderitem( book currentbook, int qty, double totalprice) {     this.book = currentbook;     this.quantity = qty;     this.totalprice = totalprice; } //getter/setters 

and here initialize them store in database:

@transactional public void storeorderindb() {      order = new order(currentdate(), currentuser); //date,user     orderservice.addorder(order);      orderitem orderitem = new orderitem();     orderitem.setbook(currentbook);     orderitem.setquantity(qty);     orderitem.settotalprice(gettotalcost(qty, unitprice));      orderitemservice.addorderitem(orderitem); } 

this result:

orders:

orderid: 5, orderdate: "2015-04-25 23:11:16", userid: 1

orderitem:

id:2 , quantity:1 , totalprice:5000 , bookid:5 , order_orderid: null

why order-orderid null?

i need not null.

in order entity have declared

@onetomany(cascade = cascadetype.all) private set<orderitem> orderitems = new hashset<orderitem>(); 

above declaration says foreign-key maintain order entity , resolve problem

@transactional public void storeorderindb() {  order order = new order(currentdate(), currentuser); //date,user  orderitem orderitem = new orderitem(); orderitem.setbook(currentbook); orderitem.setquantity(qty); orderitem.settotalprice(gettotalcost(qty, unitprice)); //orderitemservice.addorderitem(orderitem); set<orderitem> orderitemset=order.getorderitems(); orderitemset.add(orderitem); order.setorderitems(orderitemset); orderservice.addorder(order); } 

hope resolve problem thanks!