Record not inserted while using #ManyToOne mapping - spring

Question

I have 2 tables 'orders' and 'orderlines' and used bidirectional OneToMany mapping.When i save the order, record is successfully inserted into table 'orders'.But my 'orderlines' table is empty.No record is inserted.
This is the save operation code in Controller.
#RequestMapping(value = "ordersuccess", method = RequestMethod.POST)
public String processOrder(#ModelAttribute("order") Order order,
#ModelAttribute("cart") Cart cart,
BindingResult result) {
if (!result.hasErrors()) {
Set<OrderLine> orderLines = new HashSet<OrderLine>();
for(CartLine c : cart.getCartLines()) {
OrderLine line = new OrderLine();
line.setOrder(order);
line.setProduct(c.getProduct());
line.setProductPrice(c.getProduct().getPrice());
line.setTotalPrice(c.getPrice());
orderLines.add(line);
order.setOrderLines(orderLines);
}
orderService.save(order);
orderLineService.save(orderLine);
}
return "ordersuccess";
}
Can someone point me what wrong i am doing.
EDIT:
OrderLine.java
public class OrderLine {
#Id
#GeneratedValue
#Column(name="orderline_id")
private int orderline_id;
#ManyToOne
#JoinColumn(name = "order_id")
private Order order;
#ManyToOne(targetEntity = Product.class,
cascade = CascadeType.ALL,
fetch = FetchType.LAZY)
#JoinTable(
name="products",
joinColumns=#JoinColumn(name="product_id")
)
private Product product;
)
Order.java
public class Order {
#Id
#GeneratedValue
#Column(name="id")
private int id;
#OneToMany(mappedBy = "order")
private Set<OrderLine> orderLines;
//getter/setter

Answer 1

The orderLines object is created:
Set<OrderLine> orderLines = new HashSet<OrderLine>();
You then add lines to it:
orderLines.add(line);
But it never attributed to an order or sent to the service layer.
Also the OrderLine.product mapping should be like this
public class OrderLine {
#Id
#GeneratedValue
#Column(name="orderline_id")
private int orderline_id;
#ManyToOne
#JoinColumn(name = "order_id")
private Order order;
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "product_id")
private Product product;
}
and Order.orderLines should have a cascade:
public class Order {
#Id
#GeneratedValue
#Column(name="id")
private int id;
#OneToMany(mappedBy = "order", cascade = CascadeType.ALL)
private Set<OrderLine> orderLines;
}
You then need to save the orderLines:
order.setOrderLines(orderLines);
and save the order:
orderService.save(order);
When order is saved it will cascade the orderlines and the associated product too.
If you have bidirectional associations don't forget to set both sides.