JPA with JTA: Persist entity and merge cascaded child entities

Question

I have a bidirectional one-to-many relationship with the following entity classes:

0 or 1 client <-> 0 or more product orders

When persis

Answer 1

@SputNick ,I solved it by the steps described below.I am going to use your code snippet to demonstrate what I did,

You have Client entity -@OneToMany and ProductOrder entity -@ManyToOne .I will use

// Called when pressing "save" on the "edit..." 
public void edit(T entity) {
 getEntityManager().merge(entity);}

for persistence as it can give me flexibility to save as well as update.

To create Client and corresponding Product orders use

client.set..(some property to be saved);

productOrder.set..(some property to be saved);

//Set productOrder for the client

List order = new ArrayList<>();

client.setOrders(order); //Note that this expects a list to be passed

//set client for the productOrder

productOrder.setClient(productOrder);

.edit(client) or .edit(productOrder)

Note that either way will be able to update both entity tables with your changes.

Though late,hope it will help someone