In the following example, I have a one-to-one relationship. I do not use mappedBy because the Item class can be in 2 different columns of the container class.
When I persist the container class, the Item's container_id is always NULL. Even if I persist the Container class, start a new transaction load the container, and then set and merge the Item with the managed container, the item's container_id is always NULL.
The only way I can get the container_id set is to create a new entity manager, load the Container, set the item's container, and then merge the item. This only works in a new entity manager, not the one used to persist the Container, and that seems to be inconsistent.
{code:java}
@Entity
public class MyContainer {
@OneToOne(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER)
@JoinColumn(name = "item_good_id")
Item goodItem;
@OneToOne(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER)
@JoinColumn(name = "item_bad_id")
Item badItem;
}
@Entity
public class Item {
@OneToOne
@JoinColumn(name = "container_id")
MyContainer myContainer;
}
{code}
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