JPA Mapping OneToMany with partial embedded id child - spring-data-jpa

Question

Simple example (hopefully). I have a primary key (using a sequence) in one table and that value is a partial FK into a child table. I see the Parent is trying to be saved with a generated sequence, but then I see an exception that the parentId in the embeddable is null while saving the child. The sequence value used for the parent is not being carried over to the child. I have tried many annotations and mappedBy/join column names but no luck.
Any pointers would be very much appreciated.
public class Parent {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "audit_seq")
#SequenceGenerator(name = "audit_seq", allocationSize = 5)
private Long id;
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "parent")
private List<Child> childList = new ArrayList<>();
//Used to add child record o the parent
public void addChild(Child child) {
this.childList .add(child);
child.setParent(this);
}
}
#Embeddable
public class ChildId {
private Long parentId;
private String name;
}
public class Child {
#EmbeddedId
private ChildId id;
private String myCol;
#ManyToOne(fetch=FetchType.LAZY)
#JoinColumn(name = "parentId", insertable = false, updatable = false)
private Parent parent;
}

Answer 1

I was able to get this resolved with the use of a couple of annotations:
Parent class:
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "parent", orphanRemoval = true)
#PrimaryKeyJoinColumn
private List<Child> childList = new ArrayList<>();
Child class:
#ManyToOne
#MapsId("id")
#JoinColumn(name = "id")
private Parent parent;
Now all objects are being persisted when saving the parent with the appropiate sequence id.