Hibernate - Mapping only id not entire entity with foreign key constraint

Question

Hi want to create a foreign key association/constraint but only map the primary key, not the entire entity. So what I want to achieve is something like this (which creates the correct db schema but fails on save):

@Entity(name = "journal")
public class JournalEntry {
    @Id
    private UUID id;
  
    @ManyToOne(targetEntity = User.class, optional=false)
    @JoinColumn(name="id")
    private UUID userId;

    @Column
    private String text
}

In case the above is not possible, how can I manually specify that a foreign key constraint should be created?

This question did get asked quite a lot a few years ago but there was never a satisfactory answer and I thought maybe something changed in the last 8-12 years.

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