[hibernate-issues] [JIRA] (HHH-16298) Failure merging a referenced entity

Davide D'Alto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYzg5N2VkNTFk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16298?atlOrigin=eyJpIjoiYzg5N2... ) HHH-16298 ( https://hibernate.atlassian.net/browse/HHH-16298?atlOrigin=eyJpIjoiYzg5N2... ) Failure merging a referenced entity ( https://hibernate.atlassian.net/browse/HHH-16298?atlOrigin=eyJpIjoiYzg5N2... ) Issue Type: Bug Assignee: Unassigned Created: 14/Mar/2023 03:01 AM Priority: Major Reporter: Davide D'Alto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Given the following association: class Foo { @ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER) @Fetch(FetchMode.JOIN) @JoinColumn(name = "bar_key" , referencedColumnName = "nat_key" ) Bar bar; } class Bar { @Id @GeneratedValue long id; @Column(name = "nat_key" , unique = true ) String key; } Trying to merge a reference association is not going to work (throws an error about id not found). Example: @Test public void testMergeReference(SessionFactoryScope scope) { Bar bar = new Bar( "unique3" ); scope.inTransaction( session -> { session.persist( bar ); } ); scope.inTransaction( session -> { Foo merged = session.merge( new Foo( session.getReference( Bar.class, bar.getId() ) ) ); Assertions.assertThat( merged.getBar().getKey() ).isEqualTo( bar.getKey() ); } ); } See test case: https://github.com/hibernate/hibernate-orm/pull/6239/files ( https://github.com/hibernate/hibernate-orm/pull/6239/files ) ( https://hibernate.atlassian.net/browse/HHH-16298#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16298#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100217- sha1:7167dc8 )