How to fix the Hibernate “object references an unsaved transient instance - save the transient instance before flushing” error

Question

I receive following error when I save the object using Hibernate

object references an unsaved transient instance - save the transient instance before flushi         


        

Answer 1

My problem was related to @BeforeEach of JUnit. And even if I saved the related entities (in my case @ManyToOne), I got the same error.

The problem is somehow related to the sequence that I have in my parent. If I assign the value to that attribute, the problem is solved.

Ex. If I have the entity Question that can have some categories (one or more) and entity Question has a sequence:

@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "feedbackSeq")
@Id
private Long id;

I have to assign the value question.setId(1L);