Hibernate throws Cannot delete or update a parent row: a foreign key constraint fails

Question

I am working on a basic example to test cascade delete operation but I am getting exception.

I have below entities:

Employee.java

Answer 1

When you delete Employee on session try to add this, I had the same issue:

session.delete(session.get(Employee.class, employee_Id));

On my issue I had Movie and TimeTable relation was OneToOne:

On Movie model:

public class Movie implements Serializable
{
   @Id
   @Column(name = "fid")
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private int fid;
   ....
    @OneToOne(mappedBy = "movie", cascade = CascadeType.ALL, orphanRemoval = true)
    private TimeTable timetable;
}

On TimeTable model:

public class TimeTable implements Serializable 
{
   ...
    @OneToOne
    @JoinColumn(name = "fid")
    private Movie movie;
}

Answer 2

The REMOVE cascade type is for the standard JPA remove() operation. For the native Hibernate delete() operation, you need to use a Hibernate-proprietary annotation:

@Cascade(CascadeType.DELETE)