Why does Hibernate try to delete when I try to update/insert?

Question

In my app I have these Hibernate-mapped types (general case):

class RoleRule {
  private Role role;
  private PermissionAwareEntity entity; // hibernate-mapp         


        

Answer 1

Brian Deterling's answer helped me to overcome the phantom delete. I wish he had put a real code. Here is what I got from his suggestion 1. Posting for someone to use it or to comment my code.

// snFile and task share many to many relationship

@PersistenceContext
private EntityManager em;

public SnFile merge(SnFile snFile) {
        log.debug("Request to merge SnFile : {}", snFile);

        Set tasks = taskService.findBySnFilesId(snFile.getId());
        if(snFile.getTasks() != null) {
            snFile.getTasks().clear();
        }
        em.merge(snFile);
        em.flush();
        if(tasks != null) {
            if(snFile.getTasks() != null)
                snFile.getTasks().addAll(tasks);
            else
                snFile.setTasks(tasks);
        }

        return em.merge(snFile);
    }