How to delete data from org.hibernate.collection.PersistentBag? | Hibernate (Jpa)

问题

The List<String> Mylist is org.hibernate.collection.PersistentBag...

and i want to delete this Mylist...
How i can do it??

QriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
CriteriaQuery<A_entity> criteriaQuery = criteriaBuilder.createQuery(A_entity.class);
criteriaQuery.from(A_entity.class);
Query query = em.createQuery(criteriaQuery);
List<A_entity> queryList = query.getResultList();
for (A_entity a:queryList)
{
   if(....)
   {
     List<String> Mylist = a.func();
     ???How delete Mylist????
   }
}

Thank you very much!!

回答1:

Try deleting elements one by one:

List<String> Mylist = a.getMyList();
em.getTransaction().begin();
for (String element:Mylist){
    em.remove(element);
}
em.getTransaction().commit();

_______________________
The Solution (Work to me, thank to "Genzotto"):

List<String> Mylist = a.getMyList();
listStirng.clear();
em.getTransaction().begin();
     for (String str : Mylist) {
         em.merge(str);
     }
em.getTransaction().commit();

来源：https://stackoverflow.com/questions/23920323/how-to-delete-data-from-org-hibernate-collection-persistentbag-hibernate-jpa