CascadeType problem in One to Many Relation
- by Milad.KH
Hi
I have two classes which have a Unidirectional One to Many relation with each other.
public class Offer{
...
@OneToMany(cascade=CascadeType.ALL)
@JoinTable(name = "Offer_Fields",
joinColumns =
@JoinColumn(name = "OFFER_ID"),
inverseJoinColumns =
@JoinColumn(name = "FIELDMAPPER_ID"))
private Set<FieldMapper> fields = new HashSet<FieldMapper>();
}
public class FieldMapper{
...
}
I want to store an Offer with a set of FieldMapper to database.
When I Use CascadeType.ALL in my OneToMany, I got this error:
org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions
and when I change CascadeType to something else I got this error:
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.RCSTT.library.FieldMapper
Thanks for your help.
