1. accessing a parent field from a bag's where clause forum.hibernate.org |
2. Using Bags for performance adding in Collections forum.hibernate.orgHello, I need a solution to insert an element to a Collection without loading the whole elements of that Collection before inserting. With a ManyToMany relation between UserGroups and Roles given, i want to add a Role to a UserGroup like usergroup.getRoles().add(role). However, Hibernate initializes the Collection before adding the element (reason). A solution ought to be using a Bag instead ... |
3. @ManyToOne x 2 = "cannot fetch simultaneous bags" forum.hibernate.orgHi all, I know that one has to use Set or annotations when a JPA entity has two or more collections or @OneToMany relationships to get the collections to populate on eager loading. However I am getting this error on one of my entities that has two @ManyToOne relationships. It has worked without problems for hundreds of other entity classes that ... |
4. Bag or set? which one is the best? forum.hibernate.orgHi there, I've been using bags for a while, but recently I make use of sets. I've seen some differences but I really would like to hear the advice from an expert: which one is best, bag or set? performance, scalability, etc.? I know that when using sets I must implement equals and hashcode, which leads to the "object id vs ... |