persist « Entity « JPA Q&A





1. Problem when persisting Entity    stackoverflow.com

@Entity
@Table(name = "jobitems")
@IdClass(JobItemId.class)
public class JobItem implements Serializable {

 @ManyToOne
 @PrimaryKeyJoinColumn(name = "forumId")
 private Forum forum;

 @ManyToOne
 @PrimaryKeyJoinColumn(name = "parsingJobId")
 private ParsingJob parsingJob;

 @Id
 @Column(name = "forumId", insertable = false, updatable = ...

2. separating JPA entities from Hibernate-specific tweaks    stackoverflow.com

I have the following "root" entity (hibernate-specific parts commented out):

@Entity
//@GenericGenerator(name="system-uuid",strategy="org.hibernate.id.UUIDGenerator")
public class Node extends PersistentEntity {
    private UUID id;
    private String name;
    private ...

3. exclude @Entity from persistence    stackoverflow.com

I am using persistence.xml in hibernate However, I am some @Entity in the classpath which I don't them to be part of persistence.xml. in the documentation

class The class element specifies a ...

4. Cant persist an entity    stackoverflow.com

I use JPA 2.0 for my project. I delete and entity and then try to persist same data but it throws : org.hibernate.ObjectDeletedException: deleted instance passed to merge . Below is what I ...

5. JPA Entity Persisting another entity    stackoverflow.com

I have a "sale" entity, before the entity is persisted, I'd like to create an "Income" entity. I could do this in a session bean but I'd like it better if ...

6. New entity in a set is not persisted    stackoverflow.com

JPA + Hibernate I'm using this code to create a new AvatarAttributeOwnership (AAO) and assign it to a Player. However, the new AAO is not persisted to the database.

    ...

7. Problem Persisting Entity In Hibernate    coderanch.com

Hi All, I have been facing a very typical problem since the past 7-8 hours. I have been trying to persist an entity instance using hibernate. The entity maps to a database table whose columns have a 'not null' constraint. I initialize all the instance variables of the entity before calling the persist method. I have a @PrePersist, and @PostPersist method ...

8. Theorical problem (entity being persisted twice)    forum.hibernate.org

Author Message luiz.filipe.abrahao Post subject: Theorical problem (entity being persisted twice) Posted: Mon Dec 07, 2009 10:18 am Newbie Joined: Tue Jun 23, 2009 7:59 am Posts: 6 Hi! I'm confused and I think I'm missing some concept. The sort version: The entity is persisted twice if I call childEntityDAO.makePersistent(e). The long version: I have 2 entities, Company and ...

9. Adding new entities to the persistence unit    forum.hibernate.org

Hey guys, Im working on a project using hibernate with JPA that needs to make custom entities. The code of those entities is on a db and I have already compiled and loaded them. But now I need to add them to the persistence unit at runtime. They are in a folder mapped in the persitance.xml (folder ) I thought the ...





10. Persisting new entities only if modified    forum.hibernate.org

I have a scenario where objects are created, and should be persisted only if they are modified later on. I could track which objects were created that way myself, but hey, Hibernate is keeping track of the dirty status for me, so I should be able to leverage that dirty checking to drive the decision which newly-created object belongs to the ...

11. em.persist and not fully initialized entity    forum.hibernate.org

Hi, I am using Hibernate 3.6.5 I would like to be able to mark an entity as being managed in the course of a transaction at any time and regardless of the state of the entity. My problem is that em.persist(x) could not be called if x has non null fields which are not set (yet) Code: org.hibernate.PropertyValueException: not-null property references ...

12. synchronize persistent entities    forum.hibernate.org

hi, I have following problem to solve: we have a server with persistent objects managed with hibernate. ids are generated from hibernate (uuid) and every object has a timestamp column. our application have to run on a client who connects at startup to the server, read data from the server, store these data to the local database with the same structure ...

13. Many one-to-one on the same persistent entity    forum.hibernate.org

I persisting a graph with Hibernate 2.1. I have few objects that need to belong to only one of many objects at a time. In other words: A (1) ---- (1) C OR B (1) ---- (1) C If casacading is needed this will behave like: A (1) ---- (1) C (1) ---- (1) B meaning that C will belong to ...

14. How to get the state of persistent entities ?    forum.hibernate.org

we use DAO pattern to hide persistence service (Hibernate API) calls. In our standard BusinessDAODefaultImpl we have two methods : - delete(Business) - synchronize(Business) (which means save or update) We have one DAO class for one Business class. A PersistenceService interface is used to hide Hibernate. Excerpt of synchronize method : Transaction transaction = null; /* Interception */ prepareSynchronization(business); try { ...

15. Mixing Hibernate persistence with CMP 2.0 entity persistence    forum.hibernate.org

Is this possible? Not recommended? Stupid? I have a legacy EJB 2.0 app with about 50 CMP 2.0 entity beans. I would like to bolt on some Hibernate POJOs on the object graph. Can this be done or should I just stick with the CMP 2.0 beans and the messy DTOs? Comments/suggestions welcome. Thanks, Joe

16. How to persist Entity with assocation to persisted Entity    forum.hibernate.org

@Entity @Table(name = "VIOLATION") public final class Violation { @ManyToOne @ForeignKey(name = "FK_VIOLATION_TRANSACTION") @JoinColumn(name = "TRANSACTION_ID") private Transaction transaction; @ManyToOne(cascade = { CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH }, fetch = FetchType.EAGER) @ForeignKey(name = "FK_VIOLATION_OBJECT_REF", inverseName = "FK_OBJECT_REF_VIOLATION") ...





17. interesting entity persistence behavior    forum.hibernate.org

Page 1 of 1 [ 2 posts ] Previous topic | Next topic Author Message srinivasa.mettu Post subject: interesting entity persistence behavior Posted: Thu Jun 19, 2008 9:54 am Newbie Joined: Thu Jun 19, 2008 8:57 am Posts: 2 Hi here is scenario i am running into: During hibernate flush, Hibernate ...

18. persisting entities in a loop with FlushModeType.MANUAL    forum.hibernate.org

Hibernate version: 3.2.4.sp1.cp04 Is it possible to do the following in Hibernate/JPA/Seam? Say you have a for loop in which records are persisted to the db table based on user data (e.g. multiple serial number fields) entered in a JSF form submission. Assum that the first n entities are persisted successfully to the PC using EntityManager or Session interface. Then there ...

19. JPA Entity Not Persisted    forums.oracle.com

Actually I was relying on previous experience with JPA 1 where it automatically auto commits by default and as such no transaction handling is needed (no begin/commit) in the code. However with JPA 2 I was thrown off with the changed auto commit behavior where it is off by default. Another thing that I should have looked at closely was the ...