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Selective merge/cascade of detatched entity

Company. Each salesman is given many numerical targets for the new company. I then need to merge each ... ); for (Salesman s : salesmen) em.merge(s); This appears to have the effect of checking and merging ... objects attached to each Salesman, and each Salesman has hundreds of targets for each Company, this merge

Merge Issue: Attempt to reuse an existing primary key value

a feature on an ordinary merge operation. This is the test case ( work in 2.4.6 version ) : 2 parents ... ");         EntityManager em = null ;         // Merge parent1         em = emf ... ("child1"));         em.merge(e1);         em.getTransaction().commit();         em.clear

Extra uninitialised entities spawned on merge()

_MERGE = true;     /**      * @param args the command line arguments      */     public static ... );                 if (DO_PERSIST_BEFORE_MERGE) {             em.getTransaction().begin();             em.persist(e ... ();         em.merge(root);         em.getTransaction().commit();         TypedQuery<Element> query = em

Merge on detached entities

Hello, it is possible to merge detached entities? There are some attached entities which load from ... the fields of the detached entities will be changed and a merge by em.merge(entity) will be saved the entities. Can this works correctly? How are the rules of the merge process? Do the changed fields

Cascading merge() leading to "Attempt to persist a reference to a non managed instance" error

with a parent/child relationship and cascading merge() operations. The parent has an application defined id ... ();     tx.begin();     em.merge(new Child(new Parent("Joe")));     em.merge(new Child(new Parent("Tim ... . Cascading merge to new entity objects (the Parent instances in your code) is currently broken

EntityManager.merge gives EntityNotFoundException

Just started using objectdb (2.3.4). Calling EntityManager.merge for a new (non-managed) object ... .EntityNotFoundException Entity is not found: classdb.Test#'id' (error 631) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:456) at classdb.Test.main(Test.java:32) thepigs Matt Pepar You are right, merging non

NullpointerException when execute a merge

that is persisted with "merge()". Then we want to persist “merge()” an new object of a different type ... .onObjectDBError(OBC.java:1503) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:526) at com.btc.ep.dal ... ) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:523) ... 43 more But if we use enhanced classes


Method javax.persistence.EntityManager T merge( T entity ) Merge the state of the given entity into the current persistence context. Parameters: entity - entity instance Returns: the managed instance that the state was merged to Throws: IllegalArgumentException - if instance is not an entity or


Enum Constant javax.persistence.CascadeType MERGE Cascade merge operation Since: JPA 1.0

Detached Entity Objects

the database unless modified detached objects are merged back into an EntityManager to become managed ... invocation of rollback or by a commit failure. Explicit Merge Detached objects can be attached to any EntityManager by using the merge method: em.merge(employee); The content of the specified

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