About remove
Deleting JPA Entity Objects
Explains how to use JPA to delete (remove) entity objects from the database.... from the database either explicitly by invoking the remove remove(entity) EntityManager's method Remove the entity instance. ...
Working with JPA Entity Objects
Explains the entity object lifecycle and the persistence context.... for deletion, by using the EntityManager’s remove remove(entity) EntityManager's method Remove the entity instance. ...
CRUD Database Operations with JPA
Shows how to use Java/JPA to store, retrieve, update & delete.... a managed object (usually by retrieval) and invoke the remove remove(entity) EntityManager's method Remove the entity instance. ...
CRUD Operations with JPA
Explains how to use JPA for CRUD database operations (persist, retrieve, update, remove). The following subsections explain how to use JPA for CRUD database operations: Storing JPA Entity Objects Retrieving JPA Entity Objects Updating JPA Entity Objects Deleting JPA Entity Objects ...
Issue with cascade delete & add/remove
Hi, Please see the attached sample project (important: classes need to be enhanced as done in the pom.xml file). ... need to clear the collection first, commit that and then remove the Contact? thanks! ... . get ( 0 ) ; // Remove and add address again -> will be gone contact. getAddresses ( ) . remove ( address_1 ) ; contact. getAddresses ...
Removing objects where ManyToMany relationships exist
Consider you have an entity Entity with the following unidirectional relationship: @ManyToMany private Set<OtherEntity> setOfOtherEntities; public Set<OtherEntity> getOtherEntities() { if (setOfOtherEntities == null) { setOfOtherEntities = new TreeSet<OtherEntity>(); } return setOfOtherEntities; } ... where an entry points to an to-be-removed OtherEntity, to remove it from the Set manually? Hope not... Thanks for your help! ... OtherEntity object is deleted the application must also remove any references to it, including from the setOfOtherEntities ...
Removing an entity throws exception
Hi all, I'm testing ObjectDB for my project, but I have troubles with it. At this time I'm not able to remove customer entity, when it's read by a query (it's attached), it throws this exception: Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: com.objectdb.o._RollbackException: Failed to commit transaction: 51 ... ... I have troubles with it. At this time I'm not able to remove customer entity, when it's read by a query (it's attached), it ... is the entity detached (why?). When I merge it, I can remove it without problems... The Customer class code: @ ...
OrphanRemoval not working?
Dear all, I have entities Invoice and InvoiceItem, their relation is defined: public class Invoice implements Serializable { .. @OneToMany(mappedBy = "invoice", fetch= FetchType.EAGER, orphanRemoval=true, cascade= CascadeType.ALL) private List<InvoiceItem> invoiceItemList; .. } ... on the owner side, but in the case of orphan removal the remove operation has to be done on the owned (mapped by) side to have effect ...
