About removed
Deleting JPA Entity Objects
Explains how to use JPA to delete (remove) entity objects from the database.... setting, when an Employee instance is removed the operation is automatically cascaded to the referenced Address instance, which is then automatically removed as well. Cascading may continue recursively when applicable (e.g. to ... to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those ...
Working with JPA Entity Objects
Explains the entity object lifecycle and the persistence context.... of entity objects consists of four states: New, Managed, Removed and Detached. When an entity object is initially ... The entity object changes its state from Managed to Removed , and is physically deleted from the database during commit. More ...
CRUD Database Operations with JPA
Shows how to use Java/JPA to store, retrieve, update & delete. Given an EntityManager javax.persistence.EntityManager JPA interface Interface used to interact with the persistence context. See JavaDoc Reference Page... , em , that represents a JPA connection to the object dat ...
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). ... (within one transaction!) then the Address entity is yet removed from the database, eventhough it has never been deleted from the ...
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; } ... } Now consider a number of OtherEntities are removed from the database. What happens with the numerous TreeSets for all the ... that are referenced in a TreeSet automatically removed as well, so, the TreeSet is reduced in size? Or do I end up having a ...
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 ... #1 2011-06-08 14:02 Hi all, I'm testing ObjectDB for my project, but I have troubles with it. At this time I'm not ab ...
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; .. } #1 2011-06-08 21:33 Dear all, I have entities Invoice and InvoiceItem, their relation is defined: public class ...
