About remove

manual

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. ...

 
api-jpa

remove(entity)

Remove the entity instance.(Method of javax.persistence.EntityManager)

 
manual

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. ...

 
manual

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. ...

 
issue

Removing of an entity removes also another entity type

Hello, we have following case: ToleranceDefinition and ResolverMapping are entities and have not any relations each other. Before start transaction the ToleranceDefinition entities exist already in the database. ... entity is removed from database by entitymanager.remove(obj). Directly after remove we try to retrieve again the ResolverMapping entities from database and ...

 
issue

Schema-Update: Deactivation of automatic entity class removing and introduction of a new class remove in the schema config

Hello, in our application we use ObjectDB in embedded mode as part of the Profile that can be stored and opened by our customers. Our application is an eclipse RCP application with a domain-driven design. The product can be installed in different configurations (in other words with more or less PlugIns). This presents us with further challenges when we have made changes to DB schema for new versions. ... because we thought that the instances are removed if we remove the entity class. In the past we made a small check. We created ... currently support removing a class. You can remove all the objects of a class from the database, of course. If you ...

 
manual

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 ...

 
forum_thread

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 ...

 
api-jpa

CascadeType.REMOVE

Cascade remove operation(Enum Constant of javax.persistence.CascadeType)

 
forum_thread

Remove a modified entity cause an optimistic lock exception

Hello, the following examples load and modify an entity, and load and remove the same entity. The first example 'SetAndRemoveIssue.java' is a simple java program which executes without errors. The second example is an OSGi program which fails with an optimistic lock exception. Both examples are equivalent, please execute SetAndRemoveIssue.java (in the OSGi example as a plugin-test). Can you explain the optimistic lock exception? ... following examples load and modify an entity, and load and remove the same entity. The first example ... minimum that can still show the unexpected behaviour (i.e. remove unnecessary bundles, entity classes, JPA wrappers, etc.) ... the following console application includes flush before remove and throws an OptimisticLockException . Please confirm that it is ...