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Deleting JPA Entity Objects

Existing entity objects can be deleted from the database either explicitly by invoking the remove method or implicitly as a result of a cascade operation. Explicit Remove In order to delete ... transaction, it can be deleted using the remove method: Employee employee = em. find (Employee.class, 1

Remove an entity which attributes were changed - OptimisticLockException

and the entity is passed to plugin B. Plugin B changes an attribute on the entity. Plugin C removes ... lock exception of the removed entity. If this operations on the entity are executed in only one plugin ... will be removed , if we use three OSGi plugins. btc_es BTC EmbeddedSystems The difference between using

Is it possible to remove parent/child entities without refresh?

We have a big entity object tree in our project. If I use the entityManager. remove (childEntity) method to remove a child entity a entityManager.refresh(parentEntity) is necessary in order ... . Do you know a way to remove a child entity from a parent entity without a entityManager.refresh

Remove not working

( removed in current transaction) at com.objectdb.o.JPE.g(JPE.java:94) at com.objectdb.o.ERR.f(ERR ... ) at com.objectdb.o.TVS.g(TVS.java:93) at com.objectdb.jpa.EMImpl. remove (EMImpl.java:464) Newest version ... ;     em. remove (byName);     } The unit retrieval works

remove & persist in same transaction => Attempt to reuse an existing primary key value

(another table). On this point we get no conflicts. If we remove additional data for Entity (B) and then the special Entity (A) is empty, we remove the special Entity (A). If we add additional data for Entity ... the same transaction: first remove additional Data - The special Entity (with id 1) is empty and we remove

Removing objects where ManyToMany relationships exist

are removed from the database. What happens with the numerous TreeSets for all the existing Entities in the database? Are OtherEntities that are referenced in a TreeSet automatically removed as ... where an entry points to an to-be- removed OtherEntity, to remove it from the Set manually? Hope not

Entity not removed 100%

When I remove an object from a class it get's removed but the other objects that had that object ... .ALL) This is what it remains when I check the removed object from another object's attributes     Unknown unknown It is the application responsibility to clear references to removed objects. Cascading removal

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 ... ;OSGi test case to the minimum that can still show the unexpected behaviour (i.e. remove unnecessary ... the object. Flushing changes to the database (by running a query in FlushModeType.AUTO ?) Removing

Record is not clearing properly on remove

;but when i delete Agent ,it is removed from db but in AgentGroup it is not removed properly. Agent ... ; Thanks Manoj Manoj Kumar Maharana You have to remove it from the collection and then delete ... the removed object after it is removed from the database (a refresh may be needed). support Support

removed objects stay with null field values in the reference

; ... @OneToMany(fetch=FetchType.LAZY) public Set workflow = new HashSet (); When we remove an object ... . remove   hgzwicker Hans-Georg Zwicker You have to  remove the object from the set  ... the set from the database, even if the object is not removed from the set explicitly. support Support

Attempt to remove a detached entity object (error 613)

wanted to merge it ... Unfortunatly, i get this error : Failed to commit transaction: Attempt to remove ... to remove the object ... ? In my opinion, one child ( a list ) with OneToMany and orphanRemoval has been modified ( one element removed ). And objectdb maybe tries to remove the object ... But i

Removing an entity throws exception

able to remove customer entity, when it's read by a query (it's attached), it throws this exception ... is the entity detached (why?). When I merge it, I can remove it without problems... The Customer class ... ").getResultList(); Code for removing :     em.getTransaction().begin();    

removing members in existing databases

Hi team i might ask for the best practice to remove some members (i.e. collections) in existing ... and let it remain in database 2. Remove the list and   2.a update every object that contains this (now removed ) list   2.b compute a database defragmentation with String[] args = {old_db

DELETE Queries in JPA/JPQL

: Retrieving the entity objects into an EntityManager . Removing these objects from the EntityManager  within an active transaction, either explicitly by calling the  remove method or implicitly ... the database, but when executed, delete specified entity objects from the database. Removing entity objects

Schema-Update: Rename superclass and remove one subclass

Hello, we renamed a superclass and removed one of the subclass. If we then try to open ... to RenamedSuperClass and Remove the ChildClassB.   @Entity @Access(AccessType.FIELD) public ... a super class and removing one of its subclasses at the same time. This report was moved to the issue

can removing an entity throw an exception if the entity is in use?

; // set of A's Set untyped; // general collection that may include A's } Objectdb allows me to remove ... and try to reference the A, I get an EntityNotFoundException. Is there a way to prevent the removal of the A, if it is referenced by any other object in the database? (ie. EntityManager. remove

Removing an element from an @OneToMany doesn't work

private Parent parent; Somewhere I do this: parent.getChildren(). remove (0); manager.merge(parent ... isn't removed . Should I remove the children entity too? It works using EntityManagerFactory

javax.persistence.CascadeType.REMOVE

JPA Enum Constant in javax.persistence.CascadeType REMOVE Cascade remove operation Since: JPA 1.0

EntityManager.remove(entity) - JPA Method

JPA Method in javax.persistence.EntityManager void remove (   Object entity ) Remove the entity instance. Parameters: entity - entity instance Throws: IllegalArgumentException - if the instance is not an entity or is a detached entity TransactionRequiredException - if invoked

Removing entity class

into 10 entities limit. My question is: Is it possible to remove entity/table completely from ... Milan mimac Milan Fabian Unfortunately removing a class is currently unsupported

How to Remove records from many to many relationship tables in JPA

= entityManager.find(Conclusion.class, id); entityManager.getTransaction().begin(); entityManager. remove ... = {CascadeType.PERSIST, CascadeType. REMOVE }) @Cascade(org.hibernate.annotations.CascadeType.DELETE

The exception "Attempt to remove a detached entity object" have no information about the entity

Hello, the exception "Attempt to remove a detached entity object" have no information about the detached entity. It is very hard, especially if the involved entities uses cascading, to find the removed call for the detached entity.   It would be very helpful if you can add a few information

Working with JPA Entity Objects

: New, Managed, Removed and Detached. When an entity object is initially created its state is New ... the EntityManager’s remove method within an active transaction. The entity object changes its state from Managed to Removed , and is physically deleted from the database during commit. More details on object

Shared (L2) Entity Cache

= cache. contains (MyEntity.class, Long.valueOf(id)); Cached entity objects can be removed from the cache by one of the evict methods: // Remove a specific entity object from the shared cache: cache. evict (MyEntity.class, Long.valueOf(id)); // Remove all the instances of a specific class from the cache

Strings in JPQL and Criteria Queries

Characters The TRIM([[LEADING|TRAILING|BOTH] [char] FROM] str) function returns a string after removing ... to ' UK' . TRIM(BOTH FROM ' UK ') is evaluated to 'UK' . By default, space characters are removed

Database Schema Evolution

Modifications to entity classes that do not change their persistent field definitions (their schema) are transparent to ObjectDB. This includes adding, removing and modifying constructors, methods ... the hierarchy, removing an intermediate class in the hierarchy, etc.). Convertible Types When an old

JPA Lifecycle Events

). @PreRemove - when an entity is marked for removal in the EntityManager. @PostRemove

Database Management Settings

Removing ObjectDB evaluation restrictions (of 10 entity classes and 1,000,000 entity objects

Detached Entity Objects

an instance of an entity class or it is a removed entity. A TransactionRequiredException is thrown

Numbers in JPQL and Criteria Queries

function removes the minus sign from a specified argument and returns the absolute value

Retrieving JPA Entity Objects

the New, Removed or Detached states). If the object does not exist in the database anymore

Privacy Policy

to remove that information from Our servers. If We need to rely on consent as a legal basis

Obtaining a JPA Database Connection

content, such as persist and remove . Database updates are collected and managed in memory and applied

CRUD Database Operations with JPA

(); for (int i = 0; i = 100) { em. remove (p); // delete entity } else { p.setX(p.getX() + 100); // update

Eclipse Public License - v 1.0

of this Agreement must be included with each copy of the Program. Contributors may not remove or alter any

Posting Sample Code

( no persistence unit ). Keep the test as simple as possible - remove unnecessary code (but keep it complete

ObjectDB Object Database Features

are handled automatically. Removed fields are handled automatically. Most field type changes are handled

ObjectDB Website - Terms and Conditions of Use

engineer any software contained on ObjectDB Software's web site; remove any copyright or other proprietary

Database Explorer

an entity object). Elements can be removed from the collection using the  Edit Delete command

Removing of an entity removes also another entity type

. All ResolverMapping entities are removed by a query (DELETE FROM ...), afterwards ResolverMapping entities ... with a result and after that a ToleranceDefinition entity is removed from database by entitymanager. remove (obj). Directly after remove we try to retrieve again the ResolverMapping entities from

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

EmbeddedSystems Hello, we got now an exception in a use case in which we removed an entity. Exception in ... that we can access the persisted objects of the ' removed ' entity. And now we are a little bit confused, because we thought that the instances are removed if we remove the entity class. In the past

Issue with cascade delete & add/remove

. However, when removing an Address from the collection and immediately adding it again to the collection (within one transaction!) then the Address entity is yet removed from the database, eventhough ... to clear the collection first, commit that and then remove the Contact? thanks! quasado Alexander Adam

Schema-Update: Rename superclass and remove one subclass

Hello, we renamed a superclass and removed one of the subclass. If we then try to open ... to RenamedSuperClass and Remove the ChildClassB.   @Entity @Access(AccessType.FIELD) public ... and removing one of its subclasses at the same time. After investigating this issue

Remove of an entry from a @OneToMany collection is not possible if the enhancer is disabled

Hello! When the JPA entities are not enhanced the removal of an entry from a @OneToMany collection ... .getChildEntityContainer(). remove ("01"); does not work correctly with not enhanced JPA entities. package ... ();   entityManager. remove (parentEntity.getChildEntityContainer().get("01"));   parentEntity

Remove an entity which attributes were changed

and the entity is passed to plugin B. Plugin B changes an attribute on the entity. Plugin C removes ... lock exception of the removed entity.   If this operations on the entity are executed in ... although the entity will be removed , if we use three OSGi plugins. btc_es BTC EmbeddedSystems The question

Cascade.ALL with LAZY fetchtype does not clean up all references on remove

Hello, I have a tree of entity classes that reference others using Cascade.ALL in combination with FetchType.LAZY. If I now delete a root entity using EntityManager. remove all leaf nodes will not ... the database. If you remove the FetchType everything works. Best regards Markus doppelrittberger

NULL reference, how to remove

we have in our db these objects, how can we remove them (we did already a -cp Doctor):     hgzwicker Hans-Georg Zwicker More information is needed about this NULL reference ... reference? If they are ordinary null values in the ArrayList then you can use List 's remove method. See also this question on stackoverflow.   support Support

[ODB1] Chapter 6 - Persistent Objects

. The Utilities.unbind( ... ) method removes an object name: import com.objectdb.Utilities; : : pm.currentTransaction().begin(); Utilities.unbind(pm, "me"); pm.currentTransaction().commit(); Removing a name also requires an active transaction. When the transaction is committed, the name is removed

[ODB1] Chapter 8 - ObjectDB Server

address restriction. The minus value in the delete attribute removes an inherited permission

[ODB1] Chapter 3 - Persistent Classes

Most of the changes to persistent classes do not affect the database. This includes adding, removing