entitymanager Questions
5
I want to migrate a project from spring boot 2.2.7 to spring boot 3.0.0.
For this I generated a fresh project with spring starter and beside what was generated I added few of my dependency's:
lomb...
Epigoni asked 6/12, 2022 at 8:18
2
I'm trying to get a better handle on the use of Spring's @Transactional attribute. I understand that it basically wraps the contents of the method marked as @Transactional in a transaction. Would i...
Umbrageous asked 5/6, 2015 at 13:36
3
Solved
Some confusing explanation:
flush(); Flushing is the process of synchronizing the underlying persistent store with persistable state held in memory.it will update or insert into your tables in the ...
Beaulahbeaulieu asked 20/8, 2015 at 2:10
7
What is the difference between:
@Autowired
private EntityManager em;
versus:
@PersistenceContext
private EntityManager em;
Both options work in my application, but can I break something by us...
Cancellate asked 10/7, 2015 at 7:44
5
Solved
I got the following code
@Stateless
public class BondecomandeDAO {
@PersistenceContext
private EntityManager em;
public Bondecommande findBCbyid(int id)
{
Query q =em.createNamedQuery("sele...
Termitarium asked 10/12, 2013 at 15:2
5
I am working on standardizing a legacy code base and new development to both use EntityManager for persistence. In order to succeed however, I need to provide the ability to break out into native S...
Oxytocic asked 6/5, 2015 at 21:39
2
Solved
I use Hibernate 5.1.0.Final. My GenericDAO class main methods:
public T save(T entity) {
entityManager.getTransaction().begin();
entityManager.persist(entity);
entityManager.getTransaction().co...
Bancroft asked 16/8, 2016 at 12:25
5
I am trying to insert a data in my database, i am using JPA in my project.
This is what my bean looks like.
@PersistenceContext
EntityManager em;
em.createNativeQuery("INSERT INTO testtable ('...
Linea asked 29/5, 2013 at 3:54
16
Solved
EntityManager.merge() can insert new objects and update existing ones.
Why would one want to use persist() (which can only create new objects)?
Manzoni asked 1/7, 2009 at 16:3
2
Solved
I'm using the JPA EntityManager + Hiberate, and a myserious piece of the where clause is appearing. The debug from Hibernate is basically showing:
select /* bunch of columns */
from some_table
whe...
Egregious asked 6/6, 2013 at 22:5
4
I believe the entity that I wish to delete, is a managed entity. But, regardless, why is merging it then removing it giving me the following error:
deleted instance passed to merge
Someone said o...
Guttery asked 15/10, 2014 at 17:46
4
Solved
I have the following SQL Query :
SELECT COUNT(*) FROM DOG where ID = 'SampleId';
I am trying to write this in java :
public int returnCountOfDogTable(String id){
String sql= "SELECT COUNT(*...
Paraffin asked 4/10, 2016 at 16:13
21
Solved
[Doctrine\ORM\ORMException]
The EntityManager is closed.
After I get a DBAL exception when inserting data, EntityManager closes and I'm not able to reconnect it.
I tried like this but it didn...
Ufa asked 10/1, 2013 at 13:3
4
Solved
I would like to use the autowiring in a service that use 2 different entity manager. How to achieve something like that ?
use Doctrine\ORM\EntityManager;
class TestService
{
public function __con...
Yesima asked 10/12, 2019 at 11:39
1
Solved
The em.refresh(person) in the following code does not work. Rather than refreshing the person with a fresh value from database, it resets (undo or discards) the changes made in the cache. I am not ...
Scholl asked 24/9, 2021 at 6:33
3
I'm trying to write JUnit tests for a stateless session bean that has an injected EntityManager:
@Stateless
public class MyServiceBean implements MyService, ... {
@PersistenceContext
private Enti...
Transition asked 2/2, 2012 at 13:5
7
Can anybody explain what is the difference between the Spring Framework's LocalContainerEntityManagerFactoryBean and LocalEntityManagerFactoryBean?
Mancy asked 27/5, 2011 at 19:28
5
Solved
I have an EJB where I am saving an object to the database. In an example I have seen, once this data is saved (EntityManager.persist) there is a call to EntityManager.flush(); Why do I need to do t...
Stevana asked 17/7, 2013 at 15:0
2
Solved
I am using Wildfly 8.1 together with a EJB Project (EJB 3.2) containing entities. When trying to inject the Entity Manager into one of my Beans i get the following:
JBAS011440: Can't find a persi...
Zampardi asked 19/10, 2015 at 14:2
4
Solved
I am trying to use Pagination with EntityManager.createNativeQuery(). Below is the skeleton code that I am using:
var query = em.createNativeQuery("select distinct id from ... group by ... hav...
Gameto asked 4/9, 2020 at 9:56
4
Solved
I have an application that uses Hibernate/JPA, with Spring and Jersey. In my application context I set the data source, define an entity manager factory, set the transaction manager with that entit...
Ternion asked 8/2, 2012 at 23:22
1
Symfony2: how to get all entities of one type which are marked with "EDIT" ACL permission?
Can someone tell me how to get all entities of one type which are marked with "EDIT" ACL permission?
I would like to build a query with the Doctrine EntityManager.
Pagandom asked 1/6, 2011 at 12:39
3
Solved
I'm currently getting connection timeout errors from my EntityManager queries. Is it possible to set a timeout for these?
persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persiste...
Timberwork asked 16/6, 2014 at 13:13
1
Solved
Doctrine advises that -
Calling Doctrine\ORM\EntityManager::clear() with any arguments to
clear specific entities is deprecated since doctrine/persistence 1.3 and will be removed in 2.0.
We h...
Tamelatameless asked 29/1, 2020 at 15:20
5
Solved
I am introducing JPA2.0 in my application working on Oracle9i database and I added the libraries EclipseLink(JPA2.0) and created the entity classes but when I use
javax.persistence.criteria.Crite...
Parse asked 24/4, 2012 at 13:25
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