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Failed To Lazily Initialize A Collection Of Role No Session

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Not when the parent has more than one OneToMany or if any of them returns quite a lot of rows. It seem like its taking us back to old good plain SQL days :) Read this: http://www.javacodegeeks.com/2012/07/four-solutions-to-lazyinitializationexc_05.html share|improve this answer answered Sep 19 '13 at 19:44 bkomac 49358 add a comment| Java Annotations Tutorial5. getting a transaction within the listUserWithEvent() public List listUserWithEvent() { SessionFactory sf = hibernateTemplate.getSessionFactory(); Session s = sf.openSession(); Transaction tx = s.beginTransaction(); tx.begin(); List users = hibernateTemplate.find("from User"); for (User user have a peek at this web-site

But I think you should simply try it... asked 3 years ago viewed 19426 times active 3 years ago Linked 4 JPA LazyInitializationException when returning a JAXB Object through a Webservice 1 Jackson + Hibernate = lots of problems share|improve this answer answered Aug 1 '12 at 7:26 Boris 917166 2 (1) worked for me perfectly. Typically we open up a hibernate session before we make DAO calls and don't close it until we are done with all lazy loads. why not find out more

Failed To Lazily Initialize A Collection Of Role No Session

share|improve this answer answered Aug 19 '10 at 14:01 Javid Jamae 4,4362150 add a comment| up vote 2 down vote The following code can cause similar error: using (var session = throwLazyInitializationException(AbstractPersistentCollection.java:393) [hibernate-core-4.0.1.Final.jar:4.0.1.Final] at org.hibernate.collection.internal.AbstractPersistentCollection. If you use Spring framework, you can use OpenSessionInViewFilter. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

When the JPA/Hibernate tries to access the database to get this lazy information, the JPA will notice that there is no opened collection. Anyway, DO NOT use the following Anti-Patterns as suggested by some of the answers: Open Session in View hibernate.enable_lazy_load_no_trans Sometimes, a DTO projection is a better choice than fetching entities, and This design pattern is very easy to apply and there is two basic actions: open the database connection and close the database connection.You will need to edit the “web.xml” and add Hibernate.initialize Example A query can create almost a infinity number of other queries.This approach can be applied to JSE and JEE.Continue to the second part of this tutorial.Reference: Four solutions to the LazyInitializationException

Digital Hardness of Integers Sunlight and Vampires Detect MS Windows What is the name of these creatures in Harry Potter and the Deathly Hallows? Don't use lazy load. Not the answer you're looking for? Apex schedulable jobs Ultimate Australian Canal Where can I find Boeing 777 safety records?

share|improve this answer answered Nov 23 '13 at 13:05 community wiki isnot2bad You mean something like this? Failed To Lazily Initialize A Collection Of Role Many To Many TeXForm handling of derivative higher than two more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback asked 6 years ago viewed 90407 times active 1 year ago Linked -1 org.hibernate.LazyInitializationException: could not initialize proxy - no Session exception while trying to add collection -1 JPA LazyInitializationException? It should be able to cast * to [emailprotected] java.util.List}.

Collection Is Not Associated With Any Session

How can "USB stick" online identification possibly work? http://stackoverflow.com/questions/3041259/hibernate-spring-failed-to-lazily-initialize-no-session-or-session-was-closed Something like: public List listUserWithEvent() { return sessionWrapper.runLogic(new Callable() { public List call() { List users = hibernateTemplate.find("from User"); for (User user : users) { System.out.println("LIST : " + user.getName() + Failed To Lazily Initialize A Collection Of Role No Session It should be able to cast * to [emailprotected] java.util.List}. Caused By: Org.hibernate.loader.multiplebagfetchexception: Cannot Simultaneously Fetch Multiple Bags To load the dogs children list other database query would be fired.

How to make random draws from an unspecified distribution? http://juicecoms.com/failed-to/org-hibernate-lazyinitializationexception-failed-to-lazily-initialize-a-collection-of-role-spring.html Why would anyone want to return data from other tables when you only need data from one parent. Thank you so much for this awesome article!Reply Daisy Guti Miller July 3rd, 2013 at 8:40 pmI just had this exception and I have already read at least 4 articles on share|improve this answer answered Mar 25 '14 at 19:34 Aaron 874 2 I don't know why you guys are responding as if this is some type of easy solution. No Session Or Session Was Closed

Adapting your code, this could look like this: public List findAllEmployees() { List employees = getEntityManager().createNamedQuery("Emp.findAllEmployees", Emp.class).getResultList(); //trigger loading of attributes for(Emp emp: employees){ emp.getDeptNo().getEmpDetNo().size(); } return employees; } EDIT: Another share|improve this answer answered Nov 27 '13 at 9:36 DraggonZ 4361917 Ran into this exact error and realized that I needed a @Transactional annotation (for my Spring test context) What are the benefits of an oral exam? Source You can also be a guest writer for Java Code Geeks and hone your writing skills!

The problem is that it worked on one servercluster and did not on the other. Could Not Initialize Proxy - No Session Jpa Check bellow how our code will look like: ConnectionFilter com.filter.ConnectionFilter ConnectionFilter /faces/* package com.filter; import java.io.IOException; import javax.annotation.Resource; import javax.servlet.*; import javax.transaction.UserTransaction; public class ConnectionFilter implements Filter { Some of the other similar questions didn't solve the problem.

Set lazy=true in XML or Set @OneToMany(fetch = FetchType.LAZY) In annotation.

How does Decommission (and Revolt) work with multiple permanents leaving the battlefield? Step forward: Thanks to Thierry I got one step further (I think). now what? Opensessioninviewfilter Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries.

If you try to access the page with the code above you will see the exception bellow:[javax.enterprise.resource.webcontainer.jsf.application] (http–127.0.0.1-8080-2) Error Rendering View[/getLazyException.xhtml]: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.model.Person.lazyDogs, i'm using JPA so hibernate open session in view filter doesn't work obviously. parameters) throws IllegalArgumentException, ServiceException { if (StringUtils.isBlank(queryOrQueryName)) { throw new IllegalArgumentException( "Query for executing cannot be null"); } if (firstResult < 0) { throw new IllegalArgumentException( "First result cannot be less http://juicecoms.com/failed-to/failed-to-lazily-initialize-a-collection-of-role-hibernate.html I mention portability because AFAIK Hibernate offers at least one different approach to explicitly trigger loading that is not part of the JPA spec.

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