OneToMany 5 « Map « JPA Q&A





1. @OneToMany + @OrderBy + limit    forum.hibernate.org

Hi guys, I'm quite new with Hibernate. I could really use your help. Basically, I have two entities: let's call it Item and ItemRevision. The Item, for simplicity, only holds an ID property. All information regarding it is stored in an ItemRevision (such as name). The ItemRevision references some Item it describes and has dateValid property. Basically, a revision is valid ...

2. @OneToMany conditional saving    forum.hibernate.org

3. java.lang.NullPointerException onetomany-manytoone    forum.hibernate.org

Author Message anut Post subject: java.lang.NullPointerException onetomany-manytoone Posted: Fri May 30, 2008 1:11 pm Newbie Joined: Thu May 22, 2008 2:16 pm Posts: 9 I am new to Hibernate.(just 2 days) . I am trying to add two addressess for my Customer object. I have two Tables Customer and CustomerAddresses There is one to many relationship from Customer table's ...

4. @OneToMany weird issue, probably newbie mistake?    forum.hibernate.org

Newbie Joined: Fri Sep 02, 2005 2:55 pm Posts: 3 Hibernate version: 3.2.6 Mapping documents: Hello, i have this hibernate code: Code: public List findAll() { List lista; Session session = HibernateUtil.getCurrentSession(); try { ...

5. @Fetch(FetchMode.SUBSELECT) and OneToMany in OneToMany    forum.hibernate.org

Hi, I have a relation like that ; Person Home Home Room I load a group of Person. So Hibernate generate : A) 1 SQL for load the group of Person (for exemple 10 person) B) 10 SQL for loading the Home of each person (for exemple 5 home/person) C) 5 * 10 SQL for loading the Room So ...

6. OneToMany ClassCastException configuration problem    forum.hibernate.org

@Entity @Table(name = "locations") public class Location { ... @OneToMany(targetEntity = Type.class) @JoinTable( name = "locations_types", joinColumns = @JoinColumn(name = "location_id"), inverseJoinColumns = @JoinColumn(name = "type_id") ) @OrderBy(value = "type") ...

7. Resulting OneToMany collection contains identical objects    forum.hibernate.org

Having a problem with a OneToMany-mapping. After doing a find, the collection-field with the OneToMany-mapping has the right amount of objects in it but they are all the same. For example, if one "Utlamningsstalle" is connected to 4 different "Postnummer", i get a collection containing 4 "Postnummer" objects but they are identical (the first "Postnummer" the database returns times 4). I've ...

8. Class Cast Exception with OneToMany association    forum.hibernate.org

One problem is here: Code: @OneToMany(cascade = CascadeType.ALL, mappedBy = "item") @JoinColumn(name = "bitm_numb", referencedColumnName = "bitm_numb_chld") private List sos; First of all, you should not have mappedBy and @JoinColumn in the same relationship. Second and most importantly, property "item" in Sos is int, but Hibernate expects, as in any inverse relationship, ...

9. How to fetch OneToMany lazy fetch    forum.hibernate.org

Hibernate version: WHat comes with JBoss 4.2.2GA Code I have a entity that contains a collection of a second entity. The mapping is OneToMany, however I had no way to populate the collection and it is always empty. EAGER fetch won't work, I guess because of this Hibernate open bug HHH-2862. Please help me to figure out how to get the ...





10. Best practice for managing OneToMany relationships    forum.hibernate.org

Hi! I have some thoughts about how to to keep both sides of an OneToMany relationship in sync with each other. Are there any best practices or things to avoid in my example below? Let's say I have classic Parent / Child case. One Parent can have many children, one Child can only have one Parent. So the Child is the ...

11. @OneToMany Problem    forum.hibernate.org

Hi, i have a little mapping problem... Code: @Entity @Table public class VersionDescriptor { ... @OneToMany(fetch = FetchType.LAZY) @Column(nullable=true) private List predecessors = new ArrayList(); ... @OneToMany(cascade={CascadeType.ALL}, fetch = FetchType.LAZY) @Column(nullable=true) private List sucessors = new ArrayList(); ...

12. wrong uniqueconstraints with oneToMany    forum.hibernate.org

hi everyone! i'm having a 1:n relationship and tried nearly anything to make hibernate create right unique constraints. my last attempt was following code. Code: @AccessType("field") @CollectionOfElements @JoinTable(name = "PRODOFFERS_PRODOFFERPRICES", joinColumns = { @JoinColumn(name="PRODUCT_OFFERING_ID", unique = true) ...

13. Simple OneToMany not working    forum.hibernate.org

Author Message gregthoen Post subject: Simple OneToMany not working Posted: Wed Aug 20, 2008 3:55 pm Newbie Joined: Mon Aug 11, 2008 2:59 pm Posts: 11 Hibernate version: Hibernate Annotations 3.3.1.GA, Hibernate 3.2.6, Hibernate EntityManager 3.3.2.GA Hi, all. I have a one-to-many that appears to be by-the-book according to the hibernate documentation, but the collection is always empty. If ...

14. Problems, when using @OneToMany with @JoinTable    forum.hibernate.org

Hi, unfortunately I didn't get an answer to my question. I debugged into the Loader class. The method of interest is the doQuery method. - The first (for process with id = 5) I entered this method the local results variable has three entries where each TextResource holds only the id. The rest seems to be done within the initializeEntitiesAndCollections method. ...

15. bidirectional reflexive OneToMany association    forum.hibernate.org

16. OneToMany mistake    forum.hibernate.org

Newbie Joined: Mon Sep 01, 2008 3:41 am Posts: 19 Hi, I need to do the @OneToMany. I do like this: Code: package com.uw.diode.entity; import java.io.Serializable; import java.util.Collection; import java.util.Date; import static javax.persistence.CascadeType.ALL; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.SequenceGenerator; import javax.persistence.Table; @Entity @Table(name="ReportCabecera") public class CabeceraInforme implements Serializable { ...





17. OneToMany in Composite PK Entity causes PropertyAccessExcept    forum.hibernate.org

Regular Joined: Thu Sep 06, 2007 2:22 am Posts: 108 Location: Noida,India I am using Hibernate Core-3.2.4sp1 and Hibernate Annotation - 3.2.0 GA. I need to create @OneToMany join between two tables using join on two non-directly related columns. I've tried to simplify this code to illustrate the objective. Code: @Embeddable public class StudentPK implements Serializable { private ...

18. Problems with OneToMany between two Superclasses    forum.hibernate.org

@Entity @Inheritance(strategy = InheritanceType.SINGLE_TABLE) public class B { @Id @GeneratedValue(strategy = GenerationType.TABLE) protected Long id; @ManyToOne(optional = false, fetch = FetchType.LAZY, cascade = CascadeType.REFRESH) protected A a; ...

19. JPA OneToMany - Null foreign key?    forum.hibernate.org

@Entity @Table(name="team") public class Team implements Serializable { // ... attributes ... @OneToMany(mappedBy="team", cascade=CascadeType.ALL) private Set players = new HashSet(); public void addPlayer(Player player) { players.add(player); } // ... methods - using POJO getters / setters ... }

20. multiple updates in OneToMany relation    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp [b]Hibernate version:3 Hello, I'm using annotations and I have 3 classes like this : @Entity @Table(name = "PROJECTS") public class Project implements IsSerializable { @Id @Column (name= "PROJ_ID") private Integer id; @Column (name= "PROJ_DESC") private String descripcion; @Column (name= "PROJ_DET") private String det; @OneToMany @JoinColumn (name = "PROJ_ID") @Cascade ({CascadeType.ALL, CascadeType.DELETE_ORPHAN}) ...

21. @OneToMany unidirectional relation problems    forum.hibernate.org

Hello, I have defined two classes like this : @Entity @Table (name="PROJECT_ACTIVITIES") @SequenceGenerator(name = "SEQ_PACT_ID", sequenceName = "SEQ_PACT_ID", allocationSize = 1) public class Activity implements IsSerializable{ @Id @Column(name="PACT_ID", nullable=false) @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_PACT_ID") private Integer id = null; @Column(name="PACT_DESC") private String desc = null; @Column (name ="STATE") private Integer state = null; @Column (name ="PROJ_ID") private Integer idProject = ...

22. SQL Query for Collection object [OneToMany]    forum.hibernate.org

23. @OneToMany with @OrderBy and fetch=FetchType.EAGER problem    forum.hibernate.org

I'm trying to retrieve a large list of Product, each of which is associated with 0..n ProductHistory that represent a historical price and date for the product. I want each Products List to be sorted by date when it is loaded, so I've added a @OrderBy("datePosted DESC") annotation on the product side of the association. This works like I would expect ...

24. Using a named query and a loader to map a OneToMany Set    forum.hibernate.org

I am attempting to use a named query in hibernate version 3.2.4.sp1 to load a Set of objects in a POJO. When I do so, I get the following error: java.lang.NullPointerException at org.hibernate.collection.PersistentSet.toString(PersistentSet.java:333) I have traced the problem to the fact that for standard OneToMany mappings, hibernate uses a org.hibernate.loader.collection.OneToManyLoader. This class properly creates the "set" object that is wrapped by ...

25. Annotations, OneToMany    forum.hibernate.org

26. OneToMany Mapping    forum.hibernate.org

Newbie Joined: Mon Dec 08, 2008 8:26 pm Posts: 1 Hi , i am a hibernate and spring newbie and i have some questions regarding how to setup onetomany unidirectional mapping. i setup a dao and its corresponding test class using spring, hibernate, testng using annotations etc with an app-sevlet.xml that sets up my beans and transactions. I have setup the ...

27. OneToMany with compound key    forum.hibernate.org

@Entity public class A extends BaseEntity { private List events = null; @OneToMany @JoinColumns( {@JoinColumn (name="entityId"), @JoinColumn (name="entityName")} ) public List getEvents() { ... } // more code }

28. OneToMany fetch    forum.hibernate.org

Hibernate Community View topic - OneToMany fetch Login Register FAQ Search View unanswered posts | View active topics Board index Hibernate & Java Persistence Hibernate Users All times are UTC - 5 hours [ DST ] OneToMany fetch Page 1 of 1 [ 1 post ] ...

29. @OneToMany and Cascade.All not working    forum.hibernate.org

@OneToMany(targetEntity = Assignment.class, mappedBy = "location", fetch = FetchType.EAGER, cascade = { CascadeType.ALL } ) @Cascade(org.hibernate.annotations.CascadeType.ALL) private Collection assignments;

30. IN statement on a OneToMany relationship    forum.hibernate.org

31. Cascade on OneToMany fails to assign primary key correctly.    forum.hibernate.org

Newbie Joined: Wed Oct 01, 2008 8:42 pm Posts: 12 Issue Description Basically, I have a simple one to many setup, with a quote object having several quote Items as it's children. When I save the quote, I want to have all quote items saved as well. The issue is that when I do this, the quote items do not get ...

32. OneToMany assocation with Cascade.ALL, delete not applied    forum.hibernate.org

I have a simple one to many association between an Item class and a ItemProperty class. I have added CASCADE.ALL on the association and everything is running fine. We also have a remote API to this service using Hessian. We have an advice that translates the Entity to a Dto and the ohter way around. We thus have an ItemDto on ...

33. OneToMany foreign Key null question    forum.hibernate.org

Newbie Joined: Sat Jan 24, 2009 8:01 pm Posts: 1 Never mind.. I removed the parent field from the child declaration and it worked........ Two tables ( one-to-many) ===================== 1) s_holiday id_s_holiday KEY other columns .. 2) s_holiday_apply2 id_s_holiday_apply2 KEY id_s_holiday Foreign Key from s_holiday other columns... With the mapping below, the MERGE statment doesnot auto-populate the foreign key ( id_s_holiday) ...

34. Problem with fetchType=eager and onetomany    forum.hibernate.org

Seems that HibernateTemplate tries to outsmart the user there, if you turn on the SQL Output i guess it includes columns with a left join. Doing this usually requires either select DISTINCT or casting the result-list to a set in order to remove duplicates. The LazyInitializationException is understandable, OSIV does one Session for the first Request, then your objects become detached. ...

35. Foreign key value null if nullable true in @OneToMany assoc    forum.hibernate.org

public class Person { protected int id; protected int version; private List

addresses = new ArrayList
(); @Id @Column(name = "Id", insertable = false, updatable = false) @GeneratedValue(strategy = GenerationType.AUTO) public int getId() { return id; } public void setId(int id) { this.id = id; } @Version @Column(name = "Version") public long getVersion() { return version; } public void setVersion(long version) { ...

36. My first OneToMany link ?    forum.hibernate.org

37. Constraints/Cascade-delete on jointable using OneToMany    forum.hibernate.org

Howdy, I've got a OneToMany using a join table, which looks something like this: Code: @OneToMany(cascade = CascadeType.ALL, fetch=FetchType.LAZY) @JoinTable(name="JOIN_TABLE", joinColumns = { @JoinColumn( name="A_ID") }, inverseJoinColumns = @JoinColumn( name="B_ID") ) private Collection ...

39. Relations (OneToMany and ManyToOne) that dont cooporate    forum.hibernate.org

Newbie Joined: Fri Mar 06, 2009 4:30 pm Posts: 3 EDIT: Got it to work! Found a FK in the db that was wrong. Had been lazy and autogenerated the tables. Inputs are still welcome though. I want to improve! Hi, thanks for your responses. Ive tried the mappedBy before, but tried it again now. The result is that all the ...

41. OneToMany association problem    forum.hibernate.org

42. OneToMany and dirty checking of the set    forum.hibernate.org

@Entity Class A { @OneToMany (cascade = {CascadeType.PERSIST, CascadeType.MERGE}, fetch = FetchType.LAZY ) @JoinColumn (name = "a_id") @org.hibernate.annotations.Cascade({ org.hibernate.annotations.CascadeType.DELETE_ORPHAN, org.hibernate.annotations.CascadeType.SAVE_UPDATE }) private Set setOfB; public void addB(B b) { ...

43. OneToMany Delete Before Save    forum.hibernate.org

I have 2 classes. Class A and Class B. A has many B. Everytime i save A, i want to delete all the existing B associated with B and insert only the new B. The A comes to me from the view and all the B's in A get updated (i.e, new B's are added or some B's are removed). The ...

44. @onetomany not updating    forum.hibernate.org

Hi, I have a relationship manytoone like this: Periodo---manytoone->dia----manytoone--->horario when I save periodo, dia and horario do not save, and it does not throw and exception, it just doesnt save. this is my code: In periodo class: @OneToMany(fetch = FetchType.LAZY, mappedBy = "periodo", cascade=CascadeType.ALL) @OrderBy("dia ASC") public Set getDias() { return this.dias; } In Dia clasS: @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = ...

45. @OneToMany List is reversing on save!    forum.hibernate.org

So I have a class with a @OneToMany @Cascade({CascadeType.ALL}) List collection; And I am using the order of this list, and allowing the user to arrange the list and this DOES WORK, and I can persist the order of the list... and yet sometimes (it seems not all the time!) when I save() the object that contains this list, after ordering ...

46. OneToMany resulting Correct and Incorrect Associations    forum.hibernate.org

@Entity @Table(name = "COLLECTIONSITE") public class CollectionSite implements Serializable { @OneToMany(mappedBy = "site", fetch = FetchType.LAZY) @Where(clause = "EFF_START_DATE <> EFF_END_DATE") private Collection miscData; } @Entity @Table(name = "MISC_DATA") public class MiscData implements Serializable{ @ManyToOne @JoinColumn(name = "SITE") private CollectionSite site; } ...

47. OneToMany - filter the mapped table results    forum.hibernate.org

48. OneToMany Filter and Cache    forum.hibernate.org

Hi; I am using hibernate 3.2.4-sp1. It seems that the filtering on collections disable the cache. The relevant mapping is : @OneToMany(mappedBy = "completeOffer", targetEntity = CalendarImpl.class, fetch = FetchType.LAZY) @Where(clause = "DisponibiliteTO = 1 and Supprime = 0 and TarifTtc is not null") @Filter(name = "currentDate", condition = ":currentDate < DateDepart") @OrderBy(value = "startingDate") @Cache(region = "OffreComplete.calendars", usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) ...

49. @OneToMany vs. one-to-many    forum.hibernate.org

Newbie Joined: Wed Jun 24, 2009 11:34 am Posts: 13 I am trying to create a Flex/Java/Hibernate project using mySQL, BlazeDS and Tomcat server. I have gotten all of that to work. But as soon as I put in tags for @OneToMany, my project breaks. A lot of the example projects I have seen have created a hbm file with one-to-many ...

51. JPA @OneToMany, FK is a part of composite PK on Many side    forum.hibernate.org

@Entity @Table( name = "test_watches" ) public class TestWatching implements Serializable { @EmbeddedId protected TestWatchingPK testWatchingPK; @Column( name = "poznamka" ) private String poznamka; public TestWatching() { } public TestWatching( TestWatchingPK testWatchingPK ) { this.testWatchingPK = testWatchingPK; } public TestWatching( TestUser user, TestTopic topic ) ...

52. Trouble with Cascading, Unidirectional @OneToMany    forum.hibernate.org

@Entity public class GenOne { @Id @GeneratedValue(strategy = GenerationType.AUTO) long id; @OneToMany(cascade = CascadeType.ALL) @JoinColumn(name = "genone") Set gentwos = new HashSet(); } @Entity public class GenTwo { @Id ...

53. @OneToMany - list content not fetched    forum.hibernate.org

Hello, I have a problem with @OneToMany relation when it points one of entity subclass. I have the basinc Application entity which is connected with all objects and I want this entity to have a list of ManagedCompany entityes (not its superclass Company). Is this possible? Everything is fine when I choose List, but List always is empty despite that entities ...

54. @OneToMany with @JoinColumns issue    forum.hibernate.org

@Entity @Table(name = "dwf_storagegroupsnapshot") public class DMFStorageGroupSnapshotFact extends SPMFact implements Serializable { @Id private LogicalSnapshotFactPK id; @Column(name="devicecount") private Integer deviceCount; @Column(name="devicemetacount") private Integer metaCount; @Column(name="capacity") private Integer capacity; @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER) @JoinColumns({ @JoinColumn(name="arraykey",referencedColumnName="arraykey",nullable=false,insertable=true,updatable=true), @JoinColumn(name="timekey",referencedColumnName="timekey",nullable=false,insertable=true,updatable=true), @JoinColumn(name="logicalkey",referencedColumnName="logicalkey",nullable=false,insertable=true,updatable=true) }) private List tierFacts; /** * Description: Ctor */ public DMFStorageGroupSnapshotFact() { } ---> Removed getter and setters }

55. No primray key generated for oneToMany association    forum.hibernate.org

Hi, I use JPA / Hibernate 3.2.6.GA and I need to model a unidirectional oneToMany association. Here is the mapping I wrote : Code: @OneToMany(targetEntity=ReponseImpl.class, cascade=CascadeType.REMOVE) @JoinTable( name="activite_reponse_", joinColumns={@JoinColumn(name="activite_fk_")}, ...

56. Cascade delete not working for @OneToMany mapping    forum.hibernate.org

Hi All, I am new to Hibernate using Hibernate3 with annotations. I have a very wierd problem in my code. I am using @OneToMany and @ManyToOne mapping between 2 classes. The logic is that one Collection can have many Files and Many Files can belong to one Collection. The code is like this: Code: In class Collection: @OneToMany (cascade=CascadeType.REMOVE, mappedBy="dataCollection") ...

57. OneToMany annotation    forum.hibernate.org

i have 3 next classes, my problem is to create the OneToMany annotation. The Problem is that the linked fields are from ItemPK and not the Item Class. i'm trying to solve this problem for long time with no success at all. My Error is: Code: Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Set, for columns: [org.hibernate.mapping.Column(itemCrossReferences)] ...

58. Basic JPA @OneToMany / @ManyToOne mapping trouble    forum.hibernate.org

I am using JPA in a J2SE application ("resource-local"), and I'm facing the following problem. Given the following entities (a Project consists of a list of Employees): Code: @Entity public class Project { @Id @Column(name="PROJECT_ID", nullable = false) private long id; @OneToMany(mappedBy="project", cascade = CascadeType.ALL) private ...

59. JPA fail when persist OneToMany    forums.oracle.com

raychen wrote: The persist call failed because you didn't initialize itemlistCollection in your JavaBean... Unlikely, it has not been specified that that list should always have values. @OP 1.) You should post EJB questions in the EJB forum. 2.) Your logic in your add method doesn't really help. I magine two people trying to add an item with the same name ...