bidirectional 1 « Map « JPA Q&A
1. Saving bidirectional ManyToMany stackoverflow.comI have two entity classes annotated in the following way |
2. bidirectional hibernate relationship stackoverflow.comi have a webapplication, using hibernate and the following entities. What do I wrong: |
3. Hibernate bidirectional parent/child problem stackoverflow.comI'm having a problem implementing a bi-directional parent/child relationship using hibernate 3. The parent, in this case is of the class ReportCriteria. The child is of class PkVisit. I've pasted my ... |
4. Bidirectional HQL Query with NHibernate stackoverflow.comI'm fairly new to HQL / NHibernate so this may be a bit of an amateurish question. Basically I have a bidirectional many-to-one association. In my query, I am trying to ... |
5. @PrimaryKeyJoinColumn with Bidirectional @OneToOne relationship stackoverflow.comI have two objects Mat and MatImage, parent and child resp. The primary key of MatImage is the id of Mat and they are join by one to one relationship. If ... |
6. Can't figure out a one-to-many bidirectional association with join table stackoverflow.comI'm trying to figure out this mapping, and somehow it's just eluding me. It's irritating, because it seems like it should be a common case. I have a basic Parent and Child ... |
7. KODO: how set up fetch plan for bidirectional relationships? stackoverflow.comRunning KODO 4.2 and having an issue inefficient queries being generated by KODO. This happens when fetching an object that contains a collection where that collection has a bidrectional relationship back ... |
8. Hibernate mapping to manage bidirectional relationship using intermediate table stackoverflow.comI have an object hierarchy that is as follows. Party > inherited by > Organization and Person Organization > inherited by > Customer, Vendor Person > inherited by > Contact In the database I have ... |
9. How to solve circular reference in json serializer caused by hibernate bidirectional mapping? stackoverflow.comI am writing a serializer to serialize POJO to JSON but stuck in circular reference problem. In hibernate bidirectional one-to-many relation, parent references child and child references back to parent ... |
10. JPA - Removing of elements of a bidirectional Relationship stackoverflow.comWhy can i remove elements of a bidirectional relation although only one side of the relation is managed in persistence context (Example I)? When i have an unidirectional Relationship that doesn't ... |
11. hibernate @ManyToMany bidirectional eager fetching stackoverflow.comI have a question which I think should be pretty common but I can't find an answer. I have 2 objects: Group and User. My classes look something like this: |
12. How do I properly cascade save a one-to-one, bidirectional relationship on primary key in Hibernate 3.6 stackoverflow.comI have an one-to-one, bidirectional entity relationship with shared keys. When I attempt to save the owner of the association I get a "null id generated" exception against the owned side ... |
13. Bidirectional relationship in MappedSuperclass stackoverflow.comIn JPA2.0 specification is written: Persistent relationships defined by a mapped superclass must be unidirectional.Why can't be used bidirectional relationship in @MappedSuperclass class? I tried it in Hibernate ... |
14. Foreign Key constraint violation with bidirectional one-to-one relationship with shared primary key stackoverflow.comI am trying to create with JPA a one-to-one association between two classes, one being the parent, and the other the child, with a generator to make sure they have the ... |
15. Hibernate Bidirectional Many to Many implementation stackoverflow.comI am new to hibernate and I want to implement something like this in hibernate. To be able to do this, I am getting problem in setting the xml mapping file. ... |
16. Creating a collection based on map keySets using Hibernate Annotations stackoverflow.comIn an application I am working on we have the following three components: User, Domain, RoleSet. Each domain keeps a Map<User, RoleSet> as a form of ACL and every user keeps ... |
17. j2ee - One to many bidirectional stackoverflow.comTo my understanding a Unidirectional one-to-many relationship has a join table and a Bidirectional one-to-many relationship hasn't. My application works when I implemented the Unidirectional relationship but I can't seem to get ... |
18. Is this a bidirectional one-to-many relationship? stackoverflow.comIs this a bidirectional one-to-many relationship? Booking class: |
19. Is it OK to have only bidirectional relationships with Hibernate? stackoverflow.comSo the question is pretty much in the title. Let's say I have some classe: User, Post, Comment and Tag.
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20. What is the difference between Unidirectional and Bidirectional associations? stackoverflow.comWhat is the difference between Unidirectional and Bidirectional associations? Since the table generated in the db are all the same,so the only difference I found is that each side of the bidiretional ... |
21. Hibernate self-reference mapping puzzle stackoverflow.comI am trying to map a class |
22. EclipseLink/JPA2 ManyToOne bidirectional cascade persist issue stackoverflow.comThis is similar to How to cascade persist using JPA/EclipseLink I have to entities like so. One is RoomEntity that has a one to many bi-directional relationship with ComputerEntity. eg. each ... |
23. Hibernate bidirectional @ManyToOne, updating the not owning side not working stackoverflow.comI have a really simple setup to try out a bidirectional mapping with annotations: |
24. JPA: OneToOne bidirectional relation stackoverflow.comAssume there are two entities with OneToOne relation: |
25. JPA Bidirectional One to Many Foreign Key Issues stackoverflow.comI have two entitys Person and Order being managed by JPA/Hibernate Entity Manager. I have attempted to create a Bidirectional one to many relationship between the two entitys by annotating ... |
26. Hibernate - how to delete bidirectional many-to-many association stackoverflow.comProblem: I have many-to-many association between two entities A and B. I set A entity as an owner of their relationship(inverse=true is on A's collection in b.hbm.xml). When i delete an A entity, ... |
27. Hibernate: AnnotationException: Unknown mappedBy in ... referenced property unknown on reverse (mappedBy), bi-directional @OneToOne associations stackoverflow.comI have the following simple design:
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28. JPA (with Play!) bidirectional Many-to-Many - how to remove from both sides of the relationship? stackoverflow.comI have the following mapping in my Play! app using JPA: |
29. Mapping bidirectional asymmetric relation in hibernate: OneToOne-ManyToOne stackoverflow.comI have an entity that has reference to another entity that represents the current state of certain properties, thus allowing me to keep track of the history of changes made. For ... |
30. Hibernate bidirectional query stackoverflow.comI have a question regarding Hibernate bidirectional. Lets say I have 2 classes, |
31. When is it appropriate to use a bidirectional association and when is it not? stackoverflow.comLet's pretend that we want to build an eBay like app in which we have an entity named |
32. bidirectional many-to-many association using a Map instead of a Set stackoverflow.comI'm having a bear of a time with this and any suggestions would be greatly appreciated. I have a bi-directional many-to-many association mapping between two entities (FlashCard and Tag) that is currently ... |
33. How to handle bidirectional relationships when constructing hibernate entities? stackoverflow.comI want to model the relationship between two entities, a group and an account with JPA/Hibernate. An account can have several groups, but not vice versa, so we have a OneToMany ... |
34. Hibernate: bi-directional one-to-many with one as parent stackoverflow.comI'm trying to setup a bi-directional one-to-many relationship with "one" as parent I have a parent: |
35. BiDirectional relationship isn't setting relationship? stackoverflow.comConsider the following two classes |
36. hibernate one to many bidirectional association is not deleting child object stackoverflow.comI try to update parent object with deleted child object. It passes successfully, however next load returns deleted object again. It is one to many bidirectional relationship. I am not sure ... |
37. Hibernate One to many bidirectional with subclass mapping stackoverflow.comHibernate newbie here. I have class University with one to many relationship with class Student. Class Student has many to one with University. I'd like Student to have a many to one ... |
38. JPA Bidirectional join--Is projection more efficient than critiera.in? stackoverflow.comSuppose I have some sort of bidirectional relationship, such as employee->phone, where employee has one to many phones and phone has one employee. Later I have some Dao class where I ... |
39. Update bidirectional ManyToMany from both sides stackoverflow.comreferring the question Saving bidirectional ManyToMany i want to obtain exacltly what accepted answer explain as incorrect: ... |
40. Bidirectional one-to-one mapped to multiple fields stackoverflow.comI have a domain class called |
41. Bidirectional relationship with superclass entity property in JPA stackoverflow.comI'm tying to implement some tree-like structure with JPA. I have a "folder" entity and a "test" entity. Folder can contain both folders and tests. Test doesnt contains anything. Both test and ... |
42. one to one bidirectional hibernate mapping stackoverflow.comI was trying to implement hibernate one-to-one bidirectional mapping between Person class and Address class using annotation. While running the program it gave me some errors |
43. Unidirectional or bidirectional relationships in JPA? stackoverflow.comPossible Duplicate:Under which circumstances or which criteria should I follow in order to choose between unidirectional ... |
44. Hibernate: bidirectional one-to-many foreign key constraint fails stackoverflow.comI want to implement a one to many relation using hibernate (in java). I have 2 Entities.
Experiment has many ExperimentGroups. I tried to configure this one to many relation, the way the ... |
45. Hibernate bidirectional Many-to-one association error stackoverflow.comI have two classes I'm trying to associate, and on runtime I get the following exception: |
46. Bidirectional one-to-one association: Hibernate fetches entities twice stackoverflow.comI have two entities, |
47. JPA: bidirectional associations seamframework.orgWhat you're doing is mixing up conceptual thinking with implementation tricks. A DB doens't support out-of-the-box all kind of ralations between classes you would like to have. Things like polymorphism and inheritance are difficult to implement in DB's but thanks to Hibernate we can do a lot already. And this includes also bi-directional associations. True, there are smart ways to retrieve ... |
48. Hibernate: one-to-many bidirectional mapping. Stack Overflow coderanch.comHi, I am trying a one-to-many bidirectional mapping. An Event has multiple EventAttributes. Event event = new Event(); Set s = new HashSet(); EventAttribute ea = new EventAttribute(); ea.setEvent(event); s.add(ea); event.setEventAttributes(s); dao.saveEvent(event); Mapping: |
49. Hibernate StackOverflowError: bidirectional many-to-many coderanch.comAuthor Hibernate StackOverflowError: bidirectional many-to-many Brian Kuhn Greenhorn Joined: Nov 19, 2003 Posts: 7 posted May 26, 2005 15:01:00 0 I have two objects to persist; Account and Role. Account has a String username, a String password and a Set of Roles. Role has a String name, and a Set of Accounts. Hibernate creates a join table called accountroles to manage ... |
50. Bidirectional relationships on Objects in Jpa coderanch.comHi All, In my application for a scenario inheritance is much suited design. ie N child Objects tied to a parent object{Grouping common attributes} As JPA doesn't support such inheritance my application expected, we where forced to use "One to Many" Bidirectional Mapping.In the same i have few questions. eg class Parent{ attributes @OneToMany list |
51. Hibernate One-To-Many bidirectional coderanch.comHi, Got a problem with hibernate lazy loading for one to many bidirectional relationship. Let's say I have the following class: @Entity public class User { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Integer id; @OneToMany(cascade={CascadeType.ALL}, fetch=FetchType.LAZY, mappedBy="user") private List |
52. Hibernate : Bidirectional Association coderanch.comAssume one to many relationship exists between Item and Bid and is bidirectional. As we need to access them in either way,to save an item, we need to write : bid.setItem(item);//Line 1 Set bidset = new HashSet(); bidset.add(bid); item.setBids(bidset);// Line 2 CASE 1: suppose i only comment line 1 and then save item : a)it's inserting into ITEM table b) It's ... |
53. Hibernate: Many-to-many bidirectional mapping. Stack Overflow coderanch.com |
54. Hibernate One to Many Bidirectional with assigned as Primary Key coderanch.comHi , I am struck up here . Please somebody help me I am trying to use Hibernate One to Many Bidirectional with assigned as Primary Key public class Writer implements java.io.Serializable { private long id; private String name; private Set stories ; public class Story implements java.io.Serializable { private long id; private Writer writer; private String info; Inside my client ... |
55. Avoid StaleObjectStateException in hibernate for bidirectional relation coderanch.comHello, I have the following problem: I have a class Group public class Group implements java.io.Serializable { private Long id; private Set |
56. about hibernate unidirectional and bidirectional coderanch.com |
57. does Hibernate support one-to-one bidirectional in subclass? coderanch.comi have two mapping file |
58. Hibernate Bidirectional relationship + pass by reference coderanch.comI have two classes that know about each other - Foo and Bar. I load a Foo with a specified id, which loads the Bar but the Foo inside the Bar is not the same instance. The problem only occurs when specifying the Foo by id: I have another class FooList that aggregates Foo and upon loading a FooList the references ... |
59. JPA ManytoMany Bidirectional relation throwing exception... coderanch.comHello, i am facing difficulty in managing the many to many relation with JPA in my application. The sceen is like this.... Role & Dist_list have many to many relation among each other. beside the Role and Dist_List tables the relation is placed in another table role_dist_test table{role_id,dist_list_id} IN DistList.java relation is defined as @ManyToMany(cascade = CascadeType.ALL) @JoinTable(name = "role_dist_test", joinColumns ... |
60. JPA-Hibernate One-to-One Bidirectional Relationship issue coderanch.comHello, I am having issue understanding hibernate's persistence flow for one of the sample code from Enterprise Java Beans 3 5th Edition book I am using MySql as DB Basically, i am trying to create a one-2-one bi directional relationship between Customer & CreditCard entities where Customer table in db will hold CreditCard's PK & vice versa. All said & done, ... |
61. Hibernate Bidirectional Mapping Problem. coderanch.comHi, I have a parent child relationship. Dept (One) ------ Student (Many) Trying to persist a Dept along with its students. Can see Dept entry in the database table. Can see Student entries in the database table. Problem : Student (child entity)entries have foreign key column as null in database. What could be the problem for this? Tried the following approaches. ... |
62. Bidirectional One-to-one n+1 redundant select - Pls Save Me forum.hibernate.orgNewbie Joined: Wed Oct 21, 2009 5:34 pm Posts: 3 I've been trying to map a one-to-one association and I am still running into the problem of n+1 selects even after switching to nhibernate 2.1.0 which is the equivalent of hibernate 3. I think it may be the same problem in Hibernate 3 as well. I'm sorry this post is so ... |
63. Bidirectional polymorphic associations forum.hibernate.orgNewbie Joined: Thu Oct 29, 2009 2:33 pm Posts: 1 I'm trying to get a bidirectional polymorphic association to work using table-per-subclass inheritence. I've found on the Advanced FAQ a question that's similar to what I'm trying to do, but the question's answer isn't clear to me. (FAQ maintainer: examples for solutions would be appreciated.) I have a Person class and ... |
64. why is it best to make a one to many bidirectional? forum.hibernate.orgI'm reading in the java persistence book the following: Quote: At runtime, there are two different in-memory representations of the same foreign key value: the item property of Bid and an element of the bids collection held by an Item. Suppose the application modifies the association, by, for example, adding a bid to an item in this fragment of the addBid() ... |
65. creating bidirectional @OneToOne mapping with derived id forum.hibernate.org |
66. @OneToOne, bidirectional forum.hibernate.orgpublic class Boy { ... @OneToOne(cascade={CascadeType.PERSIST,CascadeType.MERGE,CascadeType.REFRESH}) @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE) @JoinColumn(name="G_oid", referencedColumnName="oid", nullable=true) private Girl girl; ... } public class Girl { ... @OneToOne(mappedBy = "girl", cascade={CascadeType.PERSIST,CascadeType.MERGE,CascadeType.REFRESH}) @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE) private Boy boy; ... } |
67. necessary to make one to many bidirectional? forum.hibernate.orgWhat if you don't set the many side of the following association? Does hibernate give an error? I read that its best to map the many to one side because it gives better performance, even if you dont need to be able to be able to get the owning object. Also what if I have the mapping like below but I ... |
68. Bidirectional join-table relationship doesn't work forum.hibernate.orgGreetings, I'm using Hibernate 3.2.1 and have found that the schema doesn't support the following use case: Inheritance using table-per-subclass strategy with a bidirectional relationship using a join table. For example: Foo has Bar elements. I want to be able to reference Foo from any Bar element. It so happens there are different types of Bar elements...CandyBar, IronBar, WhiskeyBar. Here the ... |
69. bidirectional many-to-many hibernate HQL query not working forum.hibernate.orgI am trying to fetch data from many-to-many bi direction mapping. I have three tables: eventdescription, eventtype, and eventtypedescription. eventtype is the joint table of eventdescription and eventtypedescription tables, whose primary key is the foreign key of other two tables. public class EventDescription implements Serializable { private Integer eventDescriptionId; private Set eventType = new HashSet(); . . public EventDescription() {} } ... |
70. bidirectional onetoone mapping, class used in multiple props forum.hibernate.orgpublic class House { @OneToOne (fetch = FetchType.EAGER) @Cascade ({CascadeType.PERSIST,CascadeType.MERGE,CascadeType.SAVE_UPDATE}) @ForeignKey(name="FK_House_Gardener", inverseName="FK_Gardener_House") private HouseEmployee gardener; @OneToOne (fetch = FetchType.EAGER) @Cascade ({CascadeType.PERSIST,CascadeType.MERGE,CascadeType.SAVE_UPDATE}) @ForeignKey(name="FK_House_Caretaker", inverseName="FK_Caretaker_House") private HouseEmployee caretaker; } |
71. Bidirectional many-to-many on same entity forum.hibernate.orgHello everybody, I am struggling for a while now with a mapping problem: I want to realize a bidirectional many-to many relationship on the same entity. I have a User that can have friends, which are of the type User as well. My mapping looks like that: Code: ... |
72. a bidirectional many-to-many mapping problem forum.hibernate.orgThere is a simple logic to have a try to build many-to-many bidirectional mapping. persons to addresses, that is, a person has many addresses and a address has accommodated many persons. The following are details: Java classes: public class Address implements java.io.Serializable { private Integer id; private String addressName; private Set apersonIds = new HashSet(); //omit getter and setter methods } ... |
73. Problem with @OneToOne bidirectional Hibernate Core 3.5.0-CR forum.hibernate.orgAuthor Message Webflash Post subject: Problem with @OneToOne bidirectional Hibernate Core 3.5.0-CR Posted: Thu Feb 25, 2010 10:55 am Newbie Joined: Thu Nov 22, 2007 8:37 am Posts: 2 Have problem with @OneToOne bidirectional looking google but not found Code: import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.ManyToOne; import javax.persistence.OneToOne; @Entity(name = "company") public class Company extends Trackable { ... |
74. about unidirectional and bidirectional forum.hibernate.org |
75. Bidirectional and EmbeddedId forum.hibernate.orgHello, I have model (simplified version described below) and cannot configure bidirectional association. Exactly to say I can access A and B from Bind class (Bind freshly fetched from DB). But I cannot access Binds neither from A or from B (A and B freshly fetched from DB). getBindings always returns null though mappedBy properly set. I tried without EmbeddedId ... |
76. Bidirectional relationship + pass by reference forum.hibernate.orgI have two classes that know about each other - Foo and Bar. I load a Foo with a specified id, which loads the Bar but the Foo inside the Bar is not the same instance. The problem only occurs when specifying the Foo by id: I have another class FooList that aggregates Foo and upon loading a FooList the references ... |
77. Bidirectional X-to-one on primary key (with annotations) forum.hibernate.orgHi all, I am having some problems designing the model to represent an existing legacy database schema. I've been referring to the documentation, and while it has lots of individual bits of information that are relevant and helpful I can't figure out how to combine them into the overall picture of what I need. The schema is broadly hierarchical, and each ... |
78. General question & Bidirectional with JoinTable forum.hibernate.orgHello! I am a newbie with Hibernate and I am using the latest version of Hibernate in my Flex/BlazeDS/J2EE project. Because I use BlazeDS, which does not support Hibernate's Lazy Loading I have to join a table. I have this example: There is a ContactGroup which is in a 1:n relation to Contact, So one ContactGroup has many Contacts and one ... |
79. problem with many-to-many bidirectional association forum.hibernate.orgHi, I've got a problem with a many-to-many bidirectional association with a join table. When I get the set |
80. Automatic bidirectional class members synchronization forum.hibernate.orgHi, sorry if this is a recurrent subject, but reading the Hibernate Docs and searching in the forum I didn't found an answer, or I'm not knowing how to search! Is there a way to let Hibernate automatically deals with the synchronization between class members of ManyToOne and OneToMany? For example: Code: @Entity class Parent { ... ... |
81. Bidirectional ManyToMany: No insert on the join table. forum.hibernate.org@ManyToMany(fetch=FetchType.EAGER) @JoinTable(name = "Project_Person", joinColumns = { @JoinColumn(name="project_id", referencedColumnName="id") }, inverseJoinColumns = { ... |
82. bidirectional one-to-many association with annotations forum.hibernate.orgAuthor Message stevewickii Post subject: bidirectional one-to-many association with annotations Posted: Thu Jul 22, 2010 2:02 pm Beginner Joined: Mon Apr 24, 2006 9:47 pm Posts: 33 Location: Kansas City, MO I am using Hibernate/Annotations 3.4.0GA. I have a User object, which has a List of Address objects. There is a bidirectional association between them. When I save a ... |
83. one-to-many bidirectional association query forum.hibernate.orgHi Folks, I have been struggling with this problem of creating a one-to-many bidirectional association on a join table. I have a scenario where one DEVICE can be associated with many NODE's and the join table I use is DEVICE_NODE. I am using hibernate tools to generate the code automatically and create the schema. On disabling the join in Device.hbm.xml, things ... |
84. Bidirectional Cascade issue forum.hibernate.org |
85. Bidirectional associations forum.hibernate.org |
86. Bidirectional Association one-to-many generate Extra query forum.hibernate.orgMapping file: |
87. Bidirectional @Any possible forum.hibernate.orgHi, I've got an @Any declaration 'parentListTile' and I want to make a bidirectional relationship to it. I was using a @OneToMany(mappedby="parentListTile") with a joined inheritance mapping but now with the @Any it's complaining about the superclass not being mapped. Is it possible to do a birdirectional mapping with @Any, I've been looking on the internet but can't find any information, ... |
88. one-to-one bidirectional association results in n+1 selects forum.hibernate.orgNewbie Joined: Thu Dec 16, 2010 4:09 pm Posts: 3 I have found a lot of threads on this but none with any resolution of the issue. Succinctly, the problem is that with one-to-one bidirectional associations Hibernate for some reason will retrieve the other end of the association individually for each entity returned, i.e. you get n+1 selects. Yuck. I'm running ... |
89. LazyInitializationExcep. & serveral bidirectional relation forum.hibernate.orgI have got 3 JPA entites: A, B and C. There exists 2 bidirectional relations: One between A and B and one between B and C. Every relation is EAGER loaded. Pseudocode looks like this: Class A: Code: @Entity @Table(name = "A") public class A { @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "parentA") private Set ... |
90. bidirectional ManyToMany mapping - unexpected behavior forum.hibernate.orgHi there! I'm pretty new in hibernate. Currently trying to follow some exapmles from the book "Hibernate Quickly". there is a section about bidirectional manyTomany mapping. I gave it a try: there are two classes that suposse to have this kind of mapping, Event and Attendee; Attendee mapping: |
91. one-to-one bidirectional association between two classes forum.hibernate.orgHow do I define a bidirectional one to one association between an abstract class and a persistent class? Please help. eg. there is an abstractClassA which has an one to one association with a persistent class. /******** PersistentClass *********/ public class PersistentClass extends TestObject { @XmlElement private AbstractClass abstract1 = null; public PersistentClass() {super(); abstract1 = (AbstractClass) new TextAbstractClass(); } public ... |
92. bidirectional one-to-many fetch problem forum.hibernate.orgNewbie Joined: Mon Jan 24, 2011 11:11 am Posts: 2 Hi, I am trying to create a bidirectional one-to-many relationship between Person and Address tables. One Address can be shared among multiple persons. Table Structure: Person Code: +-----------+------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | ... |
93. Bidirectional one-to-one save problem forum.hibernate.orgCREATE TABLE ppgcc.professor ( id_professor serial NOT NULL, nome character varying(45) NOT NULL, email character varying(45) NOT NULL, website character varying(45), usuario integer, CONSTRAINT professor_pkey PRIMARY KEY (id_professor), CONSTRAINT professor_usuario_fkey FOREIGN KEY (usuario) REFERENCES ppgcc.usuario (id_usuario) MATCH SIMPLE ... |
94. OneToOne bidirectional relation forum.hibernate.orgAssume there are two entities with OneToOne relation: Code: @Entity public class A { private long code; private B b; @Id @GeneratedValue(strategy=GenerationType.AUTO) ... |
95. Bidirectional Many-to-many mapping pitfalls forum.hibernate.orgGreetings. Forgive me if this has been asked before - I did try the local search feature and google, but neither provided an answer, so I'll just dive in. I am building an Orcale XE database to hold information about lego parts (we won't discuss how big a geek that makes me) and there is a many to many relationship between ... |
96. Bidirectional association and 2nd level cache forum.hibernate.org |
97. Having problem with a bidirectional OneToOne relationship forum.hibernate.orgI feel really stupid right now, because I am struggling with a problem with a bidirectional OneToOne relationship which is supposed to by simple to perform but I am just not understanding it because I cannot get it to work. Basically, the problem is between two tables, lets call them table A and table B. A has primary key of A_ID. ... |
98. Orphans not deleted on bidirectional association (MySql) forum.hibernate.orgOk I think I got it, the collection reference was changed. What happened is: I am using Spring MVC with Form object for UI rendering Here is flow of usage: Controller ---> get the Truck object---> copy it to the FORM object ---> render it User will edit the data ---> Data is copied to the FORM object ---> back to ... |
99. bidirectional many-to-many assoc. using a Map instead of Set forum.hibernate.orgNewbie Joined: Mon Apr 04, 2011 3:41 pm Posts: 12 I'm having a bear of a time with this and any suggestions would be greatly appreciated. I have a bi-directional many-to-many association mapping between two entities (FlashCard and Tag) that is currently successfully represented as a java.util.Set. I'd like to change the collection type to a java.util.Map. Here's an excerpt of ... |
100. One to many bidirectional with subclass mapping forum.hibernate.orgHi guys, Hibernate newbie here. I have class University with one to many relationship with class Student. Class Student has many to one with University. I'd like Student to have a many to one rel with a subset of class University's fields, not all of them. For example I'd like Student to have a University reference which contains only the id ... |
That's basically a workaround for non-disjoint inheritance which JPA doesn't support. Persons can exist by their own, but there can optionally be a ...