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1.  relationship in a map?    forum.hibernate.org

Page 1 of 1 [ 2 posts ] Previous topic | Next topic Author Message dune Post subject: relationship in a map? Posted: Wed Oct 12, 2005 12:09 pm Newbie Joined: Tue Oct 11, 2005 10:45 am Posts: 6 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp The ...

2. Parent/child relationship needs Hibernate.isInitialized()?    forum.hibernate.org

Author Message Neil T Post subject: Parent/child relationship needs Hibernate.isInitialized()? Posted: Thu Nov 17, 2005 10:07 am Newbie Joined: Tue Nov 15, 2005 5:41 am Posts: 16 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hi, I've run into a problem where I'm getting an exception Caused by: net.sf.hibernate.LazyInitializationException: cannot access loading collection the full stack trace ...

3. Mapping multiple One2Many relationships    forum.hibernate.org

Let's see if I'm understanding this correctly. We can ignore class B, whatever holds for the A : X relationship will hold for the B : X relationship. You have table A, with an ID; table X, with an ID and a name; and table A2X, with A's IDs and X's IDs. You want a Map in each object of ...

4. Relationship mapping    forum.hibernate.org

Hibernate version:3.1 How do you define a many-to-many relationship with additional restraints? Here is my example: Tables: People (columns - id, name, etc.), Relationship (columns - id1, id2, type_id, status, etc.), Relationship_Type (columns - type_id, type_name)) Examples of two rows in the People table: 1, john 2, paul Examples of a row in the Relationship table: 1,2,1,"inactive" Examples of a row ...

5. Mapping a db table with relationship to Hibernate mapping    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: 3.1 Mapping documents: Code between sessionFactory.openSession() and session.close(): Full stack trace of any exception that occurs: Name and version of the database you are using: The generated SQL (show_sql=true): Debug level Hibernate log excerpt: I am a Hibernate novice and was seeking help from anyone who could help me ...

6. hibernate parent/child relationship cleanup    forum.hibernate.org

Newbie Joined: Wed Jan 04, 2006 11:06 am Posts: 3 Hi all am a bit of a newbie to Hibernate and was just trying to get over an issue with 1to1 and 1toMany mappings. Just to describe system. Have simple user/role system. Consist of object model User, Role and Privilege. A User has one Role object and a Role object has ...

7. Unexpected queries in parent/child relationship    forum.hibernate.org

8. [newbie] table problems in a parent-child relationship    forum.hibernate.org

I an new to Hibernate and I am overwhelmed by what it has to offer me. I am confused and appreciate any help. this is what my hbm file looks like: Code: ...

9. how to map column if there is no relationship??    forum.hibernate.org

Hi All, I dont know how to map columns if there is no relations ship. table1 contains clientid, clientname, status,customerid table 2 contains customerid, customername i want to display table1 columns, with customer name but there is no relationship in these 2 tables. so how will u map the customer name ??? i define like these. and geter and setter private ...





10. how to define mapping if there is no relationship for tables    forum.hibernate.org

HI, I have two table. But there is no direct relationship between these tables. But First table's primary column used in second table. Like parent and child. so is there is anyway that i can define a relatioship in my mapping file eventhough there is no direct relationship. thanks in advance Balag

11. mapping one to many relationship    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hey, Very basic question, but having problems with it, I have a manufacturer class and a models class with a one to many relationship. What is the correct way to map this, with two classes? The error listed below shows that the model data is not inserted in the model table ...

12. mapping one to many relationship    forum.hibernate.org

set is in manufacturer class, where primary key is MAKER_ID, cars.models class which is the many class, has primary key MODEL_ID

13. Problem of Exclusive Relationship Mapping    forum.hibernate.org

Hi All, I got a very special case on mapping my objects. I do not know how to map them, any buddy know how to map such situation? Thanks. FoodItem table ========== foodid (PK) foodname SetMeal table ========== setmealid (PK) setmealname Price ========== priceid (PK) referno (foodid or setmealid) type (the type of the referno - FoodItem/SetMeal ) amount startdate enddate ...

14. How to best map common Parent/Child relationship?    forum.hibernate.org

Hi, In my legacy DB, we often have a parent table which has a PK from a sequnce. Then parent has one or more child tables which uses parent PK as not null FK to form composite key for child tables. From application side, Presentation tier would like to build up Parent/Child object graph and pass to server DAO in one ...

15. Relationship mapping problem    forum.hibernate.org

Newbie Joined: Tue Feb 28, 2006 5:03 pm Posts: 15 Location: North Carolina I am using hibernate 3.1.3 with jdk 1.4.2.09 hitting a Sybase ver 12.5 database. I have a network of objects that has 3 classes, A, B, and C. There is a 1 to many relationship from A to B and a 1 to 1 relationship from B to ...

16. parent/child relationship problems    forum.hibernate.org

hi follow what i put bellow and help to find what i am doing wrong i j ust try toi follow the steps in the documentation but i got a big error Hibernate version: 3.2 beta6 Mapping documents:





17. one to many or parent child relationship    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp HI All, I have searched the forum but wasn't able to find close to my requirements. I am a newbie to hibernate would greatly appreciate if any inputs on how can i go about solving this issue I have composite key based table to retrieve more like a tree structure based ...

18. How to map one-to-many relationship?    forum.hibernate.org

dekalaked, Hibernate will only update the US_State table when the instance of an Address object that you are persisting has a US_State object attached to the getStateAbbrev() field that is not in the database already. It would be helpful if you could post some code snippets of where you are creating your objects and where you are persisting them. Also, some ...

19. parent-child relationship problem    forum.hibernate.org

I have a question about object semantics and implementing parent-child relationships in Hibernate. Parent has a list of children, and Child has a reference to its parent. The problem is: the Parent's collection of children does not actually contain the Child object; it contains a copy. When I modify the Child, the same Child in Parent's collection of children does not ...

20. Mapping "code" relationships    forum.hibernate.org

Many database schemas contain "code" tables that map internal attribute values to external display strings. For instance: Code: create table CODE_OS_TYPE ( OS_TYPE varchar2(4) not null primary key, DESCRIPTION ...

21. Relationship mapping question    forum.hibernate.org

When modeling things for using with Hibernate it's useful to think about an Object model, not just tables. Here, you can define a hierarchy, both Books and Notes are Things. Thing would be a superclass. The note would have a relationship with Thing. This inheritance would be mapped in one of the standard inheritance mapping schemes Hibernate provides. E.g. like this: ...

22. Simple parent/child (1-N) relationship    forum.hibernate.org

Hello. When I declare a simple one-to-many relationship, with unidirectional relation, each child insertion performing 2 SQL statements: 1) Insert the child record with all the fields except the foreign key columns. 2) Update the foreign key columns in the child record. How can I avoid the second SQL statement ? Thanks, Yifat

23. Many-to-one relationship where parent class is same as child    forum.hibernate.org

Hibernate version: 3.1.3 Name and version of the database you are using: Oracle 10 Hi I have a question regarding how many-to-one relationship should be defined where the parent class is same type as the child class. -------------------- Person table --------------------- - name - surname - national_id - (PKey) - passport_id - (PKey) - address - parent_national_id - (Parent -PK) - ...

24. Detect loop in parent child relationship    forum.hibernate.org

25. How do I map this relationship?    forum.hibernate.org

I have a system that needs to track people and their roles on various groups and projects. For example a person could be a member on multiple projects and on any given project they could have 1 role. So they could be a member of a project on project a and a lead on project b, c and a member of ...

26. How to map a one-to-many relationship to the same entity    forum.hibernate.org

Hi all, I want to map Hibernate against one of our legacy database. I'm having trouble with one of the use case, I am not sure if Hibernate could handle this elegantly. Here is my entity class: Code: public class Person { private int id; private String name; private String departmentName; ... ...

27. mapping "optinal" one-to-one relationship    forum.hibernate.org

Hi All, I'm using Hibernate 3.2.0 and I have the following problem relating to mapping two entities: USER: - username (PK) INDIVIDUAL: - id (PK) - username (FK) Basically, a USER can map to 0 to 1 INDIVIDUALs, and an INDIVIDUAL can map to 0 to 1 USERs. So basically it's an optional one-to-one relationship (is that makes sense). I've managed ...

28. how to implement a parent child one-to-many relationship    forum.hibernate.org

hi, i'm trying to implement a parent child relationship (one-to-many) relationship between two tables using hibernate annotations in the POJOs of the two relevant tables. i'm new to this and any guidance will be helpful. say for example, my tables are "Seller" and "Items". A seller can have many items associated with it, but an Item can be associated to only ...

29. Addres and Country relationship mapping question    forum.hibernate.org

30. Mapping a table to itself having parent child relationship    forum.hibernate.org

Try this: I have created Person class. package com.shyam.bean; import java.io.Serializable; /** * @hibernate.class * @author MutchaS * */ public class Person implements Serializable { private static final long serialVersionUID = 1L; private Long id; private String name; private Person spouse; /** * @hibernate.id * @return */ public Long getId() { return id; } public void setId(Long id) { this.id = ...

31. Issues mapping relationships with natural compound keys    forum.hibernate.org

Greetings, I have been trying to resolve the following issue for some time now and after reading through the Reference docs, JP w/ Hibernate, and searching the forums I am at a loss, so here goes... All the tables in the database use natural keys (legacy schema - can't change this). I am trying to map a entity-value relationship and the ...

32. Mapping JPA Annotations/Relationships to interfaces    forum.hibernate.org

We are using Hibernate 3 with JPA and annotations. I have an interface class Scenario with two different implementations: ConcreteScenario and VirtualScenario that use single table inheritance. I have another class User and I would like to create association with Scenario, which can be one of two classes. However, when I use Scenario in the relationship, hibernate complains. How do I ...

33. one-to-one mapping on a one-to-many relationship    forum.hibernate.org

This is similar to the issue in Java Persistence with Hibernate where there is a one-to-many relationship from item to bid as well as a one-to-one relationship between them on successful bid. In section 8.1.2, "Arbitrary join conditions with formulas" the single row is identified by a single property, "SUCCESSFUL". My situation is that I also have a one-to-many relationship between ...

34. What is the correct mapping for the relationship    forum.hibernate.org

I have been trying to figure out the correct mapping for the relationship that I have to work with, still with no results. I am not able to change the database layout, but I have complete control of the hibernate mapping and java code. The following is an example of the database setup. Vendor Table - (vendorid, name) [PK: vendorid] (1, ...

35. CascadeDelete for Parent-Child-Grandchild relationship    forum.hibernate.org

I recently experienced an issue where in if I coded @org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.DELETE_ORPHAN } ) for a parent class, hibernate first tries to delete the child and grand child classes and thus throws the ORA-02292: integrity constraint violated: child record found. can somebody please let me know as to what annotation should be there for PARENET Class | | | Child Class(Joined by ...

36. Problem mapping many to many in inheritance relationship    forum.hibernate.org

Please see where I got it wrong. The error is: Could not determine type for: Person, for columns: [org.hibernate.mapping.Column(TEACHER_ID)] Hibernate version: 3.1.3 Mapping documents: Code: ...

37. Parent/child relationship    forum.hibernate.org

Newbie Joined: Tue Jan 29, 2008 6:37 pm Posts: 9 I'm trying to implement a more complex version of the Parent/child relationship that is explained in the Hibernate documentation. I have the following annotated classes: Code: // Parent class @Entity @Table(name="albums") public class Album implements Serializable { private static final long serialVersionUID = -4143935150417416554L; ...

38. Mapping a parent-child relationship on a single table    forum.hibernate.org

Is it possible to map a parent-child relationship on the same table in Hibernate? For example, In trying to save instances of this class, I was getting transient object issues. Where would it be best to put the cascade="all"? ...

39. Mapping many-to-many relationships    forum.hibernate.org

I have an entity A that have a many-to-many relationship with an entity B. In the entity A mapping, I have a bag with inverse=false In the entity B mapping, I have a bag with inverse=true When I remove an instance of entity B, I want to remove only the row in the relationship table without removing the related entity A ...

40. A real parent - child relationship    forum.hibernate.org

Hi, My question is about a real parent - child relationship, where a child has two parents, a mother and a father, and those parents has a collection of children. Both child and parent are of the same class - User. So it's references to the same class, one user is the parent, a father or a mother, to another User. ...

41. getting children from a parent-child relationship    forum.hibernate.org

Hi everybody my question is as simple to write in SQL as I write below: select parent.name, child.name, child.item_order from parent_child parent, parent_child child where parent.id = child.containerId order by 3 then, how can i get the same result with HQL of, preferibly, with Criteria API. I tried a lot of things and i have read the chapted dedicated to associations ...

42. How to map parent child relationship.    forum.hibernate.org

Author Message sachinask Post subject: How to map parent child relationship. Posted: Fri May 09, 2008 1:43 am Newbie Joined: Mon Mar 31, 2008 10:15 am Posts: 5 Hi, I am trying to map two classes Organization and employee. Organization class contains: Integer organizationId; String organizationName; Set employees=new HashSet(); int numberOfEmployees; And Employee class contains: Integer employeeId; String employeeName; ...

43. Map A CompositeUserType relationship with a many-to-one    forum.hibernate.org

how Map A CompositeUserType relationship with a many-to-one this is my Composite class Quote: public class CategoriaItems { private Item item; private Categoria categoria; private String descripcion; public Categoria getCategoria() { return categoria; } public void setCategoria(Categoria categoria) { this.categoria = categoria; } public Item getItem() { return item; } public void setItem(Item item) { this.item = item; } public String ...

44. conditional relationship mapping    forum.hibernate.org

I am using hibernate annotations and want to map a relationship on a legacy database. I have an Account table and a Person table with a ManyToMany relationship between them defined by a Role table. One of the Persons attached each account is specified as the primary owner and this is indicated by a flag on the Role table. Ideally this ...

45. Mapping a many-to-one relationship only in one side    forum.hibernate.org

Hi, I have a mapping question I would like to ask to all of you. I've read the documentation lots of times, and I have also tried to solve it by myself hundreds of times. I think it's time to try if someone can help me a bit. I'm mapping two classes. Let's say Country and City. This is a trivial ...

46. Mapping non-standard parent-child relationship    forum.hibernate.org

Hi, I can't quite work out how to map my domain model using hibernate. I have two classes (let's call them Parent and Child). As usual, there are multiple Child objects per Parent (although this multiplicity is not represented on the Parent) and each Child has one Parent. Each Parent cares about at most one Child at a time (possibly no ...

47. Hibernate Relationship Mapping Problem    forum.hibernate.org

Hi all, I have one issue in dealing with Hibernate associations. I just wanted to know that is there any drawback of using Associations by Hibernate mapping file? One of my senior is saying that there will be a lot of performance problems in using associations by Hibernate. Other approach is to use Seperate mapping class that corresponds to the table ...

48. Hibernate Relationship Mapping Problem    forum.hibernate.org

Hi all, I have one issue in dealing with Hibernate associations. I just wanted to know that is there any drawback of using Associations by Hibernate mapping file? One of my senior is saying that there will be a lot of performance problems in using associations by Hibernate. Other approach is to use Seperate mapping class that corresponds to the table ...