1. Hibernate: one class many tables coderanch.comYes, it's possible. There's actually an example in "Hibernate: A Developer's Notebook" (well, using music tracks instead of customers, but it's about the same, really, when you think about it ) which allows for multiple comments to be associated with a single track. Simply declare a set with the second column being a string, and use that for storage of the ... |
2. One java class & Two tables Hibernate coderanch.com |
3. org.hibernate.MappingException: table refers to an unmapped class coderanch.comthis is my main class import Helper.HibernateUtil; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import org.omg.CORBA.TRANSACTION_MODE; public class Main { public static void main(String[] args) { SessionFactory sessions = new Configuration().configure().buildSessionFactory(); Session session = sessions.openSession(); try { session.beginTransaction(); Address address = new Address("OMR Road", "Chennai", "TN", "600097"); Student student1 = new Student("Eswar", address); Student student2 = new Student("Joe", address); session.save(student1); session.save(student2); session.getTransaction().commit();; ... |
4. A cure for excessive normalisation? One class many tables forum.hibernate.orgI am mapping to a schema with the Following tables Table Fuel Columns ID Name Fuel_Type_ID (which is an FK) Table Fuel_Type Columns ID Name I want to have a single class public class Fuel{ private Long id; private String name; private String fuelType; .... accessors omitted } I have looked at using the |
5. two tables, one class ? forum.hibernate.org |
6. one class - one table - how? forum.hibernate.orgI have one class MyDirectory.java which is supposed to represent something like a usual directory. Every directory might have several subdirectories. I have one database table directories. I'd like to create some objects of MyDirectory with one parent directory and a structure below, e.g.: Code: -parentDir -childDir1 -childDir2 -childDir3 Finally I'd like ... |
7. Class Per Table anything prevent me from 2 classes per table forum.hibernate.orgI wanted to generate 2 differnet kinds of Classes both mapped to the same table. Is there any thing that keeps me from doing this? ( I think not, but wanted to ask) Table Person { ID, (PK) Fname, LastName Phone, Address, } Class BriefPerson { Integer PK String LName String Phone } and Class Person { .. all columns .. ... |
8. Support for many tables to one java class. forum.hibernate.org |
9. Employee Manager Classes on same table forum.hibernate.orgIn the classic employee table as below empid (pk) Name managerid Where managerid is FK to empid. I have an employee class as below public class Employee{ private Long empid; private String firstName; private String lastName; private Employee manager; } Where there is many-to-one on manager with Employee class on managerid. So setting an already persisted employee to a new Employee ... |
10. 2 classes, one table forum.hibernate.orgI have done something like this. I have a class using multiple one-to-many to point to one class. The parent has code like: Code: /** * @hibernate.set lazy="true" where="fieldElement = 'FterEcud'" cascade="all-delete-orphan" inverse="false" * @hibernate.collection-key column="tar_id" * @hibernate.collection-one-to-many class="org.guidestar.uk.fin.hibernate.FinRevExpItem" ... |
11. How can I best use different tables for the same class? forum.hibernate.orgHello, I would like to store objects of the _same_ class to different tables, e.g. for providing some kind of containers on database level. Example: Table cars: Table with all cars. Table modified_cars: Table with copies of cars from the above table which have been modified by a user. Cars in this table will be copied back to table cars at ... |
12. one-to-many with elements of different classes/tables forum.hibernate.orgHi, In a one-to-many Object relationship, is it possible to have the many elements belong to different classes (which are mapped to different tables) ? For eg. consider a class called "com.foo.Transaction" mapped to the table "Transaction". Assume that this entity has a collection attribute called "lineitems". Now, the line items are of different types "com.foo.Discount", "com.foo.Item", "com.foo.Tax" etc. They have ... |
13. one class, two tables forum.hibernate.orgHi there, Im working with hibernate3 and I just can't get my head round this mapping that I need to do: I need to map one class to write to 2 different tables: Class: public class User { private Long id; private String username; private String password; private String role; public String getRole() { return role; } public void setRole(String role) ... |
14. Not able to set FavouriteCategoryId (One class Multi table) forum.hibernate.orgPage 1 of 1 [ 1 post ] Previous topic | Next topic Author Message avinashb Post subject: Not able to set FavouriteCategoryId (One class Multi table) Posted: Mon Jan 30, 2006 8:36 am Beginner Joined: Fri Dec 23, 2005 3:26 am Posts: 21 Need help with Hibernate? Read this first: ... |
15. Not able to set FavouriteCategoryId (One class Multi table) forum.hibernate.orgAuthor Message avinashb Post subject: Not able to set FavouriteCategoryId (One class Multi table) Posted: Mon Jan 30, 2006 8:36 am Beginner Joined: Fri Dec 23, 2005 3:26 am Posts: 21 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version:3.0.1 Mapping documents: |
16. Two tables that hold the same class. forum.hibernate.orgHi Lachlan, I have the same problem and I'm looking for a useful solution too. At the moment I'm using JAVA inheritance and @MappedSuperclass annotation to build subclasses for which I can set target table. I don't like this approch because I need to create a lot of subclasses only because I need to change the target table. What is your ... |
17. table-per-class issue forum.hibernate.orgHi, I have a question about the table-per-class hierarchy. Lets say I have AbstractClassX, AbstractClassY and AbstractClassZ. AbstractClassZ extends AbstractClassY and AbstractClassY extends AbstractClassX. Each abstract class has several concrete implementations as well. For example, there is is ConcreteClassX1, ConcreteClassX2, ConcreteClassY1, etc. Now I'm having difficulty fitting this into the hibernate mapping scheme of things. This is what I want to ... |
18. Reuse a class for many tables forum.hibernate.orgHi Guys, I'm trying to map a class called Color that contains a Set property of Color objects called interiorColors. I have this data in two separate tables that are related to each other with a many-to-many relationship, so there's a join table in there as well. I know how to handle this situation if the class type of the property ... |
19. Creating tables from Class Definitions forum.hibernate.org |
20. one class many tables forum.hibernate.org |
21. Class from Table in NamingStrategy forum.hibernate.orgHi everybody, we'are planning an modular system where every module can create his own tables. now i need a NamingStrategy that put prefixes to the tablenames depending on modulename. like: mod1_tablename mod2_tablename so it's possible to create tables with the same name in 2 modules. but to do this i need the assigned class in NamingStrategy.tableName(). has anybody an idea how ... |
22. Exclude class from table export ? forum.hibernate.org |
23. One Java Bean Class handle Two Table forum.hibernate.orgHi, >>> Can one hibernate xml file and one hibernate Java Bean class handle/retrieve records from two tables ? You will get a DuplicateMappingException if you try to map one class to two tables. Where you map ( in the same .hbm.xml file or many ) makes no difference. >>>I would appreciate much if any one give idea about merging the ... |
24. Any approach: tables-to-classes? forum.hibernate.orgHello there, my name is Andy and I am a newbie here. A quick question for some guidelines, if I may. I looked through some FAQ and Hibernate's documentation but could not find the right approach. Long story short I need to transform RDB tables to Java classes. As I was reading the first part of the tutorial, the opposite approach ... |
25. Store childdata of two classes in one table forum.hibernate.orgOption 1> Keep two id columns in C : id_A, id_B, for any row one would be null, the other pointing to the parent. Option 2> Keep Set |
26. Need Understanding : one class - many tables forum.hibernate.orgTrying to understand how to apply what I need with Hibernate. I have four tables that are related (one-to-many, many-to-many). Is it best practice to have a class per table then have a class that inherits from all of them? Can/Should I just create a class that reads/writes to all tables and somehow define this kluge into a mapping? For the ... |
27. more than one class in the same table? forum.hibernate.orgI need to do it, and i have the name of the class type in one column, but i don't know how to create that class... The table is of the father of the classes, and in one column of the type String i have the name of the child type of the class i want to create the class... Can ... |
28. Hibernate with Store procs VS Hibernate with tables,classes forum.hibernate.orgHi Everybody, I am in need of your great help.Actually I have to take a decision among hibernate with stored procs vs hibernate with entiy classes and tables. My requirement here is to achive peformance. Which way among these two ways provides good performance? and how can I prove that programatically? It would be great, if u guide me. Thanks, Ramakrishna ... |
29. How does this happen? Mixed class and tables forum.hibernate.orgConsider this hierarchy: In Java Code: Party ... |
30. one class over 2 tables forum.hibernate.org |
31. TABLE_PER_CLASS and h2database forum.hibernate.orgHi, I have some trouble with hsqldb and TABLE_PER_CLASS. I'm running Hibernate 3.3.0ga. The chunck of code that is used : Code: @Entity @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) public abstract class A { protected Long id; @Id @GeneratedValue(generator = "SEQ_A") @SequenceGenerator(name="SEQ_A", sequenceName = ... |
32. hibernate mutiple table to on java class forum.hibernate.orgHi, Could someone have a look on this. I have only one java class called InfoData. This class gets its information from different tables. Could you please explain me how |
33. Mix TABLE_PER_CLASS and SINGLE_TABLE forum.hibernate.org |
34. Class A <--> Class B from table C forum.hibernate.orgMy business object model the classic Item has a ItemDesc one-to-one association. The existing database that I have to use has the data for the two classes in the same table. Also their is no inheritance between Item and ItemDesc. I found a foreign key reference one-to-one association that said that the target could be the same table (self-referencing) but no ... |