table « ID « JPA Q&A

1. Java/Hibernate JPA: InheritanceType.TABLE_PER_CLASS and IDs    stackoverflow.com

I'm using Hibernate JPA. Suppose I have these classes:

AbstractPerson
|--> ConcreteEmployee
|--> ConcreteCustomer

2. table with an fk that allows none existing id using hibernate    coderanch.com

so basically i have this table that requires me to input the id of another table, wherein the values of for those id's does not exist yet. i'm not quite sure how to implement this with hibernate but i have a few thoughts on how it should work. the first is i forgo the fk and just force the application to ...

3. reference to two tables for id    forum.hibernate.org

Hey guys, I've the following problem. I've got one Java-Class name Ausleihe with three primary keys from three different tables. Now I dont't know how I can get the reference in the xml file for id. in the moment i have this code. And I need the two references between the id tags. Does anyone know how to resolve my problem. ...

4. Getting the last (integer) id from a table    forum.hibernate.org

Hi, this is a very easy question, but I don't seem to get it anyway. I have table representing a SalesLineItem class, the table's name is saleslineitem and is shown here below: create table saleslineitem ( id int not null auto_increment primary key, price double, total double, code text, qty int, name text, description text ); My question is, how to ...

5. is id necessary for every table    forum.hibernate.org

Hi all, Is it necessary to have id column in every table having generator class as" increment","uuid.hex" etc.Doing in this way we are adding an extra column in the table. But if we use generator class as "assigned" then we can make a column of the table as primary key.So in this case there is no extra column is getting added. ...

6. use TABLE_PER_CLASS mit same data-id    forum.hibernate.org

Session s = getSession(); Transaction tx = s.beginTransaction(); OrderA orderA = new OrderA(); orderA.setId(1L); orderA.setName("Name of the order A"); ...

7. Autogenerated IDs with master-detail tables    forum.hibernate.org

I have the following scenario: I have a master table and detail tabls. The detail table has the master's PK as a Foreign Key and both tables PKs are auto generated fields. I'm planning to map the relation between both tables as a cascade="save-update", so how does hibernate work with this? Does it saves first the master table, retrieves the auto ...

8. Better manner to implement it? (custom id + log table)    forum.hibernate.org

9. probleme pour genere une id d une table qui ne contient pas    forum.hibernate.org

Hello I will like to map a table that doesn t have a primary key So there is no id column and no values d'apres la faq java.developpez.com/faq/hibernate s est possible avec Code: Donc je l ai code et jobtiens ...