1. JPA and Generated Key coderanch.comThanks! It seems that the generated key cannot be used without commiting a transaction first? I'm trying to insert a record then get the generated key and then update the record. But the record it seems is not being saved. I could make two different transactions and commit each but that would only rollback 1 transaction. EntityManager em = getEntityManager(); try ... |
2. Best Practices for JPA Generated Keys coderanch.comI've been working with Apache OpenJPA and a lot of what I do involves tables with generated integer keyfields. One of the problems with them is that since they're only generated when the backing store object has been created, the actual identity of the record is only available by retrieving the generated key. For brute-force batch, I've been doing this: entityManager.getTransaction().begin(); ... |
3. How Can I return the generated key with Hibernate? coderanch.comHi All, This is the code that I'm trying to convert to Hibernate. I'm fairly new to Hibernate so please bear with me. public void insertApplicationDetails(Application app) throws SQLException{ try { String appKey = dao.insertApplication(app); Module module = new Module(); module.setAppId(Integer.valueOf(appKey)); module.setModuleName(app.getAppName()); module.setModuleOverview(app.getOverview()); module.setModuleSwitch(CommonsConstants.YES); String moduleKey = dao.insertAppModuleInfo(module); ArrayList |
4. How to generate User Defined Primary Key in Hibernate coderanch.com |
5. primary key generation forum.hibernate.orgHi Guys; i am trying to insert data in a table called member which has a primary key named ID.The primary key generated from another table called next-id.how can i configure it using hibernate annotations.i am able to retrive data but while trying to insert data i am getting the following error: SEVERE: Field 'ID' doesn't have a default value org.hibernate.exception.GenericJDBCException: ... |
6. primary key generation trouble forum.hibernate.org |
7. quesiton on key generation... forum.hibernate.orgI have the need to save the primary key that is generated from my oracle sequence into another column in my database beside my promary key column. My mapping document specified the primary key attribute be generated from my sequence but i also want to store this value in another field. Any suggestions on saving the sequence-generated primary key in a ... |
8. pk generation using diferent table forum.hibernate.orgYou have to write a Generator to satisfy this condition. I did a similar one and maybe it would help Code: package com.yoyo.hibernate.idgen; import com.yoyo.CounterPersist; import com.yoyo.persistentfactory.CounterFactory; import net.sf.hibernate.HibernateException; import net.sf.hibernate.MappingException; import net.sf.hibernate.dialect.Dialect; import net.sf.hibernate.engine.SessionImplementor; import net.sf.hibernate.id.Configurable; import net.sf.hibernate.id.PersistentIdentifierGenerator; import net.sf.hibernate.type.Type; import net.sf.hibernate.util.PropertiesHelper; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import java.io.Serializable; import java.util.Properties; /** * Generates Sequence numbers for individual entities. * A ... |
9. Many-to-many with link table. Primary key generation forum.hibernate.orgNewbie Joined: Fri Nov 26, 2004 2:59 am Posts: 5 Hibernate version: 2.1.6 Mapping documents: |
10. Keys generation strategy forum.hibernate.orgHibernate version: 2.17 Name and version of the database you are using: MS SQLServer 2000 To generate keys we use a table SYSTEM_KEYS. CREATE TABLE [dbo].[SYSTEM_KEYS] ( [KEY_CODE] [T_LONG_NAME] NOT NULL , [NEXT_KEY] [T_IDENTIFIER] NULL ) ON [PRIMARY] GO ALTER TABLE [dbo].[SYSTEM_KEYS] WITH NOCHECK ADD CONSTRAINT [PK_SYSTEM_KEYS] PRIMARY KEY NONCLUSTERED ( [KEY_CODE] ) ON [PRIMARY] GO The key_code column specify the ... |
11. problem with primary key generation forum.hibernate.orgHibernate version:2.1.6 Mapping documents: |
12. Foreign Key generation not happening for Sets in Hibernate3 forum.hibernate.orgI trying to generate a schema from my hibernate mapping, and in general it is work well, but there is at least one notable exception. There is a set of objects that are mapped through a 3 table. The tables are created correctly, but no foreign keys are generated for this. Am I missing something or should I logged this as ... |
13. to generate formular primary key forum.hibernate.orgI have a table named "test" under DB2 table test id identity integer aid formular 'a'||char(id) parmary key name character(10) when I ran the sql follows: insert into test(name) values('name') if id is generated to 2,the column must be 'a2' column id is not exist in my hbm file now(because it is identitied).Here is my hbm file: |
14. prostgres foreign-key generation not working? forum.hibernate.org |
15. problem of generating a primary key forum.hibernate.orgHibernate: select GDW2.HIBERNATE_UNIQUE_KEY.nextval from dual 20:07:17,307 WARN JDBCExceptionReporter:71 - SQL Error: 2289, SQLState: 42000 20:07:17,307 ERROR JDBCExceptionReporter:72 - ORA-02289: serial(number) does not exist org.hibernate.exception.SQLGrammarException: could not get next sequence value at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:65) |
16. primary key generation forum.hibernate.orgHibernate version: 3.1 Name and version of the database you are using: Oracle 9 Hi all, My web application uses Mysql and runs fine.. but now i have to migrate it to oracle for some reason. for every table i have used |
17. one-to-one generates redundant foreign key? forum.hibernate.orgHi all, It seems to me that bidirectional |
18. Require your help : Primary key generation forum.hibernate.orgHibernate version: 3.1.3 We have a distributed system with operations in different locations. All of them use their local servers and database (MySQL). All these different systems need to synchronize their data with the central database every night. This means that the primary keys generation cannot be a simple identity strategy as it would result in conflicts. We are considering what ... |
19. Foreign key generation forum.hibernate.orgHi everybody! I have a general (stupid?) question about the assosiations weithin hibernate. I use hibernate with my IDs mostly assigned. Dont know but that might be important for the question. Say I have to Tables: PERSON and PHONE_NUMBER. PERSON consits out of an id (PK) and name. PHONE_NUMBER consits out of a phone number(PK) an a person_Id (PK,FK). The assoiation ... |
20. problems with generated foreign keys forum.hibernate.orgAuthor Message klemensl Post subject: problems with generated foreign keys Posted: Mon Dec 18, 2006 9:06 am Beginner Joined: Wed Dec 13, 2006 10:39 am Posts: 26 hello! following class structrure: two classes 'ReqTest' and 'TRefTest', both subclasses of 'ProjectPersModelWithCreation' (in this example both classes are equal). both classes have a set of 'ModelCoverage' and this class references the ... |
21. Combining different primary key generation mechanisms forum.hibernate.orgOur application uses the HiLo key generation to generate primary keys in the database. A plugin to our app doesn't want to use hibernate to talk to the database (just using plain old SQL). The problem is with the primary key generation, where there is a possibilty that primary keys will clash. I'm not very familiar with how the HiLo generation ... |
22. ...must be run before the generated keys are available ? forum.hibernate.orgNewbie Joined: Thu May 03, 2007 4:32 pm Posts: 3 I am having the same issue as js001. The triggers I am using work fine when I use them with straight JDBC. However when using Hibernate, I get the error: com.microsoft.sqlserver.jdbc.SQLServerException: The statement must be run before the generated keys are available. The table on which I am inserting a row ... |
23. Generation of Primary Key fails forum.hibernate.org |
24. Generating Primary Key Outside Hibernate forum.hibernate.orgHi, Hibernate version: 2.8.1 Name and version of the database you are using: Oracle 8i I have a requirement to generate the primary key ID in my code before Hibernate is called to auto-generate it. How do I achieve this? The way I understand, following is specified in mapping for hibernate to generate the primary key: |
25. Wrong foreign key is generated forum.hibernate.orgHello, I do not know if my mapping is wrong or if this is a bug in Hibernate. I use the following mapping with a bidirectional one-to-many/many-to-one association. Code: |
26. How to ignore foreign keys with 'Hibernate code generation'? forum.hibernate.org |
27. Problem with primary key generation forum.hibernate.org |
28. howto generate a primary key only if none is assigned? forum.hibernate.orgIs it somehow possible to tell Hibernate to override the primary key generated by a sequence on some condition? For example i have an entity with this primary key - int: @GeneratedValue(strategy = GenerationType.SEQUENCE,generator="pk_seq") private Integer id; normally im perfectly happy with this, so I can create objects and call: session.save(Object); and hibernate creates the primary key. but now i want ... |