Hibernate manytoone not updating


That is we need to define the parent class dependency (parent class reference variable) in child class.

The operations (Save, Update, Delete) should be performed from the child class only.

This example explains you how to map the many to one relationship with hibernate.

SQL] (default task-2) insert into Employee (dept_id, first Name, last Name, pos, id) values (? Basic Binder] (default task-2) binding parameter [5] as [BIGINT] - [3] ,720 DEBUG [org.hibernate. Basic Binder] (default task-2) binding parameter [4] as [INTEGER] - [null] ,721 TRACE [org. Basic Binder] (default task-2) binding parameter [2] as [BIGINT] - [2] ,723 DEBUG [org.hibernate. Basic Extractor] (default task-8) extracted value ([dept Name2_0_0_] : [VARCHAR]) - [Finance] ,016 TRACE [org. Basic Binder] (default task-8) binding parameter [3] as [VARCHAR] - [Doe] ,023 TRACE [org. Basic Binder] (default task-8) binding parameter [1] as [INTEGER] - [0] ,024 TRACE [org. Basic Binder] (default task-6) binding parameter [1] as [INTEGER] - [3] ,764 TRACE [org. Basic Binder] (default task-14) binding parameter [1] as [INTEGER] - [1] ,436 TRACE [org.

SQL] (default task-2) insert into Employee (dept_id, first Name, last Name, pos, id) values (? Basic Binder] (default task-2) binding parameter [5] as [BIGINT] - [4] ,721 DEBUG [org.hibernate. Collection Type] (default task-8) Created collection wrapper: [org.nailedtothex.jpatest.ordercolumn. SQL] (default task-8) select nextval ('hibernate_sequence') ,022 DEBUG [org.hibernate. Basic Binder] (default task-8) binding parameter [4] as [INTEGER] - [null] ,023 TRACE [org. Basic Binder] (default task-8) binding parameter [2] as [BIGINT] - [1] jpatest=# select * from dept; id | deptname ----- ---------- 101 | Finance (1 row) jpatest=# select * from employee ; id | firstname | lastname | pos | dept_id ----- ----------- ---------- ----- --------- 201 | Taro | Yamada | 0 | 101 202 | Jiro | Suzuki | 1 | 101 203 | Saburo | Tanaka | 2 | 101 1 | Jane | Doe | 0 | 101 (4 rows) jpatest=# ,748 DEBUG [org.hibernate. Basic Binder] (default task-6) binding parameter [1] as [BIGINT] - [101] ,760 TRACE [org. Basic Binder] (default task-6) binding parameter [1] as [INTEGER] - [2] ,763 TRACE [org. Basic Binder] (default task-6) binding parameter [2] as [BIGINT] - [1] jpatest=# select * from employee ; id | firstname | lastname | pos | dept_id ----- ----------- ---------- ----- --------- 201 | Taro | Yamada | 0 | 101 202 | Jiro | Suzuki | 1 | 101 203 | Saburo | Tanaka | 2 | 101 1 | Jane | Doe | 3 | 101 (4 rows) jpatest=# ,429 DEBUG [org.hibernate. Basic Binder] (default task-14) binding parameter [1] as [INTEGER] - [0] ,436 TRACE [org. Basic Binder] (default task-14) binding parameter [2] as [BIGINT] - [203] ,439 DEBUG [org.hibernate.

SQL] (default task-2) select nextval ('hibernate_sequence') ,706 DEBUG [org.hibernate. Basic Binder] (default task-2) binding parameter [2] as [VARCHAR] - [Taro] ,717 TRACE [org. Basic Binder] (default task-2) binding parameter [1] as [BIGINT] - [1] ,719 TRACE [org.

SQL] (default task-2) select nextval ('hibernate_sequence') ,712 DEBUG [org.hibernate. Basic Binder] (default task-2) binding parameter [1] as [VARCHAR] - [Finance] ,714 TRACE [org. Basic Binder] (default task-2) binding parameter [3] as [VARCHAR] - [Yamada] ,717 TRACE [org. Basic Binder] (default task-2) binding parameter [2] as [VARCHAR] - [Jiro] ,719 TRACE [org. Basic Binder] (default task-2) binding parameter [1] as [BIGINT] - [1] ,720 TRACE [org. Basic Binder] (default task-2) binding parameter [1] as [INTEGER] - [2] ,724 TRACE [org.

We kicked off our hunt for JPA implementation patterns with the Data Access Object pattern and continued with the discussion of how to manage bidirectional associations.