Hibernate many to one not updating
package com.journaldev.hibernate.util; import org.hibernate. package com.journaldev.hibernate.util; import org.hibernate.
Stale State Exception: Batch update returned unexpected row count from update ; actual row count: 0; expected: 1 at org. Application Filter Chain.internal Do Filter(Application Filter Chain.java:215) at org.apache. Application Filter Filter(Application Filter Chain.java:188) at org.apache. ) Hibernate: update collection set cust_code=null where cust_code=? Table; @Entity @Table(name="ITEMS") public class Items1 annotation to provide the column name for mapping. Transaction; import com.journaldev.hibernate.model. We will use Cart-Items scenario for our hibernate one to many mapping example.
CREATE TABLE `Cart` ( `cart_id` int(11) unsigned NOT NULL AUTO_INCREMENT, `total` decimal(10,0) NOT NULL, `name` varchar(10) DEFAULT NULL, PRIMARY KEY (`cart_id`) ) ENGINE=Inno DB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8; CREATE TABLE `Items` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `cart_id` int(11) unsigned NOT NULL, `item_id` varchar(10) NOT NULL, `item_total` decimal(10,0) NOT NULL, `quantity` int(3) NOT NULL, PRIMARY KEY (`id`), KEY `cart_id` (`cart_id`), CONSTRAINT `items_ibfk_1` FOREIGN KEY (`cart_id`) REFERENCES `Cart` (`cart_id`) ) ENGINE=Inno DB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8; Our database setup is ready, let’s move on to creating hibernate One to Many Mapping example project. Service Registry; public class Hibernate Util element for cart and we are providing column name that will be mapped with the key.
We will look into Hibernate One To Many Mapping example using Annotation and XML configuration.
In simple terms, one to many mapping means that one row in a table can be mapped to multiple rows in another table. Hibernate Util; public class Hibernate One To Many Main Hibernate Configuration loaded Hibernate service Registry created Session created Hibernate: insert into CART (total, name) values (? ) Hibernate: insert into ITEMS (item_id, item_total, quantity, cart_id) values (?
Hibernate configuration file is almost same, except that mapping element changes because we are using Classes for hibernate one to many mapping using annotation.
Now that we have seen how to implement One To Many mapping in Hibernate using XML based configurations, let’s see how we can do the same thing using JPA annotations. If you understand the xml based mapping, it’s very simple and similar.
Compare it with XML based configurations, you will find them very similar. Our test program is just like xml based configuration, we are just using the new classes for getting Hibernate Session and saving the model objects into database.