Hibernate onetomany not updating

07-Jun-2020 06:06

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What’s nice about using a query is that you can paginate it any way you like so that, if the number of child entities grows with time, the application performance is not going to be affected.

@Entity public class Location { @Id @Generated Value(strategy = Generation Type.

association links two tables based on a Foreign Key column so that the child table record references the Primary Key of the parent table row.

As straightforward as it might be in a RDBMS, when it comes to JPA, the annotation allows you to map the Foreign Key column in the child entity mapping so that the child has an entity object reference to its parent entity.

DROP TABLE IF EXISTS `stock`; CREATE TABLE `stock` ( `STOCK_ID` int(10) unsigned NOT NULL AUTO_INCREMENT, `STOCK_CODE` varchar(10) NOT NULL, `STOCK_NAME` varchar(20) NOT NULL, PRIMARY KEY (`STOCK_ID`) USING BTREE, UNIQUE KEY `UNI_STOCK_NAME` (`STOCK_NAME`), UNIQUE KEY `UNI_STOCK_ID` (`STOCK_CODE`) USING BTREE ) ENGINE=Inno DB AUTO_INCREMENT=34 DEFAULT CHARSET=utf8; DROP TABLE IF EXISTS `mkyongdb`.`stock_daily_record`; CREATE TABLE `mkyongdb`.`stock_daily_record` ( `RECORD_ID` int(10) unsigned NOT NULL AUTO_INCREMENT, `PRICE_OPEN` float(6,2) DEFAULT NULL, `PRICE_CLOSE` float(6,2) DEFAULT NULL, `PRICE_CHANGE` float(6,2) DEFAULT NULL, `VOLUME` bigint(20) unsigned DEFAULT NULL, `DATE` date NOT NULL, `STOCK_ID` int(10) unsigned NOT NULL, PRIMARY KEY (`RECORD_ID`) USING BTREE, UNIQUE KEY `UNI_STOCK_DAILY_DATE` (`DATE`), KEY `FK_STOCK_TRANSACTION_STOCK_ID` (`STOCK_ID`), CONSTRAINT `FK_STOCK_TRANSACTION_STOCK_ID` FOREIGN KEY (`STOCK_ID`) REFERENCES `stock` (`STOCK_ID`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=Inno DB AUTO_INCREMENT=36 DEFAULT CHARSET=utf8; package com.mkyong; import

Hibernate Util; public class App Hibernate one to many (XML Mapping) Hibernate: insert into mkyongdb.stock (STOCK_CODE, STOCK_NAME) values (? ) Hibernate: insert into mkyongdb.stock_daily_record (STOCK_ID, PRICE_OPEN, PRICE_CLOSE, PRICE_CHANGE, VOLUME, DATE) values (?

Constraint Violation Exception: Validation failed for classes [com.saagie.picsaagie2017_frontend.domain.

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Jpa Transaction Commit(Jpa Transaction Manager.java:526) [] t org.hibernate.internal.

The same logic applies to collection state modifications, so when removing the firsts entry from the child collection: Again, the parent entity state change is executed first, which triggers the child entity update.

Afterward, when the collection is processed, the orphan removal action will execute the child row delete statement.

NONSTRICT_READ_WRITE) public class Hyper Parameter implements Serializable I update a json and try a put with it .

I change the value of the field parametervalue from 2 to 3 . Transaction System Exception: Could not commit JPA transaction; nested exception is javax.persistence.

As I explained in my book, many times, you are better off replacing collections with a query, which is much more flexible in terms of fetching performance.