Hibernate many to one not updating

Posted by / 12-Nov-2017 04:25

If we were to instantiate an instance of both of these objects we would be able to determine which method).This is the meaning of a unidirectional relationship. Now, if we wanted to make this relationship a bidirectional one, we would need to add the aforementioned method…

Stock stock = new Stock(); Stock Daily Record stock Daily Records = new Stock Daily Record(); //set the stock and stock Daily Records data stock Daily Stock(stock); Stock Daily Records().add(stock Daily Records); session.save(stock); session.save(stock Daily Records); Hibernate: insert into mkyong.stock (STOCK_CODE, STOCK_NAME) values (? ) Hibernate: insert into mkyong.stock_daily_record (STOCK_ID, PRICE_OPEN, PRICE_CLOSE, PRICE_CHANGE, VOLUME, DATE) values (? Both are totally different notions, see the differential here.

You need to loop all the ‘stock Daily Records’ and delete it one by one.

In this example, if a ‘Stock’ is deleted, all its referenced ‘stock Daily Records’ should be deleted from database as well.

) Stock stock = new Stock(); Stock Daily Record stock Daily Records = new Stock Daily Record(); //set the stock and stock Daily Records data stock Daily Stock(stock); Stock Daily Records().add(stock Daily Records); session.save(stock); Hibernate: insert into mkyong.stock (STOCK_CODE, STOCK_NAME) values (? ) Hibernate: insert into mkyong.stock_daily_record (STOCK_ID, PRICE_OPEN, PRICE_CLOSE, PRICE_CHANGE, VOLUME, DATE) values (? How about if you just want to delete two referenced ‘stock Daily Records’ records? You need to delete the ‘stock Daily Records’ one by one.

Query q = session.create Query("from Stock where stock Code = :stock Code "); Parameter("stock Code", "4715"); Stock stock = (Stock)q.list().get(0); for (Stock Daily Record sdr : Stock Daily Records()) session.delete(stock); In above cascade delete option, if you delete a Stock , all its referenced ‘stock Daily Records’ will be deleted from database as well.

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but I don’t want to focus on bidirectional relationships just yet.

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