Hibernate many to one not updating
This is the key to mapping out a unidirectional relationship.If we were to instantiate an instance of both of these objects we would be able to determine which method).Always put inverse=”true” in your collection variable ? Now, it means “stock Daily Records” is the relationship owner, and “stock” will not maintains the relationship. When a “Stock” object is saved, Hibernate will generated two SQL insert statements. There are many Hibernate articles try to explain the “inverse” with many Hibernate “official” jargon, which is very hard to understand (at least to me). ) Hibernate: update mkyongdb.stock_daily_record set STOCK_ID=? session.begin Transaction(); Stock stock = new Stock(); Stock Code("7052"); Stock Name("PADINI"); Stock Daily Record stock Daily Records = new Stock Daily Record(); stock Daily Price Open(new Float("1.2")); stock Daily Price Close(new Float("1.1")); stock Daily Price Change(new Float("10.0")); stock Daily Volume(3000000L); stock Daily Date(new Date()); stock Daily Stock(stock); Stock Daily Records().add(stock Daily Records); session.save(stock); session.save(stock Daily Records); Transaction().commit(); 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 (? Hope i made myself [email protected] just now i changed the Phone type to list of string and hibernate is managing all the delete and update operations itself but when the list is user defined type. Hibernate proxies the entity so it can manage updates to the database (what fields have changed etc) for the entity's properties.So when you retrieve the entity, and set a new list, hibernate looses the ability to track changes for what used to be in that list.
I've got a Parent/Child relationship declared in my hibernate mappings. When I create and save a new parent that contains new child objects, I get an error: I thought adding the join information in the child mapping would let hibernate know to get the LIST_ID from the parent object ACCESS_LIST. I get the error upon executing this code: I do not want to have to manually set the LIST_ID on each of the objects in the Access List Members collection on Access List.
The other data (not a list) is updated completely fine.
Here i get the class object from the database, modify that and pass the object to @Raffaele Rossi sir just now i changed the list data rather creating a new list or adding a new list object, and hibernate deletes and updates them accordingly but when i add a new list or create a new object it repeats the same old story. I notice this is a bit old now, but FWIW, the other answer is right, you shouldn't ever set a new collection on a persistent entity retrieved by hibernate as this will create orphans as it has in your case.
JDBC4Prepared [email protected]: insert into user_roles (role, email) values ('ADMIN_ROLE', 8)] hibernate assumes that the relation is mapped based on the primary keys, hence it tries to insert the primary key value (8) of the user into the specified column (email). Just use When saveing something ensure to not create the same user role more than once.
So if you wana give an user the same role read it from the database first. You probably will create valid user roles before creating an user or update it afterwards.