Exactly I have googled a lot more and finally I see that getReference is the only way to do it. I was wrong because initially I thought the post was about JPA and not it was about hibernate then I found the load function. Thanks of that I could rewatched the javadoc again with another eyes and I have found this.
Thank you so much. El dt., 10 març, 2015 a les 13:11, Jean-Louis Monteiro (< [email protected]>) va escriure: > Isn't that getReference()? > This is the only standard option, isn't it? > > Pretty useful when you want to delete or to attach to a relationship > > -- > Jean-Louis Monteiro > http://twitter.com/jlouismonteiro > http://www.tomitribe.com > > On Tue, Mar 10, 2015 at 12:34 PM, Alex Soto <[email protected]> wrote: > > > Ok it was session.load which instantiate a proxy but not hit the DB. Now > I > > only need to figure out if this is possible in JPA hehehe, Thanks > > > > El dt., 10 març, 2015 a les 12:25, Alex Soto (<[email protected]>) va > > escriure: > > > > > Hi guys, > > > > > > some years ago I wrote something about JPA and how to add a new entity > to > > > a many relationship in a performance way but now I can find it. Let me > > > explain what I did. > > > > > > Let's say we have an entity A that have a many relationship to B. Now > > > let's say that I want to add a new instance of B into A and I know the > id > > > of A. > > > > > > So I have two options, the first one is finding A by id and then add > the > > B > > > entity. But this is not well performed because you are loading entity A > > > with all its relationships in memory. > > > > > > But I remember that was an operation which creates a proxied A with an > id > > > but without containing anything filled, it was like all fields where > > lazy, > > > but in this way you could do something like B.setA(proxiedA); and > save(B) > > > without loading the A document at all. > > > > > > I cannot find this post and now I cannot remember the operation. Do you > > > have any idea about what I am talking about? Maybe it was something > > related > > > to Hibernate and not JPA? > > > > > > Thank you so much. > > > > > > > > >
