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.
