[Medialibrary-devel] ML2 model

[Davy O. <od...@so...>]

I got a problem with the model File -- Media=20

In the parent File, when adding a subfile named file :

File (file) <--> Parent (this) <--> Media (this.media)

this.media.add(file); is incorrect. It provokes a =
TransientObjectException when inserterd
Since it adds File to the Set files, File (file) <--> Media (this.media)
when we flush the Media, Hibernate could flush the File before its =
Parent.
But the File.getParent() is transient (not already flush), and it leads =
to a TransientObjectException
So it is recommended that only root files are added in the =
Media.getFiles() Set.
Then getFiles() is not implemented by a HashSet (files should remain =
null), but by a hibernate query.
Only rootFiles should be a HashSet, and it is through rootFiles that the =
media will be flushed.
And then recursively, the parents will flush the files.

Consequences :=20
- we must store in media only a Set of rootFiles, no all the files.
- we should delete media.getFiles() from the bean and only keep =
media.getRootFiles();
- If one wants to access to all the files, then we will create a method =
Navigation.getAllFiles(media), which execute the right SQL query (fast, =
since we have the media id in each file).

olive