Hello.

I have 5 tables:

ATRIBUTES (ID_ATRIBUTES) ->
GRAFICS_ATRIBUTES (composed ID - ID_GRAFICS, ID_ATRIBUTES) ->
GRAFICS (ID_GRAFICS, ID_NODES) ->
NODES (ID_NODES) ->
NODES_ATRIBUTES (many to many ID_NODES, ID_ATRIBUTES) ->
ATRIBUTES (ID_ATRIBUTES)

I am trying to update the table GRAFICS and the table GRAFICS_ATRIBUTES.

When I try to update some of those tables, hibernate deletes all the NODES_ATRIBUTES with the ID_ATRIBUTE used in the GRAFICS_ATRIBUTES.

I can't see what's going on... some ideas?.

Thank you very much.

I am going to explain what I am doing so maybe that way somebody can see my mistake... this has been driving me crazy the last couple of days.

I am getting a list of GRAFICS so the user can choose one.

With this GRAFIC I get all its parameters again, including a HashSet of GRAFICS_ATRIBUTES and a HashSet of NODES.

The HashSet of GRAFICS_ATRIBUTES includes at the same time a HashSet of ATRIBUTES.

The user can pickup then a NODE from the GRAFIC HashSet and add new ATRIBUTES to the GRAFICS_ATRIBUTES or edit the ones that the GRAFIC already has.

If the user decides to add a new ATRIBUTE then I et a list of them with the ID_NODE.

When the user send all the form I construct the new GRAFIC_ATRIBUTES with the new ATRIBUTES or it edits the old GRAFIC_ATRIBUTES with the new changes and I edit the GRAFIC datas.

Then when I try to update the GRAFIC, to delete all the GRAFICS_ATRIBUTES (before insert them again) it always deletes in the table NODES_ATRIBUTES every row with an ID_ATRIBUTE ready to be inserted with a GRAFIC_ATRIBUTE.

Someone can see something wrong?

I forgot to say that those HashSet are proxies, so I have to deproxy them first.
I've been reading some bugs and it seems the proxies were creating a new session, isn't it?
Maybe I have my tables in different sessions so it's causing the crash in the NODES_ATRIBUTES class?