description and references refresh when editing

Hi,[re ;-)] with the same case : ---------------------------------------------------- An object A have a collection of objects B. each object B have a collection of objects C, and finnaly each object C have an attribute wich references an object B take in the collection of A. A 1<=>* B 1<=>* C 1<=>1 B among the Collection of A- ----------------------------------------------------- When I edit with seaside components an object A and if I add object B I need to save A to be able to use B objects, recently added, with C objects. May be clearer : Steps 1/ I edit A object 2/ I add B objects to the collection in A 3/ When creating B objects I want to add C objects 4/ When creating C objects ... the list of B objects in the object A is not already update and I have to previously save A to use the collection... I believe my probleme is due to the memento pattern used when creating A object... May be I need to commit A memento ? Thanks for your help Florent.