[Seaside] Help needed for the Back button

[Avi Bryant]

On Jun 2, 2004, at 11:41 PM, Michel Bany wrote:

> Then I had the idea to check how the Back button works for the store 
> application. I discovered that it
> does not work right either, because, here too, the WAStoreCart is too 
> complex. It holds the items in a Bag
> and would therefore need a deeper copy to completely preserve its 
> state.

Actually, in this case there's no intention to have the state backtrack 
at all.  That would be a strange user experience - having put something 
in your cart, to have it disappear because you used the back button.  
In fact, the shopping cart is my usual example of state that 
*shouldn't* be backtracked.

In general, it's pretty unusual to have complex state that wants to 
backtrack - hanoi is a somewhat contrived example here.

> In my opinion, the code in restoreObject:fromSnapshot: should be moved 
> to Object>>restoreFromSnapshot:
> so that everyone is able to re-implement a consistent pair of 
> #shallowCopy/#restoreFromSnapshot: methods.

Yes, this makes sense, although I should use some more specific 
selector than #shallowCopy (perhaps #snapshot will do).

Avi