Patrik Nordwall wrote:
>
> I think the solution for this problem is to use cascade="none" for the
> item reference in SequencedItem.
>
> ValueObject SequencedItem {
> - @ItemSet itemSet <-> seqItems
> Integer sequence range="min=1"
> - @Item item cascade="none"
> }
>
> /Patrik
>
Thanks Patrick this works well - and my apologies for not replying sooner,
i've been held back from sculptor for a period but now able to get back into
it. With luck i'll be given enough time now to complete pilot site.
Note a related problem that I'm now pondering though is whats the best
strategy for dealing with user attempts to remove a referenced Item while
its still participating in a one-way relationship (like the non-cascaded one
in this example)? I've read the sculptor guide re adding validation and had
figured it'd be wise to include a custom validation method annotated with
@preremove to check that the Item wasn't in use .. but then realised i'd
have no relationship to check and seems i can't do the validation from that
entity itself ie. given that the Item is oblivious to what other objects
point at it.
Is there a neat way to handle this in sculptor to prevent users getting an
SQLException: Integrity constraint violation? I'm just wanting to return a
val msg saying something like "Item cannot be removed whilst referenced
elsewhere"
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