[Neo] [Neo tickets] #93: IMDB application 1.1
anders at neotechnology.com
Thu Jan 29 13:32:55 CET 2009
Tobias Ivarsson wrote:
> I would like raise the questions in this ticket comment to the mailing list.
Thanks for doing so!
>> I know that there's delete() on both nodes and relationships but I can't
>> figure out whether I need to call both or calling delete() on node will
>> handle the deletion of its relationships as well. I can still retrieve
>> either node or relationship by their ID even after calling their delete
> Before the transaction where the node/relationship was removed is committed
> it is very possible to retrieve them. And it should be, they are still alive
> in other threads.
Maybe it's a bit more complicated. From the Node.delete() JavaDocs:
> Deletes this node. Invoking any methods on this node after |delete()|
> has returned is invalid and will lead to unspecified behavior.
I think invoking methods on the node in other threads should be fine, as
long as the change wasn't committed. (same goes for relationships)
> It is important to notice that a node that has relationships cannot be
> removed, so the relationships need to be removed first.
Then this should be added to the JavaDocs, I can't find it there.
>> There should be a mention of what happens to island graphs, are they lost
>> in Neo forever?
> You can still access these by ID. So if they have references stored in an
> index they are very much accessible, this is also a very common case.
I'll add this to the IMDB exemple, and will look for where to add it in
other documentation as well.
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