[Neo] bug in Node.delete() ?

Raul Raja Martinez raulraja at gmail.com
Wed Feb 10 07:43:49 CET 2010


Any plans to support cascade deletion?
We currently have some cases where we have to manually iterate over
the relationships and remove them.
Not a big deal because we wrap many other operations but something
that would nice to have out of the box.

2010/2/9 Mattias Persson <mattias at neotechnology.com>:
> Yep, that's right... The documentation is a bit unclear/untrue about
> that. Ryan is right in that it's only checked when the transaction is
> commited. This means that you can delete a node which has
> relationships on it, just as long as you delete its relationships
> before the transaction is committed.
>
> 2010/2/9, Ryan Levering <rrlevering at gmail.com>:
>> Well, it's not totally untrue.  Try changing your tx.failure() to
>> tx.success() and you'll get the error you're looking for.  Neo is a fairly
>> transaction driven database and I imagine it doesn't check the constraints
>> of the delete until it's committed.
>>
>> On Feb 9, 2010, at 3:28 PM, Stefan Armbruster wrote:
>>
>>> Hi,
>>>
>>> it looks like Node.delete() does not behave as defined in the API docs:
>>> <quote>
>>> Deletes this node if it has no relationships attached to it. If delete()
>>> is invoked on a node with relationships, an unchecked exception will be
>>> raised. Invoking any methods on this node after delete() has returned is
>>> invalid and will lead to unspecified behavior.
>>> </quote>
>>>
>>> I've created some sample code (http://pastebin.com/f2918f9d5)
>>> demonstrating this. Line 25 tries to delete a node with a relationship
>>> attached to it. There's no exception (as expected from the API docs) and
>>> the node is still there afterwards. So delete() seems to do simply
>>> nothing if there are any realtionships.
>>>
>>> Did I miss something or should we consider this a bug?
>>>
>>> Regards,
>>> Stefan
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>>
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>
>
> --
> Mattias Persson, [mattias at neotechnology.com]
> Neo Technology, www.neotechnology.com
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-- 
Raul Raja


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