I was thinking more in the line of node.delete() //does not delete if there are relationships node.delete(true) // deletes the node including relationships. But again no big deal, is already good the way it is
2010/2/10 Mattias Persson <matt...@neotechnology.com>: > Hmm, maybe I didn't answer your question... you were wondering about > automatically deleting all relationships on a node in Node.delete() > right? Well, I don't know if Neo4j will support that or not, but we > made the decision not to have it since it's good to be as explicit as > possible so that potential code bugs aren't hidden, but instead > surfaces as early as possible. > > 2010/2/10 Mattias Persson <matt...@neotechnology.com>: >> I don't think that's a very good idea to have as a default behaviour >> since potentially the entire graph is interconnected (and that it >> isn't just a tree structure), deleting one node could potentially >> delete the entire database. >> >> We could however have some kind of utility where you specify criterias >> to traverse and delete, but then again you could probably use the >> traverser api for that. >> >> Does that make enough sense to you? >> >> 2010/2/10, Raul Raja Martinez <raulr...@gmail.com>: >>> 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 <matt...@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 <rrlever...@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 >>>>>> _______________________________________________ >>>>>> Neo mailing list >>>>>> User@lists.neo4j.org >>>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>> >>>>> _______________________________________________ >>>>> Neo mailing list >>>>> User@lists.neo4j.org >>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>> >>>> >>>> >>>> -- >>>> Mattias Persson, [matt...@neotechnology.com] >>>> Neo Technology, www.neotechnology.com >>>> _______________________________________________ >>>> Neo mailing list >>>> User@lists.neo4j.org >>>> https://lists.neo4j.org/mailman/listinfo/user >>>> >>> >>> >>> >>> -- >>> Raul Raja >>> _______________________________________________ >>> Neo mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >> >> >> -- >> Mattias Persson, [matt...@neotechnology.com] >> Neo Technology, www.neotechnology.com >> > > > > -- > Mattias Persson, [matt...@neotechnology.com] > Neo Technology, www.neotechnology.com > _______________________________________________ > Neo mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Raul Raja _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
