Hello Rick, I've tried to set my own ID to be able to quickly find my relations, because of unavailable relation indexing functionality. As far as I can see I will make changes to LuceneIndex.
On 29 January 2010 17:48, Rick Bullotta < rick.bullo...@burningskysoftware.com> wrote: > Why do you need to set your own ID's? You can use the relationship's > built-in as your index key (it is guaranteed to be unique) and > getRelationshipByID to retrieve the relationship. You'd need to very > slightly extend the LuceneIndex stuff to deal with relationships, but it > shouldn't be difficult. > > -----Original Message----- > From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] > On > Behalf Of Anton Popov > Sent: Friday, January 29, 2010 9:31 AM > To: Neo user discussions > Subject: Re: [Neo] Relation properties > > And as far as I can see there is no way to set my own id'es for Relations? > Only Nodes has such functionality - am I right? > > ---------- Forwarded message ---------- > From: Anton Popov <popov.ua.w...@gmail.com> > Date: 2010/1/29 > Subject: Re: [Neo] Relation properties > To: Neo user discussions <user@lists.neo4j.org> > > > Hello Mattias, > > Got it. Thanks. > Is there any RoadMap available? > > 2010/1/29 Mattias Persson <matt...@neotechnology.com> > > Unfortunately you cannot index Relationships, but it's a (frquently > > requested) feature we're planning to add. > > > > 2010/1/29 Anton Popov <popov.ua.w...@gmail.com>: > > > Hello everybody, > > > > > > A related question is can I index both Nodes & Relations? > > > As I can see LuceneIndexBatchInserter.index( long node, String key, > > Object > > > value ) applies for Nodes only. > > > > > > 2010/1/28 Mattias Persson <matt...@neotechnology.com> > > > > > >> Not at all, you're not the first one to overlook that inheritance! > > >> > > >> 2010/1/28, Anton Popov <popov.ua.w...@gmail.com>: > > >> > Thanks for a quick answer, Mattias. > > >> > > > >> > Sorry for a stupid questions, just haven't noticed the inheritance > of > > >> > Relationship interface. > > >> > > > >> > On 28 January 2010 19:43, Mattias Persson < > matt...@neotechnology.com> > > >> wrote: > > >> > > > >> >> Relationship has all the property methods, just like Node... > they're > > >> >> actually on PropertyContainer (a common super interface to Node and > > >> >> Relationship) see > > >> >> http://api.neo4j.org/current/org/neo4j/graphdb/Relationship.htmland > > >> >> > > http://api.neo4j.org/current/org/neo4j/graphdb/PropertyContainer.html > > >> >> for more information. > > >> >> > > >> >> So to manage the cost in a dijkstra algorithm you can use whatever > > >> >> property key, f.ex. "weight", like this: > > >> >> > > >> >> Relationship rel = ... // any relationship > > >> >> rel.setProperty( "weight", 4 ); > > >> >> > > >> >> And if you're using the Dijkstra algorithms in the > "neo4j-graph-algo" > > >> >> component, http://components.neo4j.org/neo4j-graph-algo/ , you can > > >> >> instantiate it with a CostEvaluator instance something like this: > > >> >> > > >> >> new CostEvaluator<Integer>() > > >> >> { > > >> >> CostType getCost( Relationship relationship, boolean > backwards > > ) > > >> >> { > > >> >> / TODO Handle backwards flag? > > >> >> return ( Integer ) relationship.getProperty( "weight", 1 > > ); > > >> >> } > > >> >> } > > >> >> > > >> >> ...and pass it to your Dijkstra algo instance. > > >> >> > > >> >> Is this what you were looking for? > > >> >> > > >> >> 2010/1/28 Anton Popov <popov.ua.w...@gmail.com>: > > >> >> > Hello everyone, > > >> >> > > > >> >> > Is there any possibility to assign properties to Relations? > > >> >> > The matter is I want to try Dijkstra algorithm performance on > some > > >> >> weighted > > >> >> > directed graph and don't know where to put weight actually... > > >> >> > > > >> >> > -- > > >> >> > Best regards, > > >> >> > Popov Anton > > >> >> > _______________________________________________ > > >> >> > 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 > > >> >> > > >> > > > >> > > > >> > > > >> > -- > > >> > Best regards, > > >> > Popov Anton > > >> > _______________________________________________ > > >> > 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 > > >> > > > > > > > > > > > > -- > > > Best regards, > > > Popov Anton > > > _______________________________________________ > > > 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 > > > > > > -- > Best regards, > Popov Anton > > > > -- > Best regards, > Popov Anton > _______________________________________________ > 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 > -- Best regards, Popov Anton _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
