2010/1/29 Anton Popov <popov.ua.w...@gmail.com>: > 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? No you can't and "setting your own ids" shouldn't be misused since the id of a node is actually relative to where in the file (on disc) it is located. So by spreading ids and "misusing" the id space you could end up having very large store files where most of it is wasted space.
What is your particular use case for indexing relationships? Maybe you could get some tips on modelling it in some other way here on the mailing list if you asked! > > ---------- 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.html and >> >> >> >> 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 > -- Mattias Persson, [matt...@neotechnology.com] Neo Technology, www.neotechnology.com _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
