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 <[email protected]> Date: 2010/1/29 Subject: Re: [Neo] Relation properties To: Neo user discussions <[email protected]> Hello Mattias, Got it. Thanks. Is there any RoadMap available? 2010/1/29 Mattias Persson <[email protected]> Unfortunately you cannot index Relationships, but it's a (frquently > requested) feature we're planning to add. > > 2010/1/29 Anton Popov <[email protected]>: > > 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 <[email protected]> > > > >> Not at all, you're not the first one to overlook that inheritance! > >> > >> 2010/1/28, Anton Popov <[email protected]>: > >> > 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 <[email protected]> > >> 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 <[email protected]>: > >> >> > 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 > >> >> > [email protected] > >> >> > https://lists.neo4j.org/mailman/listinfo/user > >> >> > > >> >> > >> >> > >> >> > >> >> -- > >> >> Mattias Persson, [[email protected]] > >> >> Neo Technology, www.neotechnology.com > >> >> _______________________________________________ > >> >> Neo mailing list > >> >> [email protected] > >> >> https://lists.neo4j.org/mailman/listinfo/user > >> >> > >> > > >> > > >> > > >> > -- > >> > Best regards, > >> > Popov Anton > >> > _______________________________________________ > >> > Neo mailing list > >> > [email protected] > >> > https://lists.neo4j.org/mailman/listinfo/user > >> > > >> > >> > >> -- > >> Mattias Persson, [[email protected]] > >> Neo Technology, www.neotechnology.com > >> _______________________________________________ > >> Neo mailing list > >> [email protected] > >> https://lists.neo4j.org/mailman/listinfo/user > >> > > > > > > > > -- > > Best regards, > > Popov Anton > > _______________________________________________ > > Neo mailing list > > [email protected] > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > -- > Mattias Persson, [[email protected]] > Neo Technology, www.neotechnology.com > _______________________________________________ > Neo mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > -- Best regards, Popov Anton -- Best regards, Popov Anton _______________________________________________ Neo mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
