The best way in most cases is to actually traverse the graph via Node#getRelationships or Node#traverse... Tried it?
2010/2/1 Anton Popov <[email protected]>: > 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 < > [email protected]> 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: [email protected] [mailto:[email protected]] >> 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 <[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.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 <[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 >> >> _______________________________________________ >> 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
