Cool Ben. G: neubauer.peter S: peter.neubauer P: +46 704 106975 L: http://www.linkedin.com/in/neubauer T: @peterneubauer
Neo4j 2.0.0 - (graphs)-[:FOR]->(everyone) Kids LAN creative party in Malmö - Kidscraft ICE On Wed, Feb 12, 2014 at 1:45 PM, Ben Titmarsh <[email protected]> wrote: > Ah my mistake! Didn't qualify my match with the property that I was > matching on! This works: > > MATCH (fromCard:Card { name: {fromCardName}}),(toCard:Card{ name: > {toCardName}}) > > MERGE (fromCard:Card)-[r:DECK_INCIDENCE]->(toCard:Card) > SET r.deckCount = coalesce(r.deckCount, 0) +1 > > On Wednesday, February 12, 2014 11:56:32 AM UTC, Ben Titmarsh wrote: >> >> Hi Guys, >> >> I am aware that Neo4J doesn't have a concept of a bidirectional >> relationship and I believe that's causing me a problem when using MERGE. >> Here is my Cypher: >> >> MATCH (fromCard:Card),(toCard:Card) >> MERGE (fromCard:Card)-[r:DECK_INCIDENCE]->(toCard:Card) >> SET r.deckCount = coalesce(r.deckCount, 0) +1 >> >> So say I have a collection of 4 cards: >> "Hearts","Diamonds","Clubs","Spades" >> >> The first time I create the relationship between Hearts and Diamonds, i.e. >> Hearts -> Diamonds. However, the next time the cards are in a different >> order and when I attempt to MERGE Diamonds -> Hearts a new relationship is >> created because no relationship exists in that direction. This is not what >> I want, I need to increment the deckCount property on the relationship >> regardless of the direction and don't want to have to manage two >> relationships per card. >> >> I cannot guarantee the order of cards and in essence I need to model a >> Bidirectional Relationship. How can I achieve what I need using MERGE? >> >> Cheers, >> Ben. > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
