Is it possible to encode the absence of a relationship with a relationship in your application?
> Date: Tue, 27 Jul 2010 18:52:10 +0100 > From: alberto.perd...@gmail.com > To: user@lists.neo4j.org > Subject: [Neo4j] Querying for nodes that have no relationhip to a specfic > node > > Hi, > > I'm considering using neo4j for a current project I'm working on. > > I need to do the following periodically (e.g. daily): > * step 1: for every node, let's call it A, I need to pick n other > nodes randomly that fullfill certain attributes and have no > relationship to A. > * step2: For each of those nodes and A, I calculate some value and > store it within the relationship. > > Regarding step 1, from what I've read, it seems there is no way of > querying nodes that have no relationship to a specific node. Of course > I could query all the nodes of the database that fullfill certain > attributes, store them within a variable, then query all relationhips > for node A and then substract those nodes from the array variable. But > I think this approach won't work very well as the amount and density > of relationships gets higher... > > Do you have any recommendations? Can you suggest another strategy? > Perhaps there is a way of making that query? > > Any help of appreciated. > Alberto. > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user _________________________________________________________________ New Windows 7: Simplify what you do everyday. Find the right PC for you. http://windows.microsoft.com/shop _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
