Hi! > I want to use neo4j to build a prototype of a social network > application because of his graph structure and I have a problem when I > try to filter and sort the nodes resulted from traversal. > For example - I want to show a list with members of a group filtered > by some property and ordered by another; I don't find any optimization > for filter/sort operations in neo. >
Regarding filtering, my first thought goes to using ReturnableEvaluator when using a Traverser to find nodes. The ReturnableEvaluator decides which nodes should go into the result. If you need to block traversal beyond specific nodes or at a specific depth, have a look at the StopEvalutor as well. You'll find some hints on searching in Neo4j here: http://wiki.neo4j.org/content/Design_Guide#Search The evaluators are described in the core APIdocs: http://api.neo4j.org/current/ The structure of the node space can also be used to implement your very own indexing/search stuff. You can find a practical example of that here: http://wiki.neo4j.org/content/IMDB_Search_Engine For sorting, the simplest option is to do it in your own code. HTH! /anders > Do you have some implementation suggestions? Do you think that neo4j > can be used for this kind of job? > > Thank you. > _______________________________________________ > Neo mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
