从Neo4j Cypher allShortestPaths（）中排除包含给定节点或给定关系的路径

Question

What is the best way, given the following Neo4j Cypher query, for the returned collection of paths not to contain any path that contains an Item node whose itemId is equal to “Q5”?

MATCH p=allShortestPaths( (a:Item {itemId:"Q6294"})-[*]-(b:Item {itemId:"Q359442"}) ) 
RETURN p;

Also, what is the best way, given the above query, for the returned collection of paths not to contain any path that contains a relationship whose propId is equal to “P31”?

Thanks, James Weaver

Answer 1

1. The returned collection of paths does not contain any path that contains an Item node whose itemId is equal to “Q5”:

    MATCH p=allShortestPaths( (a:Item {itemId:"Q6294"})-[*]-(b:Item {itemId:"Q359442"}) ) WHERE NONE(x IN NODES(p) WHERE x:Item AND x.itemId = "Q5") RETURN p; 

2. The returned collection of paths does not contain any path that contains a relationship whose propId is equal to “P31”:

    MATCH p=allShortestPaths( (a:Item {itemId:"Q6294"})-[*]-(b:Item {itemId:"Q359442"}) ) WHERE NONE(x IN RELATIONSHIPS(p) WHERE x.propId = "P31") RETURN p;