Neo4J Java API getRelationships不会返回所有关系

Question

Edit: see comment and ignore this question

I have a Neo4J plugin with this code:

enum VrtrackRelationshipTypes implements RelationshipType { created_for }
Direction in = Direction.INCOMING;

System.out.println("will get nodes created_for study with node id " + study.getId());
int count = 0;
for (Relationship slRel: study.getRelationships(VrtrackRelationshipTypes.created_for, in)) {
    count++;
}
System.out.println(count);

Which returns:

will get nodes created_for study with node id 1453769

3445

However, using the web frontend and some cypher:

match (n)-[:created_for]->(m) where id(m) = 1453769 return count(distinct(n))

Returns:

3631

How can this be?

Answer 1

In on place you counted all relationships, in the other you counted distinct end-nodes.

try to run this and see what it returns:

match (n)-[r:created_for]->(m) 
where id(m) = 1453769 
return count(*) as paths, count(r) as rels, 
       count(n) as seen_n, count(distinct n) as distinct_n