Question

我想检查关系是否在关系ID列表中。我尝试了以下方法：

MATCH (start:Stagepoint),(stop:Stagepoint), path=shortestPath(start-[track:TRACK*]-stop) 
WITH REDUCE(dist = 0, rel in rels(path) | dist + rel.distance) AS distance, path, start.name as start, stop.name as stop, track, [1] as visited 
WHERE distance <= 25 AND distance >= 20 AND NOT ID(track) IN visited  
RETURN start, stop, distance, track ORDER BY distance ASC

得到：Expected `track` to be a node or relationship, but it was``

我尝试过以多种方式解决这个问题，但似乎都没有。

我正在使用Neo4j 2.1.6社区版。

Answer 1

在可变长度路径中，关系标识符实际上是关系的集合。所以你的track是一系列关系。

试试这个：

WHERE NONE(t in track WHERE id(t) in visited)

Neo4j检查列表中的ID

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