根据 neo4j 中的收集值排序

Question

我有这个查询MATCH (r:Class {Name: 'A'})-[perm]->(res:source) RETURN res.Name AS resource, collect(type(perm)) AS permission ORDER BY resource

它返回给我这样的回复

"AB sources",
      [
        "D",
        "C",
        "A",
        "B"
      ]

我想要的是这个 D C A B 应该像 A B C D

我尝试通过 order by for perm 但这给出了错误。我怎样才能做到这一点？

Answer 1

您必须使用 APOC 库对集合进行排序：

MATCH (r:Class {Name: 'A'})-[perm]->(res:source) 
WITH res.Name AS resource, collect(type(perm)) AS permission
RETURN resource, apoc.coll.sort(permission) AS permission
ORDER BY resource