Question

neo4j是否可以通过关系进行排序和过滤？例如：

我有关系密切的花园和孩子（父亲，母亲，兄弟，姐妹），我想用这种类型的过滤器列出具有关系的花园和孩子：

if the gardien is the father of the kid: 
   then return (father, kid)
else if the kid doesn't have the father :
   then return his (mother, kid)
else if the kid doesn't have the father or mother:
   then return his (brother, kid)
otherwise :
   return his (sister, kid)

如何用cypher发出这样的请求？

先谢谢您

Answer 1

如果您可以添加（父亲，母亲，...）作为关系的属性，我认为此查询可以为您提供帮助

MATCH (:Human {type:'kid'})-[r:Relate]-(gurdian:Human)
WITH m ,CASE r.type 
    WHEN 'father' THEN 0
    WHEN 'mother' THEN 1
    WHEN 'brother' THEN 2
    ELSE 3
    END as value
RETURN gurdian ORDER BY value

我的数据测试：

Create (b:Human {type: 'kid'}),
(f:Human {type: 'father'}),
(m:Human {type: 'mother'}), 
(br:Human {type: 'brother'}),
(b)-[:Relate {type: 'father'}]->(f),
(b)-[:Relate {type: 'mother'}]->(m),
(b)-[:Relate {type: 'brother'}]->(br)

在neo4J密码中按顺序过滤列表

1 个答案: