neo4j/cypher：字符串到映射的内联转换

Question

这可能是显而易见的，但对我来说不是：我有一个 JSON 对象，它有一个包含字符串化 JSON 的属性（不要问为什么，它必须是这样），当我展开该对象并获取该属性（键）时有没有办法转换为内联到密码查询的映射？

WITH {input} AS S
UNWIND S AS stat
WITH stat.key.str as K, stat.value as value
UNWIND K as key
RETURN key, value

返回：

核心价值  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -     

-  -  -  -  - ------------------------------------------------------   
{"角色":"消费者", "ipproto":"TCP","l7proto":"tcp:80","port":80,"dir":""} 156         
{"角色":"消费者","ipproto":"TCP"," l7proto":"tcp:443","端口":443,"dir":""} 223         
{"角色":"消费者","ipproto":"TCP","l7proto":"MSN","端口“：1863，”目录“：”“} 106208

是否可以解析/加载键中的字符串值以将其读取为映射，或者我是否必须在密码查询之外将其转换？

抱歉 - 我对 Neo4j 和 cypher 都不是菜鸟......

Answer 1

为此，您需要APOC 程序apoc.convert.fromJsonMap()，特别是将其转换为 Cypher 映射。以下是您将如何使用它：

WITH {input} AS S
UNWIND S AS stat
WITH stat.key.str as K, stat.value as value
UNWIND K as key
WITH apoc.convert.fromJsonMap(key) as map, value
...