在 Cypher Neo4J 中向 APOC 发送参数

Question

我需要在我的 Neo4J Cypher 请求中向 APOC 函数发送多个关系 ID：

PROFILE UNWIND $contexts as cons 
WITH cons 
CALL apoc.index.relationships('TO','context:cons') 
YIELD rel, start, end 
WITH DISTINCT rel, start, end 
WHERE rel.user='15229100-b20e-11e3-80d3-6150cb20a1b9' 
RETURN DISTINCT start.uid AS source_id, start.name AS source_name, end.uid AS target_id, end.name AS target_name, rel.uid AS edge_id, rel.context AS context_id, rel.statement AS statement_id, rel.weight AS weight;

我的参数如下：

{
 "contexts": [
 "09a73400-20ab-11e9-a5b3-9fb3da66a7cb",
 "0113a5c0-1f8f-11e9-9ff3-8379606e6d34",
 "3fb1d040-1f85-11e9-964f-7dc221bb473c",
 "1d0d8ed0-1f85-11e9-964f-7dc221bb473c"
 ]
}

当我像这样发送它们时

 CALL apoc.index.relationships('TO','context:09a73400-20ab-11e9-a5b3-9fb3da66a7cb 0113a5c0-1f8f-11e9-9ff3-8379606e6d34 3fb1d040-1f85-11e9-964f-7dc221bb473c 1d0d8ed0-1f85-11e9-964f-7dc221bb473c')

有效...

如何重写我的上述请求，以便将 id 传递到 APOC 函数中？

Answer 1

这是一个 Lucene 查询字符串，因此您必须构建它或将其作为参数发送：

WITH 'context:('+apoc.text.join($contexts,' ')+')' as query
WITH cons 
CALL apoc.index.relationships('TO',query) 
...