如何在 Neo4j 中下载到 CSV

Question

我一直在尝试在我的图表上下载某些数据，但它返回此错误： Neo.ClientError.Statement.SyntaxError: Type mismatch: expected List<Node> but was Node (line 2, column 27 (offset: 77))"CALL apoc.export.csv.data(c,[], "contrib.csv",{})"

这是我做的查询：

MATCH (c:Contrib) WHERE c.nationality CONTAINS "|" CALL apoc.export.csv.data(c,[], "contrib.csv",{}) YIELD file, source, format, nodes, relationships, properties, time, rows, batchSize, batches, done, data RETURN file, source, format, nodes, relationships, properties, time, rows, batchSize, batches, done, data

出了什么问题？ :(

谢谢

Answer 1

函数的语法：apoc.export.csv.data 是

apoc.export.csv.data(nodes,rels,file,config) 

• 将给定的节点和关系以 csv 格式导出到提供的文件中

节点是节点的集合，而不是一个节点。

OLD: MATCH (c:Contrib) WHERE c.nationality CONTAINS "|" 
     CALL apoc.export.csv.data(c,[], "contrib.csv",{})

NEW: MATCH (c:Contrib) WHERE c.nationality CONTAINS "|" 
     WITH collect(c) as contribs
     CALL apoc.export.csv.data(contribs, [], "contrib.csv", {})