如何在neo4j的現有節點中附加關係？

Question

我想從csv文件中創建圖形，但我無法在現有節點中添加其他關係。

我實際的代碼是：

USING PERIODIC COMMIT 10000 
LOAD CSV FROM 'my_file.csv' AS line 
MERGE (p:Title { title: line[0]}) 

MERGE (a:Author { name: line[1]}) 
MERGE (a)-[:COLABORATE_IN]->(p) 

WITH line WHERE line[2] IS NOT NULL 
MERGE (b:Author {name: line[2]}) 
MERGE (b)-[:COLABORATE_IN]->(p) //not working 

RETURN line[2] 

這應該是一個簡單的，它創造了很好的節點和首創的關係，但對於行[2]，它只是創造新節點的關係。我能做什麼？

感謝

未在 WITH子句中管道

Answer 1

一切都是不可查詢的下一部分：

MERGE (a:Author { name: line[1]}) 
MERGE (a)-[:COLABORATE_IN]->(p) 

WITH line WHERE line[2] IS NOT NULL 
// p is no more available here 

只需添加p標識，使其可在剩餘部分查詢：

USING PERIODIC COMMIT 10000 
LOAD CSV FROM 'my_file.csv' AS line 
MERGE (p:Title { title: line[0]}) 

MERGE (a:Author { name: line[1]}) 
MERGE (a)-[:COLABORATE_IN]->(p) 

WITH p, line 
WHERE line[2] IS NOT NULL 
MERGE (b:Author {name: line[2]}) 
MERGE (b)-[:COLABORATE_IN]->(p) //not working 

RETURN line[2]