未使用加载 csv 添加 Neo4j 关系答案

【问题标题】：Neo4j relationship not getting added using Load csv未使用加载 csv 添加 Neo4j 关系
【发布时间】：2016-06-14 03:11:08
【问题描述】：

我正在尝试使用 neo4j 的加载 csv 方法。我已成功将所有节点添加到 neo4j。但是当涉及到关系时，密码语句运行没有任何错误，但它们永远不会被添加并且在浏览器中不可见。但是可以看到节点就好了。以下是我的 CSV。

第一个是 Customer.csv，第二个是 customer_send.csv

         Galactic_ID:ID(Customer),:LABEL
 1000000000036666531,Customer
 2000000000198737143,Customer
 2000000000101281958,Customer
 1000000000281474324,Customer
 1000000000073478335,Customer
 1000000000283083892,Customer
 2000000000230105092,Customer
 1000000000287320588,Customer
 1000000000020059606,Customer


    :START_ID(Customer),:END_ID(Customer),TXN_KEY,Amount,SendTime,PayTime,:TYPE
1000000000036666531,1000000000089771041,5000000000107593411,20.0,1361439,1362963.0,Customer_Send
2000000000198737143,2000000000181818203,5000000000108495674,220.0,1361434,1362369.0,Customer_Send
2000000000101281958,1000000000210500686,5000000000106488543,1000.0,1361435,1363053.0,Customer_Send
1000000000281474324,2000000000246874104,5000000000106029876,1669.0,1361424,1362506.0,Customer_Send
1000000000073478335,2000000000200242093,5000000000107872144,180.0,1361415,1362680.0,Customer_Send
1000000000283083892,2000000000258949202,5000000000107701034,156.0,1361414,1362738.0,Customer_Send
2000000000230105092,1000000000064145673,5000000000105488820,329.0,1361392,1362558.0,Customer_Send
1000000000287320588,1000000000287658165,5000000000105281335,620.0,1361391,1362365.0,Customer_Send
1000000000020059606,1000000000046608791,5000000000105081275,65.0,1361389,1363317.0,Customer_Send

以下是我的密码语句：

In [24]: stmt6 = """USING PERIODIC COMMIT LOAD CSV FROM "file:///mnt/database/Neo/db3/import_data1/customer.csv" AS csvLine
 ....: MERGE (c:Customer {Galactic_ID:csvLine[0]})
 ....: ON CREATE SET c.Galactic_ID = csvLine[0]"""

    stmt3 = """USING PERIODIC COMMIT LOAD CSV     FROM"file:///mnt/database/Neo/db3/import_data1/customer_send.csv" AS csvLine
 Match (a:Customer {Customer:csvLine[0]}), (c:Customer {Customer:csvLine[1]})
 Merge (a)-[r:Customer_Send]->(c)
 On Create SET r.TXN_KEY = csvLine[2], r.Amount = csvLine[3], r.SendTime = csvLine[4], r.PayTime = csvLine[5]"""


graph.cypher.execute(stmt6)

graph.cypher.execute(stmt3)

创建客户节点的第一个图形 stmt 运行良好，节点已创建并在图形中可见。第二个 stmt 运行了一段时间，没有任何错误结束，但没有创建任何关系。

【问题讨论】：

标签： csv neo4j py2neo

【解决方案1】：

尝试匹配您创建它们的属性上的节点：

Match (a:Customer {Customer:csvLine[0]}), (c:Customer {Customer:csvLine[1]})

=>

Match (a:Customer {Galactic_ID:csvLine[0]}), (c:Customer {Galactic_ID:csvLine[1]})

【讨论】：

我已经在我的密码 stmt 中做到了：stmt3 = """USING PERIODIC COMMIT LOAD CSV FROM"file:///mnt/database/Neo/db3/import_data1/customer_send.csv" AS csvLine Match (a:Customer {Customer:csvLine[0]}), (c:Customer {Customer:csvLine[1]}) Merge (a)-[r:Customer_Send]->(c) On Create SET r.TXN_KEY = csvLine[2], r.Amount = csvLine[3], r.SendTime = csvLine[4], r.PayTime = csvLine[5]"""
@vishalbhatt 您需要匹配Galactic_ID 属性而不是Customer 属性。
customer_send.csv 文件中没有 Galactic_ID 属性，我在上面也提到过。
@vishalbhatt 在第一个查询中添加节点并设置属性Galactic_ID。