Question

我是否正确无法使用cypher加载带有标头和数据类型的csv文件？（通过“with datatype”，我的意思是标题，如下所示：对于实体：

orderId：ID（订单）customerId：IGNORE

关系：

：START_ID（订单）：END_ID（产品））

根据这两个网站：https://neo4j.com/developer/guide-import-csv/，http://jexp.de/blog/2015/04/how-to-neo4j-data-import-minimal-example/ 似乎我可以在powershell或命令提示符下以这种方式将数据与头一起导入（我使用的是Windows计算机）：

path\to\neo4j-community-3.1.1\bin\neo4j-import --into graph.db  \
--nodes:Person C:\SavedNewest\people_header.csv, C:\SavedNewest\people.csv  \
--relationships:KNOWS C:\SavedNewest\friendships_header.csv,C:\SavedNewest\friendships.csv

（根据这个网站重建csv：http://jexp.de/blog/2015/04/how-to-neo4j-data-import-minimal-example/）

PowerShell出错：

At line:2 char:3
+ --nodes:Person C:\SavedNewest\people_header.csv,https://gist.githubus ...
+   ~
Missing expression after unary operator '--'.
At line:2 char:3
+ --nodes:Person C:\SavedNewest\people_header.csv,https://gist.githubus ...
+   ~~~~~~~~~~~~
Unexpected token 'nodes:Person' in expression or statement.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : MissingExpressionAfterOperator

命令提示符出错：

WARNING: This command does not appear to be running with administrative rights.
  Some commands may fail e.g. Start/Stop
WARNING: neo4j-import is deprecated and support for it will be removed in a future
version of Neo4j; please use neo4j-admin import instead.

Input error: Expected '--relationships' to have at least 1 valid item, but had 0 []
Caused by:Expected '--relationships' to have at least 1 valid item, but had 0 []
java.lang.IllegalArgumentException: Expected '--relationships' to have at least 1 valid item, but had 0 []
        at org.neo4j.kernel.impl.util.Validators.lambda$atLeast$6(Validators.java:125)
        at org.neo4j.helpers.Args.validated(Args.java:640)
        at org.neo4j.helpers.Args.interpretOptionsWithMetadata(Args.java:608)
        at org.neo4j.tooling.ImportTool.extractInputFiles(ImportTool.java:508)
        at org.neo4j.tooling.ImportTool.main(ImportTool.java:389)
        at org.neo4j.tooling.ImportTool.main(ImportTool.java:334)

错误的原因是什么？如何正确加载带有标头和数据类型的csv文件？

编辑： cmd的新输入：

C:\Users\tsutomu\Desktop\MSS\Bachelorarbeit\neo4j-community-3.1.1\bin\neo4j-import --into graph.db  --nodes:Person "file:c:/SavedNewest/people_header.csv,file:c:/SavedNewest/people.csv" --relationships:KNOWS "file:c:/SavedNewest/friendships_header.csv,file:c:/SavedNewest/friendships.csv"

错误：

Input error: Directory of file:c:\SavedNewest\people_header.csv doesn't exist

引起：文件目录：c：\ SavedNewest \ people_header.csv不存在 java.lang.IllegalArgumentException：文件目录：c：\ SavedNewest \ people_header.csv不存在在org.neo4j.kernel.impl.util.Validators.matchingFiles（Validators.java:48）在org.neo4j.kernel.impl.util.Converters.lambda $ regexFiles $ 7（Converters.java:76）在org.neo4j.kernel.impl.util.Converters.lambda $ toFiles $ 8（Converters.java:95）在org.neo4j.helpers.Args.interpretOptionsWithMetadata（Args.java:608） at org.neo4j.tooling.ImportTool.extractInputFiles（ImportTool.java:508）在org.neo4j.tooling.ImportTool.main（ImportTool.java:388）在org.neo4j.tooling.ImportTool.main（ImportTool.java:334）

PowerShell也有同样的错误。

people_header.csv的路径：C：\ SavedNewest \ people_header.csv 有什么我应该添加到环境路径？

Answer 1

您的命令行中有几个问题：

您的命令行参数中不能包含嵌入空格。例如，C:\SavedNewest\people_header.csv, C:\SavedNewest\people.csv应该是单个参数，因此您需要删除逗号后面的空格或者引用整个参数。
必须正确格式化文件路径URL。引用developer guide：

确保使用正确的网址esp。文件URL。+在OSX和Unix上使用 file：///path/to/data.csv，在Windows上，请使用文件：C：/path/to/data.csv

如何在neo4j中加载带头和数据类型的csv文件？

1 个答案: