在 Neo4j 数据库中重新创建参考节点 [英] Recreate reference node in a Neo4j database

问题描述

我不小心删除了节点 0，它是我在新图上的参考节点，因此之后对 getReferenceNode() 的调用将失败.我搜索了 Neo4j 源代码并找到了一个可以使用以下方法重新创建它的源代码:

I accidentally deleted node 0, which was my reference node on a new graph, so calls to getReferenceNode() would fail afterwards. I searched through the Neo4j source and found a that I could recreate it using:

GraphDatabaseService graphDb = new EmbeddedGraphDatabase("mytestdb");    
((EmbeddedGraphDatabase) graphDb).getConfig().getGraphDbModule().createNewReferenceNode();

我是否错过了重新创建参考节点的更好方法?当我运行它时，有时它的 id 为 0，有时为 5，具体取决于存在的其他节点.此外，围绕 getConfig() 的评论说它可能会在未来的版本中被删除.

Am I missing a better way to recreate the reference node? Sometimes it gets an id of 0, sometimes 5 when I run this, depending on what other nodes exist. Also, comments around getConfig() say that it may be removed in future releases.

推荐答案

自从您提出这个问题以来已经过去了一段时间，但是为了您的信息，有一些半最近的 讨论 Neo4j GitHub 问题中的参考节点 - 总之，Peter Neubauer(Neo Technology 员工)讨论了删除参考节点的概念，或添加 setReferenceNode() API 调用.

Some time has passed since you asked this, but for your information there was some semi-recent discussion about reference nodes in a Neo4j GitHub issue - in summary, Peter Neubauer (Neo Technology employee) discusses either removing the concept of reference nodes, or adding a setReferenceNode() API call.

该线程似乎没有太多结论，但从字面上回答您的问题，现在您并没有错过重新创建参考节点的更好方法 - 希望很快就会出现！

There doesn't seem much conclusion from that thread, but to answer your question literally, right now you're not missing a better way to recreate the reference node - hopefully one will be coming soon!

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