Question

我有一个 Neo4j Graphdatabase ，可通过 Neo4jClient 进行访问。（它是Neo4j的REST API的.NET客户端）

我做了什么

与数据库的连接有效。

Client = new GraphClient(new Uri("http://localhost:7474/db/data"));
Client.Connect();

这样我可以插入节点......

Client.Create(new myNodeClass { name = "Nobody" });

...并查询它们。

Node<myNodeClass> Node = Client.Get<WordNode>(138);
return Node.Data.name;

我想做什么

我只想添加和更新节点之间的关系。（关系的类型必须是数字。）

不幸的是，目前还没有关于人际关系的文件。

有一个名为CreateRelationship的命令。但我无法让它发挥作用。

Client.CreateRelationship(Neo4jClient.NodeReference<TSourceNode>, TRelationship);

您能举例说明添加和更新（数字）关系吗？

Answer 1

在测试案例中有很多东西......比如：

http://hg.readify.net/neo4jclient/src/4693da483a90/Test/ApiUsageIdeas.cs

Answer 2

我被卡住了然后我意识到我需要在CreateRelationship方法中指定源节点引用参数的类型参数。

在这个例子中，我创建了这种关系。我还没有更新这段关系。

披露（它作为运行visual studio 2012，YMMV的控制台应用程序在我的机器上运行）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using Neo4jClient;

namespace Neo4jClientExample
{

    class MyConsoleProgram
    {

        private GraphClient Client {get;set; }

        static void Main(string[] args)
        {

        try{
            GraphClient client = new GraphClient(new Uri("http://localhost:7474/db/data"));
            client.Connect();

            Us us = new Us { Name = "We are Us" };
            NodeReference<Us> usRef = client.Create(us);
            Console.WriteLine("us node.id: {0}", usRef.Id);

            var queryUs = client.Cypher.Start("n", "node(" + usRef.Id + ")").Return<Node<Us>>("n");
            Console.WriteLine("Us node name: {0}\n", queryUs.Results.AsEnumerable<Node<Us>>().First().Data);


            AllYourBase allYourBase = new AllYourBase { Name = "We are all your base" };
            NodeReference<AllYourBase> allYourBaseRef = client.Create(allYourBase);
            Console.WriteLine("AllYourBase node.id: {0}",allYourBaseRef.Id);

            var queryAllYourBase = client.Cypher.Start("n", "node(" + allYourBaseRef.Id + ")").Return<Node<AllYourBase>>("n");
            Console.WriteLine("AllYourBase node name: {0}\n", queryAllYourBase.Results.AsEnumerable<Node<AllYourBase>>().First().Data);

            RelationshipReference areBelongToRef = client.CreateRelationship(allYourBaseRef, new AreBelongTo(usRef));

            var query = client.Cypher.Start("allyourbase", "node(" + allYourBaseRef.Id + ")").Match("allyourbase-[:ARE_BELONG_TO]->us").Return<Node<AllYourBase>>("allyourbase");
            query.ExecuteWithoutResults();
            Console.WriteLine("Result of querying for all your base that belongs to us: {0}", query.Results.AsEnumerable<Node<AllYourBase>>().First().Data.Name);
        }
        catch(Exception ex)
        {
            Console.WriteLine("{0}", ex.Message);
            Console.WriteLine("{0}", ex.InnerException);
        }
        Console.ReadKey();
    }
}

public class Us
{
    public string Name {get; set;}

    public Us()
    {
    }
}

public class AllYourBase
{
    public string Name { get; set; }

    public AllYourBase()
    {
    }
}
public class AreBelongTo : Relationship, IRelationshipAllowingSourceNode<AllYourBase>,
                                         IRelationshipAllowingTargetNode<Us>
{
    public AreBelongTo(NodeReference targetNode)
        : base(targetNode)
    {}

    public const string TypeKey = "ARE_BELONG_TO";

    public override string RelationshipTypeKey
    {
        get { return TypeKey; }
    }
}

Answer 3

您可以查看测试http://hg.readify.net/neo4jclient/src/4693da483a90/Test/RelationshipTests.cs或联系Neo4j邮件列表上的作者groups.google.com/group/neo4j？

Neo4jClient创建和更新关系

3 个答案: