[英]Neo4jClient Create and Update a Relationship
我有一个可以通过Neo4jClient访问的Neo4j Graphdatabase 。 (它是Neo4j的REST api的.NET客户端)
文档的开头。
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;
我想做的事
我只是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,还没有关于关系的文档。
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);
你能给我一个添加和更新(数字)关系的例子吗?
在测试用例中有很多东西......例如:
http://hg.readify.net/neo4jclient/src/4693da483a90/Test/ApiUsageIdeas.cs
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(它在我的机器上作为运行visual studio 2012,YMMV的控制台应用程序工作)
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; }
}
}
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?
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