Cassandra Titan Graph数据库中创建顶点和边的问题

我正在尝试在Titan graph数据库（Titan1.0.0）中创建顶点和边

问题:

1） 为什么这里返回的顶点数不是序列，而是一些随机数？对于

addEdge

步骤，它还使用一些随机值创建边（

kblqtz-kblsxk-d6vp-1oysvhk

）

2） 我希望我的

TId

值应该是唯一的 我已尝试以下操作，但收到错误消息：

gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex();
No such property: TId for class: groovysh_evaluate

如何在Titan数据库中创建唯一的属性值

请帮我解决这个问题

顶点ID和边ID由Titan生成和指定。如果您想拥有自己的标识符，您应该定义一个属性并为其编制索引

错误

无此类属性：TId

表示您试图使用尚未初始化的变量

TId

。在尝试索引顶点属性之前，应先定义该属性

gremlin> graph = TitanFactory.open('conf/titan-cassandra-es.properties')
==>standardtitangraph[cassandrathrift:[127.0.0.1]]
gremlin> mgmt = graph.openManagement()
==>com.thinkaurelius.titan.graphdb.database.management.ManagementSystem@4b97b3d2
gremlin> TId = mgmt.makePropertyKey("TId").dataType(Integer.class).cardinality(Cardinality.SINGLE).make()
==>TId
gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex()
==>TId
gremlin> mgmt.commit()
==>null
gremlin> t1 = graph.addVertex(label, "Testbed", "Name", "testbed1","Status","A","TId",101)
==>v[4200]
gremlin> r2= graph.addVertex(label, "Router", "RStatus","F","RId",1002, "TId", 101)
Adding this property for key [TId] and value [101] violates a uniqueness constraint [TId]

请参阅和上的Titan文档

gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex();
No such property: TId for class: groovysh_evaluate

gremlin> graph = TitanFactory.open('conf/titan-cassandra-es.properties')
==>standardtitangraph[cassandrathrift:[127.0.0.1]]
gremlin> mgmt = graph.openManagement()
==>com.thinkaurelius.titan.graphdb.database.management.ManagementSystem@4b97b3d2
gremlin> TId = mgmt.makePropertyKey("TId").dataType(Integer.class).cardinality(Cardinality.SINGLE).make()
==>TId
gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex()
==>TId
gremlin> mgmt.commit()
==>null
gremlin> t1 = graph.addVertex(label, "Testbed", "Name", "testbed1","Status","A","TId",101)
==>v[4200]
gremlin> r2= graph.addVertex(label, "Router", "RStatus","F","RId",1002, "TId", 101)
Adding this property for key [TId] and value [101] violates a uniqueness constraint [TId]