不工作

TinkerPop有关Neo4j的暗号询问我有一个Neo4j的图（创建使用精怪），我想它使用精怪以及使用，然而，似乎暗号查询图表上不工作：不工作

import org.apache.tinkerpop.gremlin 
import gremlin.neo4j.structure.Neo4jGraph 
import gremlin.tinkergraph.structure.TinkerGraph 
import gremlin.hadoop.structure.HadoopGraph 
import org.apache.commons.configuration.Configuration 

trait Graph[G] { 
    def create(location: String, args: Configuration = null): G 
} 

object Grapher { 

    implicit val createNeo4j = new Graph[Neo4jGraph] { 
    def create(location: String, args: Configuration = null) = 
     if (args != null) Neo4jGraph.open(args) else Neo4jGraph.open(location) 
    } 

    implicit val createTinkerGraph = new Graph[TinkerGraph] { 
    def create(location: String, args: Configuration = null) = 
     if (args != null) TinkerGraph.open(args) else TinkerGraph.open() 
    } 

    implicit val createHadoopGraph = new Graph[HadoopGraph] { 
    def create(location: String, args: Configuration = null) = 
     if (args != null) HadoopGraph.open(args) else HadoopGraph.open(location) 
    } 
} 

object GraphSyntax { 
    def createGraph[G](location: String, args: Configuration = null)(implicit graph: Graph[G]) = graph.create(location, args) 
}

这是我尝试执行查询：如果我加载图形转换的Neo4j服务器，同样的查询工作的Neo4j的Web控制台上

import Grapher._ 
import GraphSyntax._ 

val graph = createGraph[Neo4jGraph](fileName) 
// org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph = neo4jgraph[community single [/media/ixaxaar/Source/src/telperion/core/neo4j.db]] 

graph.cypher("match (n) return n limit 10").toList 
// java.util.List[Nothing] = []

。

match (n) return n limit 10

我使用下列库：

final val Gremlin     = "3.2.1" 
final val Neo4jTinkerpop   = "0.4-3.0.3" 
val gremlinCore  = "org.apache.tinkerpop" % "gremlin-core"    % Version.Gremlin 
val gremlinGiraph  = "org.apache.tinkerpop" % "giraph-gremlin"   % Version.Gremlin 
val gremlinNeo4j  = "org.apache.tinkerpop" % "neo4j-gremlin"   % Version.Gremlin 
val hadoopGremlin  = "org.apache.tinkerpop" % "hadoop-gremlin"   % Version.Gremlin 
val tinkergraphGremlin = "org.apache.tinkerpop" % "tinkergraph-gremlin"  % Version.Gremlin 
val neo4jTinkerpop  = "org.neo4j"    % "neo4j-tinkerpop-api-impl" % Version.Neo4jTinkerpop

来源

2016-08-14 ixaxaar

你如何去Gremlin查询Neo？你可以推荐任何Tuts或图书馆？ – swelet

如果您已经有一个neo图形，例如在'val location =“〜/ bin/neo4j-community-3.0.4/data/databases/graph.db”中，你可以使用'Neo4jGraph.open（location）'直接将它加载到gremlin中，打开一个遍历val t = graph.traversal（）'然后执行gremlin查询val res = tV（）。blah（）。blah（）' 阅读gremlin遍历查询 - > http://tinkerpop.apache.org/ docs/current/reference /＃遍历 – ixaxaar

另外，你可以使用'graph.cypher（“匹配你的密码查询”）在gremlin中使用密码'' 如果你需要一些样板，请参考上面的代码（在scala中）。上面列出了sbt依赖项以及 – ixaxaar

为此非常抱歉，原来我打开一个新的图形（fileName是不正确的）。

scala> graph.cypher("match (n) return n limit 10").toList 
res3: java.util.List[Nothing] = [{n=v[0]}, {n=v[1]}, {n=v[2]}, {n=v[3]}, {n=v[4]}, {n=v[5]}, {n=v[6]}, {n=v[7]}, {n=v[8]}, {n=v[9]}]

来源

2016-08-14 11:13:47 ixaxaar

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