找不到節點

Question

爲Trying out neo4j grails plugin, but it does not mach the docs

延續我有一個測試，現在看起來是這樣的：

package com.iibs.graph 

import groovy.util.GroovyTestCase 
import com.iibs.graph.Node 

public class NodeTests extends GroovyTestCase { 

    def graphDatabaseService 

    void testCRUD() { 
     Node.deleteAll(Node.list()) 

     Node node = new Node(name: "Name") 

     node.save(flush: true, failOnError: true) 

     Node found = Node.findByName("Name") 

     assert found instanceof Node 
     assert found.getName() == "Name" 

     org.neo4j.graphdb.Node graphNode = graphDatabaseService.getNodeById(node.getId()) 

     assert graphNode.instanceOf(org.neo4j.graphdb.Node) == true 
    } 
} 

而且我如下得到一個錯誤：

| Running 1 integration test... 1 of 1 
| Failure: testCRUD(com.iibs.graph.NodeTests) 
| org.neo4j.graphdb.NotFoundException: Node 905482810884096 not found 
    at org.neo4j.kernel.InternalAbstractGraphDatabase.getNodeById(InternalAbstractGraphDatabase.java:1088) 
    at com.iibs.graph.NodeTests.testCRUD(NodeTests.groovy:22) 
    at junit.framework.TestCase.runTest(TestCase.java:176) 
    at junit.framework.TestCase.runBare(TestCase.java:141) 
    at junit.framework.TestResult$1.protect(TestResult.java:122) 
    at junit.framework.TestResult.runProtected(TestResult.java:142) 
    at junit.framework.TestResult.run(TestResult.java:125) 
    at junit.framework.TestCase.run(TestCase.java:129) 
    at junit.framework.TestSuite.runTest(TestSuite.java:255) 
    at junit.framework.TestSuite.run(TestSuite.java:250) 
| Completed 1 integration test, 1 failed in 0m 2s 

據我所知，從提到的線程，這應該是獲得節點的可能方式之一。或者我錯了？

Answer 1

試試下面的代碼片段（沒有測試自己，只是一個題庫）：

def nodeInstance = .... 
nodeInstance.save(flush:true) 

String label = nodeInstance.getClass().simpleName 
def neoNode = graphDatabaseService.findNodesByLabelAndProperty(DynamicLabel.label(label), "__id__", nodeInstance.id)