Firing Cypher Abfrage, um die Anzahl der Beziehungen zu kennen

Question

public int getNoOfRelations(long entityId, String relationShipName) { 
    int noOfRelations = 0; 
    Map<String, Object> map = new SeqncMap<String, Object>(); 
    map.put("objectId", entityId); 
    String query = "MATCH (object1)-[r:" + relationShipName 
      + "]->(object2) WHERE id(object2) in {objectId} return count(r)"; 
    Result result = session.query(query, map); 
    Iterator<Map<String, Object>> iterator = result.iterator(); 
    if (iterator != null && iterator.hasNext()) { 
     Map<String, Object> next = iterator.next(); 
     noOfRelations = (int) next.get("count"); 
    } 
    return noOfRelations; 
} 

Gibt folgende Ausnahme während "session.query (query, map);"

org.neo4j.ogm.exception.TransactionException: Failed to execute request: 
17:38:35,793 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.neo4j.ogm.drivers.http.transaction.HttpTransaction.rollback(HttpTransaction.java:49) 
17:38:35,796 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.data.neo4j.transaction.Neo4jTransactionManager.rollback(Neo4jTransactionManager.java:60) 
17:38:35,800 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
17:38:35,803 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
17:38:35,805 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
17:38:35,809 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at java.lang.reflect.Method.invoke(Method.java:606) 
17:38:35,813 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302) 
17:38:35,817 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) 
17:38:35,821 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
17:38:35,827 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133) 
17:38:35,831 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121) 
17:38:35,840 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
17:38:35,843 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) 
17:38:35,847 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at com.sun.proxy.$Proxy55.rollback(Unknown Source) 
17:38:35,848 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:539) 
17:38:35,854 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:285) 
17:38:35,864 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) 
17:38:35,868 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
17:38:35,875 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655) 
17:38:35,880 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at com.seqnc.ui.service.impl.CompanyServiceImpl$$EnhancerBySpringCGLIB$$e90d4dcf.deleteLocation(<generated>) 
17:38:35,884 ERROR [stderr] (seqnc-executor-connector-threads - 1)  at com.seqnc.ui.executors.company.department.DeleteLocationExecutor.execute(DeleteLocationExecutor.java: 

38)

Answer 1

Ihre Suche hat ein IN Prädikat in der WHERE Klausel:

WHERE id(object2) in {objectId} 

die objectId impliziert soll eine Sammlung sein.

Es ist jedoch als eine einzige long: map.put("objectId", entityId) mit einer früheren Deklaration von long entityId festgelegt.