Spring Data Neo4j - Getting an exception when running a cypher query -

i'm getting strange exception when trying run simple cypher query. first i'll introduce code, , i'll show cause exception. have following classes:

a simple class represent user profile:

public abstract class profile extends abstractentity {      @indexed     profiletype profiletype;      @indexed(indextype = indextype.fulltext, indexname = "name")     string firstname;      @indexed(indextype = indextype.fulltext, indexname = "name")     string lastname;      @indexed     eyecolor eyecolor;      @indexed         haircolor haircolor;      @indexed     nationality nationality;      @indexed     int height;      public profile() {         setprofiletype();     }      public profile(string firstname, string lastname, nationality nationality, eyecolor eyecolor, haircolor haircolor, int height) {         this();         this.setfirstname(firstname);         this.setlastname(lastname);         this.setnationality(nationality);         this.sethaircolor(haircolor);         this.seteyecolor(eyecolor);         this.setheight(height);     }         /* getters , setters */ } 

and simple class, inherit profile, , represents civilian:

@nodeentity public class civilian extends profile {      @graphproperty(propertytype = long.class)     datetime dateofbirth;      @indexed     boolean missing;      @relatedto     @fetch     set<casualty> casualties = new hashset<casualty>(); //todo: design      public civilian() {         this.profiletype = profiletype.civilian;     }      public civilian(string firstname, string lastname, nationality nationality, eyecolor eyecolor, haircolor haircolor, int height, datetime dateofbirth, boolean missing) {         super(firstname, lastname, nationality, eyecolor, haircolor, height);         this.setdateofbirth(dateofbirth);         this.setmissing(missing);     }      /* getters , setters */ } 

so created following repository civilian class:

public interface civilianrepository extends graphrepository<civilian> {     @query("start n=node(*) n.firstname=~{0} return n")        page<civilian> findciviliansproperties(string firstname, pageable page);     } 

ok. created few civilian nodes, , populated graph them. there no other nodes in graph, except civilian nodes. when run findciviliansproperties method, following exception:

exception in thread "main" org.springframework.dao.invaliddataaccessresourceusageexception: error executing statement start n=node(*) n.firstname=~{0} return n skip 0 limit 10; nested exception org.springframework.dao.invaliddataaccessresourceusageexception: error executing statement start n=node(*) n.firstname=~{0} return n skip 0 limit 10; nested exception org.neo4j.cypher.entitynotfoundexception: property 'firstname' not exist on node[0]     @ org.springframework.data.neo4j.support.query.cypherqueryengine.query(cypherqueryengine.java:52)     @ org.springframework.data.neo4j.repository.query.graphrepositoryquery.dispatchquery(graphrepositoryquery.java:98)     @ org.springframework.data.neo4j.repository.query.graphrepositoryquery.execute(graphrepositoryquery.java:81)     @ org.springframework.data.repository.core.support.repositoryfactorysupport$queryexecutormethodinterceptor.invoke(repositoryfactorysupport.java:312)     @ org.springframework.aop.framework.reflectivemethodinvocation.proceed(reflectivemethodinvocation.java:172)     @ org.springframework.transaction.interceptor.transactioninterceptor$1.proceedwithinvocation(transactioninterceptor.java:96)     @ org.springframework.transaction.interceptor.transactionaspectsupport.invokewithintransaction(transactionaspectsupport.java:260)     @ org.springframework.transaction.interceptor.transactioninterceptor.invoke(transactioninterceptor.java:94)     @ org.springframework.aop.framework.reflectivemethodinvocation.proceed(reflectivemethodinvocation.java:172)     @ org.springframework.dao.support.persistenceexceptiontranslationinterceptor.invoke(persistenceexceptiontranslationinterceptor.java:155)     @ org.springframework.aop.framework.reflectivemethodinvocation.proceed(reflectivemethodinvocation.java:172)     @ org.springframework.aop.framework.jdkdynamicaopproxy.invoke(jdkdynamicaopproxy.java:204)     @ com.sun.proxy.$proxy33.findciviliansproperties(unknown source)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     @ java.lang.reflect.method.invoke(unknown source)     @ org.springframework.aop.support.aoputils.invokejoinpointusingreflection(aoputils.java:317)     @ org.springframework.aop.framework.jdkdynamicaopproxy.invoke(jdkdynamicaopproxy.java:198)     @ com.sun.proxy.$proxy36.findciviliansproperties(unknown source)     @ org.technion.socialrescue.playground.playground.main(playground.java:38) caused by: org.springframework.dao.invaliddataaccessresourceusageexception: error executing statement start n=node(*) n.firstname=~{0} return n skip 0 limit 10; nested exception org.neo4j.cypher.entitynotfoundexception: property 'firstname' not exist on node[0]     @ org.springframework.data.neo4j.support.query.cypherqueryengine.parseandexecutequery(cypherqueryengine.java:63)     @ org.springframework.data.neo4j.support.query.cypherqueryengine.query(cypherqueryengine.java:49)     ... 20 more caused by: org.neo4j.cypher.entitynotfoundexception: property 'firstname' not exist on node[0]     @ org.neo4j.cypher.internal.commands.expressions.property.apply(property.scala:35)     @ org.neo4j.cypher.internal.commands.expressions.property.apply(property.scala:29)     @ org.neo4j.cypher.internal.commands.regularexpression.ismatch(predicate.scala:259)     @ org.neo4j.cypher.internal.pipes.filterpipe$$anonfun$createresults$1.apply(filterpipe.scala:29)     @ org.neo4j.cypher.internal.pipes.filterpipe$$anonfun$createresults$1.apply(filterpipe.scala:29)     @ scala.collection.iterator$$anon$22.hasnext(iterator.scala:390)     @ scala.collection.iterator$$anon$19.hasnext(iterator.scala:334)     @ scala.collection.iterator$class.isempty(iterator.scala:272)     @ scala.collection.iterator$$anon$19.isempty(iterator.scala:333)     @ org.neo4j.cypher.internal.pipes.slicepipe.createresults(slicepipe.scala:32)     @ org.neo4j.cypher.internal.pipes.columnfilterpipe.createresults(columnfilterpipe.scala:37)     @ org.neo4j.cypher.internal.executionplan.executionplanimpl$$anonfun$6.apply(executionplanimpl.scala:127)     @ org.neo4j.cypher.internal.executionplan.executionplanimpl$$anonfun$6.apply(executionplanimpl.scala:125)     @ org.neo4j.cypher.internal.executionplan.executionplanimpl.execute(executionplanimpl.scala:33)     @ org.neo4j.cypher.executionengine.execute(executionengine.scala:59)     @ org.neo4j.cypher.executionengine.execute(executionengine.scala:63)     @ org.neo4j.cypher.javacompat.executionengine.execute(executionengine.java:79)     @ org.springframework.data.neo4j.support.query.cypherqueryengine.parseandexecutequery(cypherqueryengine.java:61)     ... 21 more caused by: org.neo4j.graphdb.notfoundexception: 'firstname' property not found nodeimpl#0.     @ org.neo4j.kernel.impl.core.primitive.newpropertynotfoundexception(primitive.java:184)     @ org.neo4j.kernel.impl.core.primitive.getproperty(primitive.java:179)     @ org.neo4j.kernel.impl.core.nodeimpl.getproperty(nodeimpl.java:52)     @ org.neo4j.kernel.impl.core.nodeproxy.getproperty(nodeproxy.java:155)     @ org.neo4j.cypher.internal.commands.expressions.property.apply(property.scala:33)     ... 38 more 

so important thing exception following line - the property 'firstname' not exist on node[0].. how can be? there civilian nodes in graph, , have firstname property. can neo4j framework adds more hidden nodes graph i'm not aware of? because when change query this:

start n=node(*) has(n.firstname) , n.firstname=~{0} return n 

everything works fine...

what wrong?

thanks!!

neo4j automatically comes 1 node when create new instance, , that's reference node. should delete this.

graphdatabaseservice.getnodebyid(0).delete()