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Creating relationship - id is null throws org.neo4j.graphdb.NotFoundExce ption
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Chris  
View profile  
 More options Apr 29 2012, 8:34 pm
From: Chris <chrisb.business.em...@gmail.com>
Date: Sun, 29 Apr 2012 17:34:34 -0700 (PDT)
Local: Sun, Apr 29 2012 8:34 pm
Subject: Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
Print | Individual message | Show original | Report this message | Find messages by this author

Hi, i'm trying to create a relationship between two different classes;
Resource, and ResourceService. When I create the relationship I can see the
start and end nodes are correct but the id is null.. my test has two
repositories configured

@Autowired protected ResourceRepository resourceRepository;
@Autowired protected  ResourceServiceRepository serviceRepository;

// throws not found exception in test method
Resource res = template.save( new Resource("123", "resourceTest") );
ResourceService rservice = template.save( new ResourceService("101",
"resourceService", "me", "http://example.com") );
ConsumesResource cr = rservice.addConsumedResource(res);
template.save( cr ); // start and end nodes are correct but id is null -
throws exception

Here is the stack trace
org.neo4j.graphdb.NotFoundException: '__type__' property not found for
RelationshipImpl #11 of type 2 between Node[12] and Node[15].
    at
org.neo4j.kernel.impl.core.Primitive.newPropertyNotFoundException(Primitive .java:183)
    at org.neo4j.kernel.impl.core.Primitive.getProperty(Primitive.java:178)
    at
org.neo4j.kernel.impl.core.RelationshipProxy.getProperty(RelationshipProxy. java:90)
    at
org.springframework.data.neo4j.support.typerepresentation.AbstractIndexingT ypeRepresentationStrategy.getJavaType(AbstractIndexingTypeRepresentationStr ategy.java:89)
    at
org.springframework.data.neo4j.support.mapping.TRSTypeAliasAccessor.readAli asFrom(TRSTypeAliasAccessor.java:39)
    at
org.springframework.data.neo4j.support.mapping.TRSTypeAliasAccessor.readAli asFrom(TRSTypeAliasAccessor.java:29)
    at
org.springframework.data.convert.DefaultTypeMapper.readType(DefaultTypeMapp er.java:72)
    at
org.springframework.data.convert.DefaultTypeMapper.getDefaultedTypeToBeUsed (DefaultTypeMapper.java:116)
    at
org.springframework.data.convert.DefaultTypeMapper.readType(DefaultTypeMapp er.java:93)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.rea d(Neo4jEntityConverterImpl.java:74)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedC onverter.read(Neo4jEntityPersister.java:168)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createE ntityFromState(Neo4jEntityPersister.java:189)
    at
org.springframework.data.neo4j.support.Neo4jTemplate.createEntityFromState( Neo4jTemplate.java:190)
    at
org.springframework.data.neo4j.fieldaccess.GraphBackedEntityIterableWrapper .underlyingObjectToObject(GraphBackedEntityIterableWrapper.java:38)
    at
org.springframework.data.neo4j.fieldaccess.GraphBackedEntityIterableWrapper .underlyingObjectToObject(GraphBackedEntityIterableWrapper.java:26)
    at
org.neo4j.helpers.collection.IterableWrapper$MyIteratorWrapper.underlyingOb jectToObject(IterableWrapper.java:57)
    at
org.neo4j.helpers.collection.IteratorWrapper.next(IteratorWrapper.java:47)
    at
org.neo4j.helpers.collection.IteratorUtil.addToCollection(IteratorUtil.java :322)
    at
org.neo4j.helpers.collection.IteratorUtil.addToCollection(IteratorUtil.java :339)
    at
org.springframework.data.neo4j.fieldaccess.OneToNRelationshipEntityFieldAcc essorFactory$OneToNRelationshipEntityFieldAccessor.getValue(OneToNRelations hipEntityFieldAccessorFactory.java:119)
    at
org.springframework.data.neo4j.fieldaccess.DefaultEntityState.getValue(Defa ultEntityState.java:97)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyE ntityStatePropertyValue(SourceStateTransmitter.java:110)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.acces s$000(SourceStateTransmitter.java:39)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter$2.doW ithAssociation(SourceStateTransmitter.java:64)
    at
org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociat ions(BasicPersistentEntity.java:185)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyP ropertiesFrom(SourceStateTransmitter.java:60)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.loa dEntity(Neo4jEntityConverterImpl.java:98)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.rea d(Neo4jEntityConverterImpl.java:90)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedC onverter.read(Neo4jEntityPersister.java:168)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createE ntityFromState(Neo4jEntityPersister.java:186)
    at
org.springframework.data.neo4j.support.Neo4jTemplate.createEntityFromState( Neo4jTemplate.java:190)
    at
org.springframework.data.neo4j.fieldaccess.RelationshipNodeFieldAccessorFac tory$RelationshipNodeFieldAccessor.getValue(RelationshipNodeFieldAccessorFa ctory.java:102)
    at
org.springframework.data.neo4j.fieldaccess.DefaultEntityState.getValue(Defa ultEntityState.java:97)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyE ntityStatePropertyValue(SourceStateTransmitter.java:110)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.acces s$000(SourceStateTransmitter.java:39)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter$2.doW ithAssociation(SourceStateTransmitter.java:64)
    at
org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociat ions(BasicPersistentEntity.java:185)
    at
org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyP ropertiesFrom(SourceStateTransmitter.java:60)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.loa dEntity(Neo4jEntityConverterImpl.java:98)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.rea d(Neo4jEntityConverterImpl.java:90)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedC onverter.read(Neo4jEntityPersister.java:168)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createE ntityFromState(Neo4jEntityPersister.java:189)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist (Neo4jEntityPersister.java:245)
    at
org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist (Neo4jEntityPersister.java:227)
    at
org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.jav a:295)
    at
jackal.mytest.domain.DomainTest.resourcesCanBeConsumed(DomainTest.java:156)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:5 7)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp l.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod .java:44)
    at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable. java:15)
    at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.j ava:41)
    at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.ja va:20)
    at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:2 8)
    at
org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallb acks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at
org.springframework.test.context.junit4.statements.RunAfterTestMethodCallba cks.evaluate(RunAfterTestMethodCallbacks.java:82)
    at
org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(Sp ringRepeat.java:72)
    at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(Sp ringJUnit4ClassRunner.java:231)
    at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.ja va:49)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at
org.springframework.test.context.junit4.statements.RunBeforeTestClassCallba cks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at
org.springframework.test.context.junit4.statements.RunAfterTestClassCallbac ks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJ Unit4ClassRunner.java:174)
    at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestRe ference.java:50)
    at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java: 38)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR unner.java:467)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR unner.java:683)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner .java:390)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunne r.java:197)

my classes - Service has @NodeEntity
public class ResourceService extends Service
{
    public ResourceService(String id, String name, String owner, String uri)
    {
        super(id, name, owner, uri);
    }

    public ResourceService(String id, String name, String owner, String
uri, String... tags)
    {
        super(id, name, owner, uri, tags);
    }

    public ResourceService ()
    { }

    @RelatedTo(elementClass = Resource.class, type = "CONSUMES")
    Set<Resource> consumesResource; // inputs

    @RelatedToVia(elementClass = ConsumesResource.class, type = "CONSUMES")
    Set<ConsumesResource> consumesRelationships;

    public Iterable<Resource> getConsumedResources()
    {
        return this.consumesResource;
    }

    public ConsumesResource addConsumedResource(Resource res)
    {
...

read more »


 
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Michael Hunger  
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 More options Apr 29 2012, 8:53 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Mon, 30 Apr 2012 02:53:44 +0200
Local: Sun, Apr 29 2012 8:53 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
Print | Individual message | Show original | Report this message | Find messages by this author
The problem is that you have the same relationship twice in your class,

once with the @RelatedToVia and once with @RelatedTo

now you add it to both collections and save the entity.

the collection consumesResource is saved first, creating neo4j relationships without any corresponding type information,

then it tries to save consumesRelationships and in between tries to determine existing relationships of this rel-type and fails b/c the existing relationships have not (as expected any java type (in this case ConsumesResource) connected).

if you don't store additional properties on ConsumesResource you don't need it

and then you also don't need the @RelatedToVia collection

in any other case it would be sensible only to fill consumesRelationships when adding Resources, and keeping consumesResource to null which is then ignored.

HTH

Michael

Am 30.04.2012 um 02:34 schrieb Chris:

...

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Chris  
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 More options Apr 30 2012, 9:13 am
From: Chris <chrisb.business.em...@gmail.com>
Date: Mon, 30 Apr 2012 06:13:11 -0700 (PDT)
Local: Mon, Apr 30 2012 9:13 am
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Hi Michael,

Thanks that fixed one of my problems. I haven't put any other properties in
ConsumesResource because I was trying to start simple, I could add some
properties but would like this to be working first. So I also have a
relationship entity ResourceRelationship which is working after your
advice, but when I try connecting a Resource to ResourceService I still
have problems. The relationship entity ConsumesResource has an ID and
appears to be saved.
// from class ResourceService
   public ConsumesResource addConsumedResource(Resource res)
    {
        final ConsumesResource cr = new ConsumesResource(this, res);
        this.consumesRelationships.add(cr);
        return cr;
    }
////
// test method
Resource res = template.save( new Resource("123", "resourceTest") );
ResourceService rservice = template.save( new ResourceService("101",
"resourceService", "me", "http://example.com") );
Resource rez = template.save( new resource("124", "resourceTest2") );

template.save( rservice.addConsumedResource(res) );
template.save( rservice.addConsumedResource(rez) );

ResourceService test =
this.serviceRepository.findByName(rservice.getName()); // this is null..? i
also tried "resourceService"
Iterator<ResourceService> rTest =
this.serviceRepository.findAll().iterator(); // this works...
        while(rTest.hasNext())
        {
            test = rTest.next();
            System.out.println("Service repository service: " +
test.toString()); // prints out resourceService...
            System.out.println("Any Relationships? " +
test.getConsumedResources().iterator().next().toString()); // this prints
out relationship...
        }

In this same test method I tried getting the resource from
resourceRepository just to see what it would return

Resource temp = this.resourceRepository.findByName("resourceTest"); //
gives me the resource

Could this have to do with ResourceService extending service (has name
field)? I'm not sure what's going on..

public interface ResourceServiceRepository extends
GraphRepository<ResourceService>,
                        NamedIndexRepository<ResourceService>,
                        RelationshipOperationsRepository<ResourceService>
{
    ResourceService findById(String id);

    ResourceService findByName(String name);

    Iterable<ResourceService> findByTagsName(String tag);

}

Thanks for all of your help!

...

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Chris  
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 More options Apr 30 2012, 6:13 pm
From: Chris <chrisb.business.em...@gmail.com>
Date: Mon, 30 Apr 2012 15:13:05 -0700 (PDT)
Local: Mon, Apr 30 2012 6:13 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
Print | Individual message | Show original | Report this message | Find messages by this author

I resolved the issue by moving the @Indexed String name field into
ResourceService instead of in Service (ResourceService extends Service).
Now I can get through my unit test of relating the two different nodes. So
I tried searching my other repository and seeing if it got persisted there
and i don't get any errors but all fields are null except the nodeId
(@GraphId). My method above is working with the serviceRepository but when
I search the resourceRepository I get results but all fields are null

Resource temp = this.resourceRepository.findByName("resourceTest");
        Iterator<ResourceService> it =
temp.getConsumesServices().iterator();
        while(it.hasNext())
        {
            ResourceService rs = (ResourceService) it.next();
            System.out.println("Got resource service: " + rs.toString());
            assertEquals("Resource service found", rs.getClass(),
ResourceService.class);
        }

Will print out:
Got resource service: null, null

Even if I had the relationship to the resource it still outputs null.  When
i step thru adding the relationship both start and end nodes are correct
and the relationship has an ID.
template.save( res.addConsumesService(rservice) );

My method getConsumesServices() in my Resource class returns the set of
ResourceServices
@RelatedTo(type = "CONSUMES", direction = BOTH)
Set<ResourceService> consumesServices;

When I step thru getConsumesServices() all values in consumesServices are
null, but they are in there so something must be happening after
template.save() or during the process right? No errors and unit test
passes.. Any help is appreciated, thanks


 
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Michael Hunger  
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 More options Apr 30 2012, 6:37 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Tue, 1 May 2012 00:37:31 +0200
Local: Mon, Apr 30 2012 6:37 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Chris,

sorry I don't really understand your question :) could you state that again?

Perhaps it is best to put your project on github, add the tests and outline those that fail.

Cheers

Michael

Am 30.04.2012 um 15:13 schrieb Chris:

...

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Michael Hunger  
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 More options Apr 30 2012, 6:39 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Tue, 1 May 2012 00:39:42 +0200
Local: Mon, Apr 30 2012 6:39 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Chris,

with inherited fields and @Indexed you can specify on which level you want to index the field, either globally, on the class that defines the field, or the actual current instance.
with @Indexed(level = GLOBAL, CLASS, INSTANCE)

I assume you use simple mapping (no AJ, just spring-data-neo4j).
If you want to have related entities fetched you have to add @Fetch to the collection.

HTH

Michael

Am 01.05.2012 um 00:13 schrieb Chris:


 
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Chris  
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 More options Apr 30 2012, 9:14 pm
From: Chris <chrisb.business.em...@gmail.com>
Date: Mon, 30 Apr 2012 18:14:17 -0700 (PDT)
Local: Mon, Apr 30 2012 9:14 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Hi Michael,

I've never used github, i'll have to look into it.

Maybe i'm using an older version of SDN? @Index(level = GLOBAL) says GLOBAL
cannot be resolved.

I have two repositories, resourceRepository and serviceRepository. I have a
relationship entity ConsumesResource which relates Resource with
ResourceService. Querying the serviceRepository I get the correct
Resources, but if I query the resourceRepository I get null values for the
ResourceService. When I step thru adding the relationship the Resource and
ResourceService (start and end) nodes are correct.

@Test
public void canBeRelated()
{
    // throws not found exception in test method
    Resource res = template.save( new Resource("123", "resourceTest") );
    Resource rez = template.save( new resource("124", "resourceTest2") );
    ResourceService rservice = template.save( new ResourceService("101",
"resourceService", "me", "http://example.com") );
    template.save( rservice.addConsumedResource(res) );
    template.save( rservice.addConsumedResource(rez) );

    ResourceService test =
this.serviceRepository.findByName(rservice.getName());
    Iterator<Resource> ite = test.getConsumedResources().iterator();
    while(ite.hasNext())
    {
        Resource r = (Resource) ite.next();
        System.out.println("Have resource! " + r.toString()); // this works
        assertEquals("Resource found thru service repo", r.getClass(),
Resource.class);
    }

        // template.save( res.addConsumesService(rservice) ); // output
below is still [null, null]

        Resource temp = this.resourceRepository.findByName("resourceTest");
        Iterator<ResourceService> it =
temp.getConsumesServices().iterator();
        while(it.hasNext())
        {
            ResourceService rs = (ResourceService) it.next();
            System.out.println("Got resource service: " + rs.toString());
// All fields in rs are null except for nodeId(@GraphId)
            // output [name, uri] I get: [null, null]
            assertEquals("Resource service found", rs.getClass(),
ResourceService.class);
        }

}

public class ReesourceService extends Service
{
        @RelatedTo(elementClass = Resource.class, type = "CONSUMES")
        Set<Resource> consumesResource; // inputs

       @RelatedToVia(elementClass = ConsumesResource.class, type =
"CONSUMES")
       Set<ConsumesResource> consumesRelationships;

    public Iterable<Resource> getConsumedResources()
        {
            return this.consumesResource;
        }

    public ConsumesResource addConsumedResource(Resource res)
    {
        this.consumesResource.add(res);
        ConsumesResource cr = new ConsumesResource(this, res);
        this.consumesRelationships.add(cr);
        return cr;
    }    
    ...

}

thank you for helping

 
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Michael Hunger  
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 More options Apr 30 2012, 9:25 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Tue, 1 May 2012 03:25:19 +0200
Local: Mon, Apr 30 2012 9:25 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Which version of SDN are you using?

the reason for the behavior you see is that the id is indexed only for Services (b.c. the field is in that class and the default level is Level.CLASS).
If you want to have your ResourceRepository return the resources, you have to use level=Level.INSTANCE.

this is because the two indexes have different names, one is called "Service" the other "Resource" according to your class-names.

Michael

Am 01.05.2012 um 03:14 schrieb Chris:


 
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Chris  
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 More options May 1 2012, 8:08 am
From: Chris <chrisb.business.em...@gmail.com>
Date: Tue, 1 May 2012 05:08:01 -0700 (PDT)
Local: Tues, May 1 2012 8:08 am
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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2.0.1.RELEASE.  Level is working now, thanks.

That was my assumption in my third post, when I tried

this.serviceRepository.findByName("resourceService"); I wouldn't get
anything back - but I could see the service if i did findAll and printed
them out.

so I commented name out in Service class and moved it to ResourceService
which solved the problem - I implemented the INSTANCE level index and is
still working. my serviceRepository is returning the correct resources, but
when I lookup thru the resourceRepository it has ResourceServices but they
are filled with null values. I want to be able to return ResourceServices
from my resourceRepository (not woking), and return Resources from my
serviceRepository (working). It looks like it's a similar problem with the
name field index level, ResourceService is found but is of class Service so
all fields are null?

Really appreciate the help Michael!


 
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Michael Hunger  
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 More options May 1 2012, 8:45 am
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Tue, 1 May 2012 14:45:45 +0200
Local: Tues, May 1 2012 8:45 am
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Chris,

did you see this in my email (2 responses back)? quote:

I assume you use simple mapping (no AJ, just spring-data-neo4j).  If you want to have related entities fetched you have to add @Fetch to the collection.

Michael

Am 01.05.2012 um 14:08 schrieb Chris:


 
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Chris  
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 More options May 1 2012, 12:40 pm
From: Chris <chrisb.business.em...@gmail.com>
Date: Tue, 1 May 2012 09:40:56 -0700 (PDT)
Local: Tues, May 1 2012 12:40 pm
Subject: Re: [Neo4j] Creating relationship - id is null throws org.neo4j.graphdb.NotFoundException
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Ah no i must have missed it, that solved it, thanks!

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