Hmm interesting.
Can you return two of the different nodes side by side?
Do you only have movies in your db?
Michael
Am 14.05.2014 um 13:25 schrieb Manuel Moraga <manuel.moraga.dro...@gmail.com>:
> I have already posted this on StackOverflow, but haven't gotten any answers.
> I suspect there may be a bug involved, or it's just a gotcha that I must have
> missed somewhere. I have tried everything I could think of, and checked the
> documentation but still can't find the reason why my nodes can't be mapped
> even after adding the correct primary SDN label.
>
> I'm running SDN 3.0.2.RELEASE and neo4j 2.0.3 on arch linux x64 with Oracle
> Java 1.8.0_05
>
> Trying to retrieve nodes in SDN, imported using the Neo4j CSV Batch Importer,
> gives the java.lang.IllegalStateException:
>
> java.lang.IllegalStateException: No primary SDN label exists .. (i.e one with
> starting with _)
> This is after having added a new label through a cypher query:
>
> match (n:Movie) set n:_Movie;
> Inspecting nodes created through SDN shows they have the same labels. The
> result when running
>
> match (n) where id(n)={nodeId} return labels(n) as labels;
> as found in LabelBasedStrategyCypher.java is the same for both:
>
> ["Movie","_Movie"]
> Saving and retrieving nodes thorugh SDN works without any issues. I must be
> missing something as I got the impression that setting the appropiate labels
> should be enough.
>
> My CSV file looks like this. The appId is only used to assure the node is the
> same that we have stored earlier, as the internal nodeId is Garbage collected
> and new nodes could get old nodeIds after the old ones are deleted. The
> nodeId is used for actual lookups and for connecting relationships and so on.
>
> appId:int l:label title:string:movies year:int
> 1 Movie Dinosaur Planet 2003
> 2 Movie Isle of Man TT 2004 Review 2004
> I have made more tests, checking the source of
> LabelBasedNodeTypeRepresentationStrategy to see what is going wrong. Running
> the readAliasFrom() method that the Exception is thrown from does not return
> any errors:
>
> String query = "start n=node({id}) return n";
> Node node = null;
> for(Node n : neo4jTemplate.query(query,params).to(Node.class)){
> node = n;
> }
>
> // when running the readAliasFrom method manually the label is returned
> correctly
> LabelBasedNodeTypeRepresentationStrategy strategy = new
>
> LabelBasedNodeTypeRepresentationStrategy(neo4jTemplate.getGraphDatabase());
> System.out.println("strategy returns: "
> +(String)strategy.readAliasFrom(node));
>
> // trying to convert the node to a movie object, however throws the Illegal
> State Exception
> Movie movie = null;
> movie = neo4jTemplate.convert(node,Movie.class);
> So, the _Movie label exists, running the readAliasFrom() method manually
> doesn't throw Exceptions but trying to convert the node into a Movie does.
> Nodes created from SDN do not have these issues, even if they look identical
> to me.
>
> /Manuel
>
>
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