Neo4J: readAliasFrom throws exception on empty graph

[JeitEmgie]

org.springframework.data.neo4j.support.typerepresentation.AbstractIndexingTypeRepresentationStrategy

    @Override
    public Object readAliasFrom(S propertyContainer) {
        if (propertyContainer == null)
            throw new IllegalArgumentException("Relationship or Node is null");
        return propertyContainer.getProperty(TYPE_PROPERTY_NAME);
    }

On an empty graph:
while the query works in Console

start n=node(*) return n;
==> +-----------+
==> | n         |
==> +-----------+
==> | Node[0]{} |
==> +-----------+

The same query executed thru Cypher with

@Query("start n=node(*) return n")

doesn't catch the exception thrown by org.neo4j.rest.graphdb.entity.RestEntity.getProper ty while querying from the __type__ property that doesn't exist in an empty graph.

[lassewesth]

JeitEmgie,

That seems like a valid issue - can I get you to write that up in a ticket over here: https://jira.springsource.org/browse/DATAGRAPH

Thanks,

Lasse

[MichaelHunger]

Actually the method should return null, if there is no TYPE_PROPERTY_NAME property on a certain node or rel.