On Wed, Mar 2, 2011 at 12:14 PM, Peter Neubauer <[email protected]> wrote: > Well, > you can set the reference node to anything, so you could do > > graph.delete(); > newRoot = neo4j.createNode(); > neo4j.setReferenceNode(newRoot);
I bet this is the problem: the reference node gets deleted. I one of solving it would be not to delete the ref node at all. The other way is as you have outlined here, I'm just not sure that there's a method setReferenceNode().... (at least could not find it). Also - where is Marko? It would be great to have your opinion on whats happening from the point of view of blueprints neo4j impl. Alfredas > > Cheers, > > /peter neubauer > > GTalk: neubauer.peter > Skype peter.neubauer > Phone +46 704 106975 > LinkedIn http://www.linkedin.com/in/neubauer > Twitter http://twitter.com/peterneubauer > > http://www.neo4j.org - Your high performance graph database. > http://startupbootcamp.org/ - Öresund - Innovation happens HERE. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > > > > On Wed, Mar 2, 2011 at 12:10 PM, Craig Taverner <[email protected]> wrote: >> Is this not because blueprints does not respect the neo4j reference node, >> and so deletes it (really clears the graph). Is there a way to create the >> reference node again? Perhaps as simple as db.createNode(), and the first >> will be node 0? >> >> On Wed, Mar 2, 2011 at 12:08 PM, Peter Neubauer < >> [email protected]> wrote: >> >>> Mmh, >>> have you committed the transaction after your clear, and How are you >>> trying to create the Relationship? It seems you are trying to use Node >>> 0 for it, which you have deleted before? In that case, you need to add >>> a new node and use that as the starting point for your relationship? >>> >>> Cheers, >>> >>> /peter neubauer >>> >>> GTalk: neubauer.peter >>> Skype peter.neubauer >>> Phone +46 704 106975 >>> LinkedIn http://www.linkedin.com/in/neubauer >>> Twitter http://twitter.com/peterneubauer >>> >>> http://www.neo4j.org - Your high performance graph database. >>> http://startupbootcamp.org/ - Öresund - Innovation happens HERE. >>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. >>> >>> >>> >>> On Wed, Mar 2, 2011 at 11:44 AM, Alfredas Chmieliauskas >>> <[email protected]> wrote: >>> > Dear all, >>> > >>> > a crazy primitive question. How do I clear a graph (without doing rm -f) >>> ? >>> > If I delete all the nodes and relationships or use blueprints >>> > graph.clear() I get a weird error later when adding new nodes: >>> > >>> > Caused by: java.lang.IllegalStateException: First node[0] is deleted >>> > and cannot be used to create a relationship >>> > at >>> org.neo4j.kernel.impl.nioneo.xa.WriteTransaction.relationshipCreate(WriteTransaction.java:1475) >>> > at >>> org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaConnection$RelationshipEventConsumerImpl.createRelationship(NeoStoreXaConnection.java:257) >>> > at >>> org.neo4j.kernel.impl.nioneo.xa.NioNeoDbPersistenceSource$NioNeoDbResourceConnection.relationshipCreate(NioNeoDbPersistenceSource.java:371) >>> > at >>> org.neo4j.kernel.impl.persistence.PersistenceManager.relationshipCreate(PersistenceManager.java:154) >>> > at >>> org.neo4j.kernel.impl.core.NodeManager.createRelationship(NodeManager.java:310) >>> > at >>> org.neo4j.kernel.impl.core.NodeImpl.createRelationshipTo(NodeImpl.java:388) >>> > at >>> org.neo4j.kernel.impl.core.NodeProxy.createRelationshipTo(NodeProxy.java:187) >>> > at >>> org.neo4j.util.GraphDatabaseUtil.getOrCreateSingleOtherNode(GraphDatabaseUtil.java:137) >>> > at >>> org.neo4j.util.GraphDatabaseUtil.getOrCreateSubReferenceNode(GraphDatabaseUtil.java:167) >>> > at >>> org.neo4j.util.GraphDatabaseUtil.getOrCreateSubReferenceNode(GraphDatabaseUtil.java:150) >>> > at >>> org.springframework.data.graph.neo4j.support.GraphDatabaseContext.getOrCreateSubReferenceNode(GraphDatabaseContext.java:275) >>> > at >>> org.springframework.data.graph.neo4j.support.SubReferenceNodeTypeStrategy.obtainSubreferenceNode(SubReferenceNodeTypeStrategy.java:167) >>> > at >>> org.springframework.data.graph.neo4j.support.SubReferenceNodeTypeStrategy.postEntityCreation(SubReferenceNodeTypeStrategy.java:66) >>> > at >>> org.springframework.data.graph.neo4j.support.GraphDatabaseContext.postEntityCreation(GraphDatabaseContext.java:219) >>> > at >>> org.springframework.data.graph.neo4j.fieldaccess.NodeEntityStateAccessors.createAndAssignState(NodeEntityStateAccessors.java:54) >>> > at >>> org.springframework.data.graph.neo4j.fieldaccess.DetachableEntityStateAccessors.createAndAssignState(DetachableEntityStateAccessors.java:113) >>> > at >>> org.springframework.data.graph.neo4j.support.node.Neo4jNodeBacking.ajc$before$org_springframework_data_graph_neo4j_support_node_Neo4jNodeBacking$1$74591ff9(Neo4jNodeBacking.aj:84) >>> > >>> > Also I'm using Spring Data Graph to create new nodes and relations. >>> > >>> > Any ideas? >>> > >>> > Alfredas >>> > _______________________________________________ >>> > Neo4j mailing list >>> > [email protected] >>> > https://lists.neo4j.org/mailman/listinfo/user >>> > >>> _______________________________________________ >>> Neo4j mailing list >>> [email protected] >>> https://lists.neo4j.org/mailman/listinfo/user >>> >> _______________________________________________ >> Neo4j mailing list >> [email protected] >> https://lists.neo4j.org/mailman/listinfo/user >> > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
