Well, reference nodes are not part of the Blueprints API. Neo4j is not decided yet how and if to change the reference node approach. Either make it a setup option, keep it, or remove it totally.
Marko is coming over in April, so there will be fighting at the Malmö office over this :) 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 Thu, Mar 3, 2011 at 12:12 PM, Alfredas Chmieliauskas <[email protected]> wrote: > 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 > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
