'NoneType' object is not iterable

[arthurk]

When trying to execute the following code:

james = g.vertices.create({'name':'James'})
julie = g.vertices.create({'name':'Julie'})
g.edges.create(james,"knows",julie)

g.V

The following exception is raised:

TypeError: 'NoneType' object is not iterable

I'm using Bulbs 0.2.2, Gremlin 1.5 and Rexster 0.8 with Neo4j as a backend.

[espeed]

Hi Arthur -

Make sure you enable the Gremlin extension in your rexster.xml:

        <extensions>                                                             
            <allows>                                                                                    
              <allow>tp:gremlin</allow>                                            
            </allows>                                                                
        </extensions>  

I just tried this on Linux using the 0.2.2 from PyPi:

>>> g = Graph('http://localhost:8182/graphs/neo4jsample')
>>> james = g.vertices.create({'name':'James'})
julie = g.vertices.create({'name':'Julie'})
>>> g.edges.create(james,"knows",julie)
<Edge: http://localhost:8182/graphs/neo4jsample/edges/0>
>>> g.V
[{'_type': 'vertex', '_id': 1, 'name': 'James'}, {'_type': 'vertex', '_id': 2, 'name': 'Julie'}]

You can also view the results in your Web browser:

http://localhost:8182/graphs/neo4jsample

{"version":"0.8-SNAPSHOT","name":"neo4jsample","graph":"neo4jgraph[EmbeddedGraphDatabase [\/tmp\/rexster-graph]]","readOnly":false,"type":"com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jGraph","queryTime":0.446298,"upTime":"0[d]:00[h]:04[m]:46[s]"}

http://localhost:8182/graphs/neo4jsample/vertices

{"version":"0.8-SNAPSHOT","results":[{"name":"James","_id":1,"_type":"vertex"},{"name":"Julie","_id":2,"_type":"vertex"}],"totalSize":2,"queryTime":0.707539}

Bulbs 0.3 is about to be released -- the code is on GitHub master. I'm working on the 0.3 docs, and when they are online, I'll switch PyPi to 0.3.

[arthurk]

ah, yes, the gremlin extension wasn't enabled.

Thank you for the fast and helpful response!