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https://issues.apache.org/jira/browse/TINKERPOP-1036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15053763#comment-15053763
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ASF GitHub Bot commented on TINKERPOP-1036:
-------------------------------------------
Github user laxatives commented on the pull request:
https://github.com/apache/incubator-tinkerpop/pull/175#issuecomment-164073855
Sounds great. Is there any reason the GraphSONReader/Writer would behave
differently from the test environment and gremlin.sh? I'm fairly certain I am
failing the case above (read graph only has 1 edge) while executing from
gremlin.sh. This issue came up because I am converting a graph into a gson file
for every vertex and for every edge, but self edges are consistently missing. I
have been working off of tp31, but this still occurs in gremlin.sh of the
master branch.
> Support self-looping edges in IO
> --------------------------------
>
> Key: TINKERPOP-1036
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1036
> Project: TinkerPop
> Issue Type: Bug
> Components: io
> Affects Versions: 3.1.0-incubating
> Reporter: stephen mallette
> Assignee: stephen mallette
> Fix For: 3.1.1-incubating
>
>
> Seems like GraphSON is having trouble with self-loops. Not sure about other
> IO at this time.
> {code}
> gremlin> a = TinkerGraph.open()
> ==>tinkergraph[vertices:0 edges:0]
> gremlin> v1 = a.addVertex()
> ==>v[0]
> gremlin> v2 = a.addVertex()
> ==>v[1]
> gremlin> control = v1.addEdge("CONTROL", v2)
> ==>e[2][0-CONTROL->1]
> gremlin> selfLoop = v1.addEdge("SELF-LOOP", v1)
> ==>e[3][0-SELF-LOOP->0]
> gremlin> a.io(IoCore.graphson()).writeGraph("test.gson")
> ==>null
> gremlin> b = TinkerGraph.open()
> ==>tinkergraph[vertices:0 edges:0]
> gremlin> b.io(IoCore.graphson()).readGraph("test.gson")
> ==>null
> gremlin> b.traversal().E()
> ==>e[2][0-CONTROL->1]
> {code}
> with graphson of:
> {code}
> {"id":0,"label":"vertex","inE":{"SELF-LOOP":[{"id":3,"outV":0}]},"outE":{"CONTROL":[{"id":2,"inV":1}]}}
> {"id":1,"label":"vertex","inE":{"CONTROL":[{"id":2,"outV":0}]}}
> {code}
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