[
https://issues.apache.org/jira/browse/TINKERPOP-2331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17060957#comment-17060957
]
Stephen Mallette commented on TINKERPOP-2331:
---------------------------------------------
I'm not sure if this is still an issue for you, but I gave this a test and
can't say that I can recreate the problem. Your sample graph is missing an edge
so your failing query would return no results in the console or otherwise. I
decided to just recreate the traversal using the standard modern toy dataset
and it worked fine on 3.4-dev branch which is still about even with 3.4.6 at
this point i think:
{code}
g.V().Has("person", "name", "marko").As("a")
.Out("xxx").Has("person", "name", "josh").As("b")
.Select<object>("a", "b").By(__.ValueMap<object,
object>(true)).ToList()
{code}
Perhaps the issue is resolve now? or perhaps I didn't properly capture the
nature of the failure in my test?
> Select(<multiple keys>).By(__ValueMap(true)) throws "Unable to cast" exception
> ------------------------------------------------------------------------------
>
> Key: TINKERPOP-2331
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2331
> Project: TinkerPop
> Issue Type: Bug
> Components: dotnet
> Affects Versions: 3.4.4
> Reporter: Tom Brown
> Priority: Major
>
> It looks like dotnet version does not support selecting multiple vertices by
> aliases and following syntax always throws an exception
> Select("key1", "key2").By(__.ValueMap(true))
> System.InvalidCastException: 'Unable to cast object of type
> 'System.Collections.Generic.Dictionary`2[System.Object,System.Object]' to
> type 'Gremlin.Net.Structure.Vertex'.'
>
> *Steps to reproduce:*
> _1. Create following test graph_
> graph = TinkerGraph.open();
> g = graph.traversal();
> g.addV().property("name", "B").
> addV().property("name", "A");
>
> _2. Query from Gremlin console to verify that query syntax is OK_
> g.V().has("name", "A").as("a").out().has("name", "B").as("b").select("a",
> "b").by(valueMap(true))
>
> _3. Query from .net to get an exception_
> g.V().Has("name", "A").As("a").Out().Has("name",
> "B").as("b").Select<object>("a", "b").By(__.ValueMap<object,
> object>(true)).ToList()
>
> *Hack fix that works*
> My hacky fix was to create "ByDictionary" method similar to "By", but I could
> not figure out how to add a proper override to "By"
> public GraphTraversal<S, Dictionary<object, object>> ByDictionary(ITraversal
> traversal)
> {
> Bytecode.AddStep("by", traversal);
> return Wrap<S, Dictionary<object, object>>(this);
> }
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
