JanusGraph•5mo ago

Support to query vertex with custom id in Gremlin.Net SDK

@Florian Hockmann I am exploring usage of custom vertex id in our graph, when I play around with C# SDK v3.7.1 to query a vertex which has custom identifier and property added to the vertex, I get an exception:

No serializer found for type 'janusgraph.RelationIdentifier'.
Stacktrace attached.

No serializer found for type 'janusgraph.RelationIdentifier'.
Stacktrace attached.

Also attached is the image of the graph vertex in gdotv:

{
  "id" : "custom_vid_002",
  "label" : "vertex",
  "properties" : [ {
    "key" : "foo",
    "value" : "fooVal",
    "metaPropertyOf" : null,
    "id" : "sq-Scustom_vid_002-sl",
    "cardinality" : "single",
    "gdotvObjectType" : "property"
  }

{
  "id" : "custom_vid_002",
  "label" : "vertex",
  "properties" : [ {
    "key" : "foo",
    "value" : "fooVal",
    "metaPropertyOf" : null,
    "id" : "sq-Scustom_vid_002-sl",
    "cardinality" : "single",
    "gdotvObjectType" : "property"
  }

Has the support for custom vertex id been added to the SDK? (I am able to use the SDK to add a vertex which has custom id, but without any properties.)

message.txt

Solution:

They are included in the NuGet package JanusGraph.Net, but you still have to use them in your code. Did you create the client as shown in the README? https://github.com/JanusGraph/janusgraph-dotnet/?tab=readme-ov-file#usage Since you're using GraphBinary, you should create the client like this: ...

GitHub

GitHub - JanusGraph/janusgraph-dotnet: JanusGraph .NET Gremlin Lang...

JanusGraph .NET Gremlin Language Variant (GLV). Contribute to JanusGraph/janusgraph-dotnet development by creating an account on GitHub.

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3 Replies

gdotv•5mo ago

Are you using the right IoRegistry in your C# code (JanusGraphIoRegistry), and using the right JanusGraph driver version? I've ran into this issue before and it was due to a mismatch in JanusGraph driver version leading to serialization issues.

vipulkashyap•5mo ago

I think those are bundled up as part of the SDK

Solution

Florian Hockmann•5mo ago

c#
var client = new GremlinClient(new GremlinServer("localhost", 8182),
    new GraphBinaryMessageSerializer(JanusGraphTypeSerializerRegistry.Instance));

c#
var client = new GremlinClient(new GremlinServer("localhost", 8182),
    new GraphBinaryMessageSerializer(JanusGraphTypeSerializerRegistry.Instance));

GitHub

GitHub - JanusGraph/janusgraph-dotnet: JanusGraph .NET Gremlin Lang...

JanusGraph .NET Gremlin Language Variant (GLV). Contribute to JanusGraph/janusgraph-dotnet development by creating an account on GitHub.

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Support to query vertex with custom id in Gremlin.Net SDK