Apache TinkerPopAT
Apache TinkerPop•2y ago
danielcraig23

.mergeV() with Javascript not working

Hi, I have a nodeJS 18 lambda which is closely modeled after this documentation: https://docs.aws.amazon.com/neptune/latest/userguide/lambda-functions-examples.html#lambda-functions-examples-javascript

here is my async query function: 
async function query(context) {
    const { userId } = context;
    return g
        .mergeV(new Map([[t.id, userId]]))
        .option(
            merge.onCreate,
            new Map([
                [t.label, 'myLabel']
            ])
        )
        .next();
}


This code produces the following vertex, without using the userId or label which I provided: 
gremlin> g.V().elementMap()
==>[id:84c77791-6b38-6c39-c63a-4f0a84d3058e,label:vertex]


How can I troubleshoot this function? I'm using Neptune 1.2.1.0 with a nodeJs 18 lambda and here is an excerpt from my package.json and yarn.lock which shows the gremlin versions which yarn resolved for my project 
    "dependencies": {
        "date-fns": "^2.30.0",
        "gremlin": "3.6.2",
        "gremlin-aws-sigv4": "^3.6.1"
    }


"gremlin-aws-sigv4@npm:^3.6.1":
  version: 3.6.1
  resolution: "gremlin-aws-sigv4@npm:3.6.1"
  dependencies:
    aws4: ^1.11.0
    debug: ^4.3.4
    gremlin: ^3.6.1
  checksum: 51e574db25ecf7c046e257b30d2b43ef18ef09e7564558bc2b40452ac0db2ce85eee556074bd4cbe5d02f554e9c995264377498cfc78ff3b4713e0dd7bcd480d
  languageName: node
  linkType: hard

"gremlin@npm:3.6.2":
  version: 3.6.2
  resolution: "gremlin@npm:3.6.2"
  dependencies:
    ws: ^8.11.0
  checksum: c70c08ee108e9437afc81d6a945f66f5756c5dc09dd2772026d41bced952d5564c6f61e87066f3c807fb0f8c8af290ac399962c866f2b4695c0953d4e9113428
  languageName: node
  linkType: hard

"gremlin@npm:^3.6.1":
  version: 3.7.1
  resolution: "gremlin@npm:3.7.1"
  dependencies:
    ws: ^8.11.0
  checksum: e1a9cbf0bbcade9e66b9b9b5c3e51c15314e55fec5dba2dd8d3f309cff18b0ae4bffbfbf9e7c239054454b6060bc6aecb787e10af168f114722660d0ad049753
  languageName: node
  linkType: hard
AWS Lambda function examples for Amazon Neptune - Amazon Neptune
The following example AWS Lambda functions, written in Java, JavaScript and Python, illustrate upserting a single vertex with a randomly generated ID using the fold().coalesce().unfold() idiom.
Solution
The solution was to allow neptune to use the default mimetype; removing the mimetype header solved the issue
Jump to solution
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