Custom Resolver - Unsupported operation 'BatchDeleteItem'/'BatchPutItem'

Hi,

I’ve written a custom resolver with BatchPutItemand BatchDeleteItem. Everytime I run a mutation with this resolver I get

{
  "data": {
    "batchDeleteBusinessList": null
  },
  "errors": [
    {
      "path": [
        "batchDeleteBusinessList"
      ],
      "data": null,
      "errorType": "MappingTemplate",
      "errorInfo": null,
      "locations": [
        {
          "line": 38,
          "column": 3,
          "sourceName": null
        }
      ],
      "message": "Unsupported operation 'BatchDeleteItem'."
    }
  ]
}

or "message": "Unsupported operation 'BatchPutItem'."

• req

#set($ids = [])
#foreach($id in ${ctx.args.input})
    #set($pkey = {})
    $util.qr($pkey.put("id", $util.dynamodb.toString($id)))
    $util.qr($ids.add($pkey))
#end
{
  "version": "2018-05-29",
  "operation": "BatchDeleteItem",
  "tables": {
      "BusinessList-dzqohgcrhvhptkhcfvrvlkxdsy-dev": $utils.toJson($ids)
  }
}

• Mutation.batchDelete.res.vtl.

#if ($ctx.error)
    $util.appendError($ctx.error.message, $ctx.error.type)
#end
$util.toJson($ctx.result.data["BusinessList-dzqohgcrhvhptkhcfvrvlkxdsy-dev"])

• Mutation.batchDelete.res.vtl

  batchDeleteBusinessList(input: [
    "c279aa14-0f68-4a26-a18f-bb854cb185c9",
    "8465e9f1-765c-43a6-9b19-a6b73b7fb762"
  ]) {
    id
  }

Any ideas?

[SwaySway]

You can check if this is enabled by checking your transformer.conf.json if it contains a ResolverConfig set up. I was able to get this working on a project that does not have conflict detection enabled and I was able to reproduce this issue on a project with this enabled.

To clarify why this might be related is because using Batch Operations with Conflict Detection is not supported. Read more here: https://docs.aws.amazon.com/appsync/latest/devguide/conflict-detection-and-sync.html

Should conflict detection not be enabled and you are still running into this Unsupported Operation Issue please comment below.

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