Node.js AWS CloudSearch上载JSON:值标记不能是数组或对象

我正在运行lambda函数（NodeJS）将一些文档上传到AWS云搜索。我一直得到以下错误

{
    "errorMessage": "{ [\"The value of tags cannot be a JSON array or object\"] }",
    "errorType": "DocumentServiceException",
    "stackTrace": [
        "Object.extractError (/var/task/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
        "Request.extractError (/var/task/node_modules/aws-sdk/lib/protocol/rest_json.js:37:8)",
        "Request.callListeners (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
        "Request.emit (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
        "Request.emit (/var/task/node_modules/aws-sdk/lib/request.js:678:14)",
        "Request.transition (/var/task/node_modules/aws-sdk/lib/request.js:22:10)",
        "AcceptorStateMachine.runTo (/var/task/node_modules/aws-sdk/lib/state_machine.js:14:12)",
        "/var/task/node_modules/aws-sdk/lib/state_machine.js:26:10",
        "Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:38:9)",
        "Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:680:12)"
    ]
}

这是我用来上传数据的代码

exports.handle = function(e, ctx, cb) {
  ctx.callbackWaitsForEmptyEventLoop = false;
  var documentsBatch = e.data;
  var params = {
    contentType: 'application/json',
    documents: JSON.stringify(documentsBatch)
  };
  var req = cloudsearchdomain.uploadDocuments(params, function(err, data) {
    if (err){
      // an error occurred
      cb(err, null);
    }else{
      // successful response
    }
  });
  req.send();
}

我的字符串化数据在记录时看起来与

[
{
“类型”：“添加”，
“id”：“FpgAxxxxKrM4utxosPy23--KhO6FgvxK”，
“字段”：{
“userid”：“FpgARscKlxaxutxosPy23”，
“故事ID”：“-khxbp7reek”，
“description”：“xyz问题在于另一个JSON对象具有字段以外的附加JSON属性。一旦我能够找到并删除它，一切都正常了。应该有一个相同的linter，或者SDK应该抛出一个更好的异常

exports.handle = function(e, ctx, cb) {
  ctx.callbackWaitsForEmptyEventLoop = false;
  var documentsBatch = e.data;
  var params = {
    contentType: 'application/json',
    documents: JSON.stringify(documentsBatch)
  };
  var req = cloudsearchdomain.uploadDocuments(params, function(err, data) {
    if (err){
      // an error occurred
      cb(err, null);
    }else{
      // successful response
    }
  });
  req.send();
}