dynamodb 节点 aws-sdk 简单的 getItem() 调用 [英] dynamodb node aws-sdk simple getItem() call

问题描述

伙计们，Javascript 新手...尝试从节点进行简单的发电机查询:

Folks, New to Javascript... trying to do simple dynamo queries from node:

var AWS = require('aws-sdk');
AWS.config.update({region: 'us-east-1'});
var db = new AWS.DynamoDB();

var params = {
"TableName" : 'admins',
"Key" : [
      { "username" : { "S" : "foo" } },
    ],
}

 db.getItem(params, function(err, data) {
    console.log('error: '+ err);
    console.log(data);
    return next();
    res.send(data);
  });
 }

输出:

error: UnexpectedParameter: Unexpected key 'username' found in params.Key['0']

谢谢！任何帮助将不胜感激！

Thanks! Any help would be greatly appreciated!

推荐答案

我尝试按照文档中的建议进行操作，但也出现了错误.

I was trying to do it as it was suggested in the documentation, but also got errors.

最后，以下工作:

var aws = require('aws-sdk');
var db = new aws.DynamoDB({
  region: 'eu-central-1',
  maxRetries: 1
});

exports.handler = event => {
    return queryMyThings();
}

const queryMyThings = async (event) => { 
 var params = {
      Key: {
      "ColumnByWhichYouSearch": {
         S: "ValueThatYouAreQueriing"
        }
      }, 
      TableName: "YourTableName"
     };

    return await db.getItem(params).promise();

}

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