dynamodb節點AWS-SDK簡單的getItem（）調用

Question

夥計們，新的JavaScript ...試圖從節點做簡單的發電機查詢：

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); 
    }); 
} 

輸出：

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

謝謝！任何幫助將不勝感激！

Answer 1

必須遵循的SDK和文檔，其簡單： http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_GetItem.html

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

    db.getItem(params, function(err, data) { 
    if (err) { 
     console.log(err); // an error occurred 
     } 
    else { 
     console.log(data); // successful response 
     res.send(data); 
     } 
    return next(); 
    }); 

Answer 2

下面是使用節點JS的DynamoDB重要的資源：

入門指南： http://docs.aws.amazon.com/amazondynamodb/latest/gettingstartedguide/GettingStarted.NodeJs.html

文件建立和實例： http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html

如果您使用的DocumentClient：在JavaScript

http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html