爲什麼getItem（）返回「Invalid attribute value type」？

Question

我想從DynamoDB AWS獲取單個項目，但無法弄清楚如何使用散列和範圍鍵指定它。下面是是describeTable和掃描輸出：

// describeTable output: 
{ 
    "Table": { 
    "AttributeDefinitions": [ 
     { 
     "AttributeName": "timepost", 
     "AttributeType": "N" 
     }, 
     { 
     "AttributeName": "addr", 
     "AttributeType": "S" 
     } 
    ], 
    "TableName": "Scratch", 
    "KeySchema": [ 
     { 
     "AttributeName": "timepost", 
     "KeyType": "HASH" 
     }, 
     { 
     "AttributeName": "addr", 
     "KeyType": "RANGE" 
     } 
    ], 
    "TableStatus": "ACTIVE", 
    "CreationDateTime": "2017-08-24T07:08:19.650Z", 
    "ProvisionedThroughput": { 
     "LastIncreaseDateTime": "1970-01-01T00:00:00.000Z", 
     "LastDecreaseDateTime": "1970-01-01T00:00:00.000Z", 
     "NumberOfDecreasesToday": 0, 
     "ReadCapacityUnits": 5, 
     "WriteCapacityUnits": 5 
    }, 
    "TableSizeBytes": 32, 
    "ItemCount": 1, 
    "TableArn": "arn:aws:dynamodb:ddblocal:000000000000:table/Scratch" 
    } 
} 

// scan output: 
{ 
    "Items": [ 
    { 
     "addr": "1.1.1.1:443", 
     "ms": 67, 
     "timepost": 12321340 
    } 
    ], 
    "Count": 1, 
    "ScannedCount": 1 
} 

，這裏是我的getItem（）代碼和錯誤輸出：

docClient.get({ 
    TableName: "Scratch", 
    Key: { 
     timepost: {N: '12321340'}, 
     addr: {S: '1.1.1.1:443'} 
    }}, opComplete); 

err: { 
    "message": "Invalid attribute value type", 
    "code": "ValidationException", 
    "time": "2017-08-26T15:56:59.938Z", 
    "requestId": "f9d94f20-f22d-4141-be06-2eaba1eee5a1", 
    "statusCode": 400, 
    "retryable": false, 
    "retryDelay": 26.507308215655236 
} 

我在做什麼錯？

Answer 1

@RichAmberale，嘗試指定類型相同，關鍵的架構定義，即

docClient.get({ 
    TableName: "Scratch", 
    Key: { 
     timepost: {HASH: '12321340'}, 
     addr: {RANGE: '1.1.1.1:443'} 
    }}, opComplete); 

Answer 2

想通了：

docClient.get({ 
    TableName: "Scratch", 
    Key: { 
     timepost: 12321340, 
     addr: '1.1.1.1:443' 
    }}, opComplete); 

這是我在什麼工作我使用的。適用於Javascript的AWS SDK版本2.102.0，以防有所作爲。