迪纳摩坏阿比异常

Question

我现在有一个表：

{ 
    "AttributeDefinitions": [ 
    { 
     "AttributeName": "soAssetId", 
     "AttributeType": "N" 
    }, 
    { 
     "AttributeName": "timestamp", 
     "AttributeType": "N" 
    } 
    ], 
    "TableName": "odm-rates", 
    "KeySchema": [ 
    { 
     "AttributeName": "soAssetId", 
     "KeyType": "HASH" 
    }, 
    { 
     "AttributeName": "timestamp", 
     "KeyType": "RANGE" 
    } 
    ], 
    "TableStatus": "ACTIVE", 
    "CreationDateTime": "2017-10-15T15:24:14.470Z", 
    "ProvisionedThroughput": { 
    "LastIncreaseDateTime": "1970-01-01T00:00:00.000Z", 
    "LastDecreaseDateTime": "1970-01-01T00:00:00.000Z", 
    "NumberOfDecreasesToday": 0, 
    "ReadCapacityUnits": 5, 
    "WriteCapacityUnits": 5 
    }, 
    "TableSizeBytes": 0, 
    "ItemCount": 0, 
    "TableArn": "arn:aws:dynamodb:ddblocal:000000000000:table/odm-rates", 
    "GlobalSecondaryIndexes": [ 
    { 
     "IndexName": "rateRange", 
     "KeySchema": [ 
     { 
      "AttributeName": "soAssetId", 
      "KeyType": "HASH" 
     }, 
     { 
      "AttributeName": "timestamp", 
      "KeyType": "RANGE" 
     } 
     ], 
     "Projection": { 
     "ProjectionType": "ALL" 
     }, 
     "IndexStatus": "ACTIVE", 
     "ProvisionedThroughput": { 
     "ReadCapacityUnits": 5, 
     "WriteCapacityUnits": 5 
     }, 
     "IndexSizeBytes": 0, 
     "ItemCount": 0, 
     "IndexArn": "arn:aws:dynamodb:ddblocal:000000000000:table/odm-rates/index/rateRange" 
    } 
    ] 
} 

当我尝试写：

dynamo.batchWriteItem({ 
       RequestItems: { 
       "odm-rates": [{}, 
        { 
        PutRequest: { 
         Item: { 
          "soAssetId": { N: "143" }, 
          "value": { S: "13423423" }, 
          "bidValue": { S: "234234234" }, 
          "askValue": { S: "5433434343" }, 
          "timestamp": { N: "324234234" } 
         } 
        } 
        } 
       ] 
       } 
      }, function(err, data) { 
    console.log("LOG"); 
    if (err) console.log(err); 
    else console.log(data); 
}); 

我得到以下异常：

{ ValidationException: Supplied AttributeValue has more than one datatypes set, must contain exactly one of the supported datatypes 
    at Request.extractError (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/protocol/json.js:48:27) 
    at Request.callListeners (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/sequential_executor.js:105:20) 
    at Request.emit (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/sequential_executor.js:77:10) 
    at Request.emit (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/request.js:683:14) 
    at Request.transition (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/request.js:22:10) 
    at AcceptorStateMachine.runTo (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/state_machine.js:14:12) 
    at /sites/nsfxpricer/node/node_modules/aws-sdk/lib/state_machine.js:26:10 
    at Request.<anonymous> (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/request.js:38:9) 
    at Request.<anonymous> (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/request.js:685:12) 
    at Request.callListeners (/sites/nsfxpricer/node/node_modules/aws-sdk/lib/sequential_executor.js:115:18) 
    message: 'Supplied AttributeValue has more than one datatypes set, must contain exactly one of the supported datatypes', 
    code: 'ValidationException', 
    time: 2017-10-15T16:10:16.201Z, 
    requestId: '61bdb8cc-cb17-401a-b461-c22f2efd7454', 
    statusCode: 400, 
    retryable: false, 
    retryDelay: 36.32793383670548 } 

我已经试过像插入数据有200种不同的方式，但实际的异常似乎与潜在的问题完全无关。官方的API简直是poo-poo？我如何正确创建二级索引？

Answer 1

您的语法错误batchwriteitems是错误的。您需要指定您正在执行的操作类型以及批处理写入。

请查看文档，

http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchWriteItem.html

例如，

"RequestItems": { 
     "Forum": [ 
      { 
       "PutRequest": { 
        "Item": { 
         "Name": { 
          "S": "Amazon DynamoDB" 
         }, 
         "Category": { 
          "S": "Amazon Web Services" 
         } 
        } 
       } 
      }, 
      { 
       "PutRequest": { 
        "Item": { 
         "Name": { 
          "S": "Amazon RDS" 
         }, 
         "Category": { 
          "S": "Amazon Web Services" 
         } 
        } 
       } 
      } 
]} 

希望它能帮助。