Question

指定了散列和范围，但它认为一个是空的？还是在谈论其他一些属性？

返回的task.result（）为nil，task.error（）表示：

“Error Domain = com.amazonaws.AWSDynamoDBErrorDomain Code = 0”提供 AttributeValue为空，必须包含其中一个支持的数据类型“UserInfo = 0x7ff3c0e21d40 {NSLocalizedDescription =提供 AttributeValue为空，必须包含其中一个支持的数据类型}“

我确信哈希和范围名称是正确的，表名也是正确的。

在Swift中写道，这是我的代码：

var venueIdAttribute = AWSDynamoDBAttributeValue()
venueIdAttribute.N = "2164156"

var venueIdCondition = AWSDynamoDBCondition()
venueIdCondition.comparisonOperator = .EQ // Hash Key must always be Equals
venueIdCondition.attributeValueList = [venueIdAttribute]

var startDateAttribute = AWSDynamoDBAttributeValue()
var startString = String(format:"%1.0f", lastSyncDate.timeIntervalSince1970 * 1000)
startDateAttribute.N = String(format:"%1.0f", lastSyncDate.timeIntervalSince1970 * 1000)

var dateCondition = AWSDynamoDBCondition()
dateCondition.comparisonOperator = .GT
dateCondition.attributeValueList = [startDateAttribute];

var keysArray : NSArray = [["venueId" : venueIdCondition, "dateInterval" : dateCondition]]
var keysAndAttributes : AWSDynamoDBKeysAndAttributes = AWSDynamoDBKeysAndAttributes()
keysAndAttributes.keys = keysArray;

var requestMap : NSDictionary = ["myTableName":keysAndAttributes]

var request : AWSDynamoDBBatchGetItemInput = AWSDynamoDBBatchGetItemInput()
request.requestItems = requestMap

var response : BFTask = dynamoDB.batchGetItem(request)  // This is synchronous

Answer 1

keysArray在代码段中格式不正确。您正在创建NSString：AWSDynamoDBCondition字典，但它必须是NSString：AWSDynamoDBAttributeValue字典。以下参考可能有助于了解如何格式化BatchGetItem请求。

DynamoDB batchGetItem返回错误：＆＃34;提供的AttributeValue为空＆＃34;

1 个答案: