ios - Dynamo DB iOS dynamoDBObjectMapper存储双倍

Question

在dynamo db中管理double类型的值的正确方法是什么？我可以使用[dynamoDBObjectMapper save:]向数据库中成功添加一个double，但是当我尝试使用[dynamoDBObjectMapper query:[DynamoTransaction class] expression:queryExpression]获得它时，它给了我以下异常:

NSInvalidArgumentExeption
setObjectForKey: object cannot be nil (key: amount)

我从数据库获取对象的代码如下:

-(void)loadTransactionsFromDatabase:(NSString*)userID successBlock:(void(^)(NSArray*))successBlock{
[self connectToInternetWithsuccessBlock:^{

    AWSDynamoDBObjectMapper *dynamoDBObjectMapper = [AWSDynamoDBObjectMapper defaultDynamoDBObjectMapper];
    AWSDynamoDBQueryExpression *queryExpression = [AWSDynamoDBQueryExpression new];
    queryExpression.hashKeyValues = userID;
    queryExpression.scanIndexForward = @YES;

    [[[dynamoDBObjectMapper query:[DynamoTransaction class] expression:queryExpression]continueWithExecutor:[BFExecutor mainThreadExecutor] withSuccessBlock:^id(BFTask*task){

        NSMutableArray*transactionsArray = [[NSMutableArray alloc]init];
        AWSDynamoDBPaginatedOutput*paginatedOutput = task.result;
        for(DynamoTransaction*databaseTransaction in paginatedOutput.items){
            Transaction*transaction = [[Transaction alloc]initWithDynamoTransaction:databaseTransaction];
            [transactionsArray addObject:transaction];
        }

        if(successBlock!=nil){successBlock(transactionsArray);}
        NSLog(@"loaded all my transactions from database");
        return nil;

    }]continueWithBlock:^id(BFTask*task){
        NSLog(@"Failed");
        return nil;
    }];
} andFailBlock:^{
    NSLog(@"loadTransactions Problem");
}];
}

当我在数据库中有一个非十进制数字时，它始终有效

我该怎么办？
非常感谢你

Answer 1

就我而言，我解决了更新我的Pod的问题(AWSiOSSDKv2 2.0.17(原为2.0.13))。

请参阅:AWS IOS SDK DynamoDB Scan - MainThread works in emulador, but don't in device debugger