問(wèn)題描述

我可以對(duì) AWS dynamoDB 中的單個(gè)表執(zhí)行簡(jiǎn)單的 Get 請(qǐng)求，但是當(dāng)我將其擴(kuò)展為跨多個(gè)表的批處理請(qǐng)求時(shí)，我繼續(xù)收到錯(cuò)誤

I can perform a simple Get request on a singular table within AWS dynamoDB however when I expand it to a Batch Request across multiple tables I continue to get a error

validation error detected: Value null at 'requestItems.rip.member.keys' failed to satisfy constraint

我理解這是因?yàn)橹禌](méi)有正確傳遞，但我看不出我的代碼有什么問(wèn)題

I understand this as the values not being passed correctly but I can't see what the issue is with my code

//Create Request Values
AWSDynamoDBGetItemInput *getItem = [AWSDynamoDBGetItemInput new];
AWSDynamoDBAttributeValue *hashValue = [AWSDynamoDBAttributeValue new];
hashValue.S = @"User Test";
getItem.key = @{@"ripId": hashValue};

//Create Request Values 2 
AWSDynamoDBGetItemInput *getItem2 = [AWSDynamoDBGetItemInput new];
AWSDynamoDBAttributeValue *hashValue2 = [AWSDynamoDBAttributeValue new];
hashValue2.S = @"User Test";
getItem2.key = @{@"chat": hashValue2};

//Combine to Batch Request
AWSDynamoDBBatchGetItemInput * batchFetch = [AWSDynamoDBBatchGetItemInput new];
batchFetch.requestItems = @{ @"rip": getItem,
                             @"chat": getItem,};

[[dynamoDB batchGetItem:batchFetch] continueWithBlock:^id(BFTask *task) {
    if (!task.error) {

        NSLog(@"BOY SUCCES");

    } else {
        NSLog(@" NO BOY SUCCESS %@",task.error);
    }
    return nil;
}];

在互聯(lián)網(wǎng)上到處搜索，但看不到使用 iOS Objective C(或 swift)的批處理請(qǐng)求的工作示例.

Searched the internet high and low but cannot see a working example of a batch request using iOS Objective C (or swift for that matter).

我在單個(gè) Get 請(qǐng)求中測(cè)試了這兩個(gè)變量，它們都可以工作.

I have tested both variables on a single Get request and they both work.

推薦答案

您忘記在 AWSDynamoDBKeysAndAttributes 中環(huán)繞 AWSDynamoDBAttributeValue.這是一個(gè)來(lái)自 AWSDynamoDBTests.m:

You forgot to wrap around AWSDynamoDBAttributeValue in AWSDynamoDBKeysAndAttributes. Here is a simple example from AWSDynamoDBTests.m:

AWSDynamoDBKeysAndAttributes *keysAndAttributes = [AWSDynamoDBKeysAndAttributes new];
keysAndAttributes.keys = @[@{@"hashKey" : attributeValue1},
                           @{@"hashKey" : attributeValue2}];
keysAndAttributes.consistentRead = @YES;

AWSDynamoDBBatchGetItemInput *batchGetItemInput = [AWSDynamoDBBatchGetItemInput new];
batchGetItemInput.requestItems = @{table1Name: keysAndAttributes};

這篇關(guān)于AWS DynamoDB 批量獲取請(qǐng)求 - iOS的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！