AWS SDK 또는 CLI와 함께 BatchGetItem
사용
다음 코드 예제는 BatchGetItem
의 사용 방법을 보여 줍니다.
- .NET
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- AWS SDK for .NET
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참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. using System; using System.Collections.Generic; using Amazon.DynamoDBv2; using Amazon.DynamoDBv2.Model; namespace LowLevelBatchGet { public class LowLevelBatchGet { private static readonly string _table1Name = "Forum"; private static readonly string _table2Name = "Thread"; public static async void RetrieveMultipleItemsBatchGet(AmazonDynamoDBClient client) { var request = new BatchGetItemRequest { RequestItems = new Dictionary<string, KeysAndAttributes>() { { _table1Name, new KeysAndAttributes { Keys = new List<Dictionary<string, AttributeValue> >() { new Dictionary<string, AttributeValue>() { { "Name", new AttributeValue { S = "Amazon DynamoDB" } } }, new Dictionary<string, AttributeValue>() { { "Name", new AttributeValue { S = "Amazon S3" } } } } }}, { _table2Name, new KeysAndAttributes { Keys = new List<Dictionary<string, AttributeValue> >() { new Dictionary<string, AttributeValue>() { { "ForumName", new AttributeValue { S = "Amazon DynamoDB" } }, { "Subject", new AttributeValue { S = "DynamoDB Thread 1" } } }, new Dictionary<string, AttributeValue>() { { "ForumName", new AttributeValue { S = "Amazon DynamoDB" } }, { "Subject", new AttributeValue { S = "DynamoDB Thread 2" } } }, new Dictionary<string, AttributeValue>() { { "ForumName", new AttributeValue { S = "Amazon S3" } }, { "Subject", new AttributeValue { S = "S3 Thread 1" } } } } } } } }; BatchGetItemResponse response; do { Console.WriteLine("Making request"); response = await client.BatchGetItemAsync(request); // Check the response. var responses = response.Responses; // Attribute list in the response. foreach (var tableResponse in responses) { var tableResults = tableResponse.Value; Console.WriteLine("Items retrieved from table {0}", tableResponse.Key); foreach (var item1 in tableResults) { PrintItem(item1); } } // Any unprocessed keys? could happen if you exceed ProvisionedThroughput or some other error. Dictionary<string, KeysAndAttributes> unprocessedKeys = response.UnprocessedKeys; foreach (var unprocessedTableKeys in unprocessedKeys) { // Print table name. Console.WriteLine(unprocessedTableKeys.Key); // Print unprocessed primary keys. foreach (var key in unprocessedTableKeys.Value.Keys) { PrintItem(key); } } request.RequestItems = unprocessedKeys; } while (response.UnprocessedKeys.Count > 0); } private static void PrintItem(Dictionary<string, AttributeValue> attributeList) { foreach (KeyValuePair<string, AttributeValue> kvp in attributeList) { string attributeName = kvp.Key; AttributeValue value = kvp.Value; Console.WriteLine( attributeName + " " + (value.S == null ? "" : "S=[" + value.S + "]") + (value.N == null ? "" : "N=[" + value.N + "]") + (value.SS == null ? "" : "SS=[" + string.Join(",", value.SS.ToArray()) + "]") + (value.NS == null ? "" : "NS=[" + string.Join(",", value.NS.ToArray()) + "]") ); } Console.WriteLine("************************************************"); } static void Main() { var client = new AmazonDynamoDBClient(); RetrieveMultipleItemsBatchGet(client); } } }
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API 세부 정보는 AWS SDK for .NET API 참조의 BatchGetItem을 참조하십시오.
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- Bash
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- Bash 스크립트와 함께 AWS CLI사용
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참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. ############################################################################# # function dynamodb_batch_get_item # # This function gets a batch of items from a DynamoDB table. # # Parameters: # -i item -- Path to json file containing the keys of the items to get. # # Returns: # The items as json output. # And: # 0 - If successful. # 1 - If it fails. ########################################################################## function dynamodb_batch_get_item() { local item response local option OPTARG # Required to use getopts command in a function. ####################################### # Function usage explanation ####################################### function usage() { echo "function dynamodb_batch_get_item" echo "Get a batch of items from a DynamoDB table." echo " -i item -- Path to json file containing the keys of the items to get." echo "" } while getopts "i:h" option; do case "${option}" in i) item="${OPTARG}" ;; h) usage return 0 ;; \?) echo "Invalid parameter" usage return 1 ;; esac done export OPTIND=1 if [[ -z "$item" ]]; then errecho "ERROR: You must provide an item with the -i parameter." usage return 1 fi response=$(aws dynamodb batch-get-item \ --request-items file://"$item") local error_code=${?} if [[ $error_code -ne 0 ]]; then aws_cli_error_log $error_code errecho "ERROR: AWS reports batch-get-item operation failed.$response" return 1 fi echo "$response" return 0 }
이 예제에 사용된 유틸리티 함수
############################################################################### # function errecho # # This function outputs everything sent to it to STDERR (standard error output). ############################################################################### function errecho() { printf "%s\n" "$*" 1>&2 } ############################################################################## # function aws_cli_error_log() # # This function is used to log the error messages from the AWS CLI. # # See https://docs.aws.amazon.com/cli/latest/topic/return-codes.html#cli-aws-help-return-codes. # # The function expects the following argument: # $1 - The error code returned by the AWS CLI. # # Returns: # 0: - Success. # ############################################################################## function aws_cli_error_log() { local err_code=$1 errecho "Error code : $err_code" if [ "$err_code" == 1 ]; then errecho " One or more S3 transfers failed." elif [ "$err_code" == 2 ]; then errecho " Command line failed to parse." elif [ "$err_code" == 130 ]; then errecho " Process received SIGINT." elif [ "$err_code" == 252 ]; then errecho " Command syntax invalid." elif [ "$err_code" == 253 ]; then errecho " The system environment or configuration was invalid." elif [ "$err_code" == 254 ]; then errecho " The service returned an error." elif [ "$err_code" == 255 ]; then errecho " 255 is a catch-all error." fi return 0 }
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API 세부 정보는 AWS CLI 명령 참조의 BatchGetItem을 참조하십시오.
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- C++
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- SDK for C++
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참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. //! Batch get items from different Amazon DynamoDB tables. /*! \sa batchGetItem() \param clientConfiguration: AWS client configuration. \return bool: Function succeeded. */ bool AwsDoc::DynamoDB::batchGetItem( const Aws::Client::ClientConfiguration &clientConfiguration) { Aws::DynamoDB::DynamoDBClient dynamoClient(clientConfiguration); Aws::DynamoDB::Model::BatchGetItemRequest request; // Table1: Forum. Aws::String table1Name = "Forum"; Aws::DynamoDB::Model::KeysAndAttributes table1KeysAndAttributes; // Table1: Projection expression. table1KeysAndAttributes.SetProjectionExpression("#n, Category, Messages, #v"); // Table1: Expression attribute names. Aws::Http::HeaderValueCollection headerValueCollection; headerValueCollection.emplace("#n", "Name"); headerValueCollection.emplace("#v", "Views"); table1KeysAndAttributes.SetExpressionAttributeNames(headerValueCollection); // Table1: Set key name, type, and value to search. std::vector<Aws::String> nameValues = {"Amazon DynamoDB", "Amazon S3"}; for (const Aws::String &name: nameValues) { Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> keys; Aws::DynamoDB::Model::AttributeValue key; key.SetS(name); keys.emplace("Name", key); table1KeysAndAttributes.AddKeys(keys); } Aws::Map<Aws::String, Aws::DynamoDB::Model::KeysAndAttributes> requestItems; requestItems.emplace(table1Name, table1KeysAndAttributes); // Table2: ProductCatalog. Aws::String table2Name = "ProductCatalog"; Aws::DynamoDB::Model::KeysAndAttributes table2KeysAndAttributes; table2KeysAndAttributes.SetProjectionExpression("Title, Price, Color"); // Table2: Set key name, type, and value to search. std::vector<Aws::String> idValues = {"102", "103", "201"}; for (const Aws::String &id: idValues) { Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> keys; Aws::DynamoDB::Model::AttributeValue key; key.SetN(id); keys.emplace("Id", key); table2KeysAndAttributes.AddKeys(keys); } requestItems.emplace(table2Name, table2KeysAndAttributes); bool result = true; do { // Use a do loop to handle pagination. request.SetRequestItems(requestItems); const Aws::DynamoDB::Model::BatchGetItemOutcome &outcome = dynamoClient.BatchGetItem( request); if (outcome.IsSuccess()) { for (const auto &responsesMapEntry: outcome.GetResult().GetResponses()) { Aws::String tableName = responsesMapEntry.first; const Aws::Vector<Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue>> &tableResults = responsesMapEntry.second; std::cout << "Retrieved " << tableResults.size() << " responses for table '" << tableName << "'.\n" << std::endl; if (tableName == "Forum") { std::cout << "Name | Category | Message | Views" << std::endl; for (const Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> &item: tableResults) { std::cout << item.at("Name").GetS() << " | "; std::cout << item.at("Category").GetS() << " | "; std::cout << (item.count("Message") == 0 ? "" : item.at( "Messages").GetN()) << " | "; std::cout << (item.count("Views") == 0 ? "" : item.at( "Views").GetN()) << std::endl; } } else { std::cout << "Title | Price | Color" << std::endl; for (const Aws::Map<Aws::String, Aws::DynamoDB::Model::AttributeValue> &item: tableResults) { std::cout << item.at("Title").GetS() << " | "; std::cout << (item.count("Price") == 0 ? "" : item.at( "Price").GetN()); if (item.count("Color")) { std::cout << " | "; for (const std::shared_ptr<Aws::DynamoDB::Model::AttributeValue> &listItem: item.at( "Color").GetL()) std::cout << listItem->GetS() << " "; } std::cout << std::endl; } } std::cout << std::endl; } // If necessary, repeat request for remaining items. requestItems = outcome.GetResult().GetUnprocessedKeys(); } else { std::cerr << "Batch get item failed: " << outcome.GetError().GetMessage() << std::endl; result = false; break; } } while (!requestItems.empty()); return result; }
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API 세부 정보는 AWS SDK for C++ API 참조의 BatchGetItem을 참조하십시오.
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- CLI
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- AWS CLI
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테이블에서 여러 항목을 검색하는 방법
다음
batch-get-items
예시에서는GetItem
요청 3개의 배치를 사용하여MusicCollection
테이블에서 여러 항목을 읽고 작업에 사용된 읽기 용량 단위 수를 요청합니다. 이 명령은AlbumTitle
속성만 반환합니다.aws dynamodb batch-get-item \ --request-items
file://request-items.json
\ --return-consumed-capacityTOTAL
request-items.json
의 콘텐츠:{ "MusicCollection": { "Keys": [ { "Artist": {"S": "No One You Know"}, "SongTitle": {"S": "Call Me Today"} }, { "Artist": {"S": "Acme Band"}, "SongTitle": {"S": "Happy Day"} }, { "Artist": {"S": "No One You Know"}, "SongTitle": {"S": "Scared of My Shadow"} } ], "ProjectionExpression":"AlbumTitle" } }
출력:
{ "Responses": { "MusicCollection": [ { "AlbumTitle": { "S": "Somewhat Famous" } }, { "AlbumTitle": { "S": "Blue Sky Blues" } }, { "AlbumTitle": { "S": "Louder Than Ever" } } ] }, "UnprocessedKeys": {}, "ConsumedCapacity": [ { "TableName": "MusicCollection", "CapacityUnits": 1.5 } ] }
자세한 내용은 Amazon DynamoDB 개발자 안내서의 배치 작업을 참조하세요.
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API 세부 정보는 AWS CLI 명령 참조의 BatchGetItem
을 참조하십시오.
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- Java
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- SDK for Java 2.x
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참고
GitHub에 더 많은 내용이 있습니다. AWS코드 예시 리포지토리
에서 전체 예시를 찾고 설정 및 실행하는 방법을 배워보세요. 서비스 클라이언트를 사용하여 배치 항목을 가져오는 방법을 보여줍니다.
import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.AttributeValue; import software.amazon.awssdk.services.dynamodb.model.BatchGetItemRequest; import software.amazon.awssdk.services.dynamodb.model.BatchGetItemResponse; import software.amazon.awssdk.services.dynamodb.model.KeysAndAttributes; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Before running this Java V2 code example, set up your development environment, including your credentials. * * For more information, see the following documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class BatchReadItems { public static void main(String[] args){ final String usage = """ Usage: <tableName> Where: tableName - The Amazon DynamoDB table (for example, Music).\s """; String tableName = "Music"; Region region = Region.US_EAST_1; DynamoDbClient dynamoDbClient = DynamoDbClient.builder() .region(region) .build(); getBatchItems(dynamoDbClient, tableName); } public static void getBatchItems(DynamoDbClient dynamoDbClient, String tableName) { // Define the primary key values for the items you want to retrieve. Map<String, AttributeValue> key1 = new HashMap<>(); key1.put("Artist", AttributeValue.builder().s("Artist1").build()); Map<String, AttributeValue> key2 = new HashMap<>(); key2.put("Artist", AttributeValue.builder().s("Artist2").build()); // Construct the batchGetItem request. Map<String, KeysAndAttributes> requestItems = new HashMap<>(); requestItems.put(tableName, KeysAndAttributes.builder() .keys(List.of(key1, key2)) .projectionExpression("Artist, SongTitle") .build()); BatchGetItemRequest batchGetItemRequest = BatchGetItemRequest.builder() .requestItems(requestItems) .build(); // Make the batchGetItem request. BatchGetItemResponse batchGetItemResponse = dynamoDbClient.batchGetItem(batchGetItemRequest); // Extract and print the retrieved items. Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResponse.responses(); if (responses.containsKey(tableName)) { List<Map<String, AttributeValue>> musicItems = responses.get(tableName); for (Map<String, AttributeValue> item : musicItems) { System.out.println("Artist: " + item.get("Artist").s() + ", SongTitle: " + item.get("SongTitle").s()); } } else { System.out.println("No items retrieved."); } } }
서비스 클라이언트와 페이지네이터를 사용하여 배치 항목을 가져오는 방법을 보여줍니다.
import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.AttributeValue; import software.amazon.awssdk.services.dynamodb.model.BatchGetItemRequest; import software.amazon.awssdk.services.dynamodb.model.KeysAndAttributes; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; public class BatchGetItemsPaginator { public static void main(String[] args){ final String usage = """ Usage: <tableName> Where: tableName - The Amazon DynamoDB table (for example, Music).\s """; String tableName = "Music"; Region region = Region.US_EAST_1; DynamoDbClient dynamoDbClient = DynamoDbClient.builder() .region(region) .build(); getBatchItemsPaginator(dynamoDbClient, tableName) ; } public static void getBatchItemsPaginator(DynamoDbClient dynamoDbClient, String tableName) { // Define the primary key values for the items you want to retrieve. Map<String, AttributeValue> key1 = new HashMap<>(); key1.put("Artist", AttributeValue.builder().s("Artist1").build()); Map<String, AttributeValue> key2 = new HashMap<>(); key2.put("Artist", AttributeValue.builder().s("Artist2").build()); // Construct the batchGetItem request. Map<String, KeysAndAttributes> requestItems = new HashMap<>(); requestItems.put(tableName, KeysAndAttributes.builder() .keys(List.of(key1, key2)) .projectionExpression("Artist, SongTitle") .build()); BatchGetItemRequest batchGetItemRequest = BatchGetItemRequest.builder() .requestItems(requestItems) .build(); // Use batchGetItemPaginator for paginated requests. dynamoDbClient.batchGetItemPaginator(batchGetItemRequest).stream() .flatMap(response -> response.responses().getOrDefault(tableName, Collections.emptyList()).stream()) .forEach(item -> { System.out.println("Artist: " + item.get("Artist").s() + ", SongTitle: " + item.get("SongTitle").s()); }); } }
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API 세부 정보는 AWS SDK for Java 2.x API 참조의 BatchGetItem을 참조하십시오.
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- JavaScript
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- SDK for JavaScript (v3)
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참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. 이 예제에서는 문서 클라이언트를 사용하여 DynamoDB의 항목 작업을 단순화합니다. API에 대한 세부 정보는 BatchGet을 참조하십시오.
import { DynamoDBClient } from "@aws-sdk/client-dynamodb"; import { BatchGetCommand, DynamoDBDocumentClient } from "@aws-sdk/lib-dynamodb"; const client = new DynamoDBClient({}); const docClient = DynamoDBDocumentClient.from(client); export const main = async () => { const command = new BatchGetCommand({ // Each key in this object is the name of a table. This example refers // to a Books table. RequestItems: { Books: { // Each entry in Keys is an object that specifies a primary key. Keys: [ { Title: "How to AWS", }, { Title: "DynamoDB for DBAs", }, ], // Only return the "Title" and "PageCount" attributes. ProjectionExpression: "Title, PageCount", }, }, }); const response = await docClient.send(command); console.log(response.Responses["Books"]); return response; };
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자세한 정보는 AWS SDK for JavaScript 개발자 안내서를 참조하십시오.
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API 세부 정보는 AWS SDK for JavaScript API 참조의 BatchGetItem을 참조하십시오.
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- SDK for JavaScript (v2)
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참고
GitHub에 더 많은 내용이 있습니다. AWS코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. // Load the AWS SDK for Node.js var AWS = require("aws-sdk"); // Set the region AWS.config.update({ region: "REGION" }); // Create DynamoDB service object var ddb = new AWS.DynamoDB({ apiVersion: "2012-08-10" }); var params = { RequestItems: { TABLE_NAME: { Keys: [ { KEY_NAME: { N: "KEY_VALUE_1" } }, { KEY_NAME: { N: "KEY_VALUE_2" } }, { KEY_NAME: { N: "KEY_VALUE_3" } }, ], ProjectionExpression: "KEY_NAME, ATTRIBUTE", }, }, }; ddb.batchGetItem(params, function (err, data) { if (err) { console.log("Error", err); } else { data.Responses.TABLE_NAME.forEach(function (element, index, array) { console.log(element); }); } });
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자세한 정보는 AWS SDK for JavaScript 개발자 안내서를 참조하십시오.
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API 세부 정보는 AWS SDK for JavaScript API 참조의 BatchGetItem을 참조하십시오.
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- PowerShell
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- PowerShell용 도구
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예 1: DynamoDB 테이블 'Music' 및 'Songs'에서 노래 제목이 'Somewhere Down The Road'인 항목을 가져옵니다.
$key = @{ SongTitle = 'Somewhere Down The Road' Artist = 'No One You Know' } | ConvertTo-DDBItem $keysAndAttributes = New-Object Amazon.DynamoDBv2.Model.KeysAndAttributes $list = New-Object 'System.Collections.Generic.List[System.Collections.Generic.Dictionary[String, Amazon.DynamoDBv2.Model.AttributeValue]]' $list.Add($key) $keysAndAttributes.Keys = $list $requestItem = @{ 'Music' = [Amazon.DynamoDBv2.Model.KeysAndAttributes]$keysAndAttributes 'Songs' = [Amazon.DynamoDBv2.Model.KeysAndAttributes]$keysAndAttributes } $batchItems = Get-DDBBatchItem -RequestItem $requestItem $batchItems.GetEnumerator() | ForEach-Object {$PSItem.Value} | ConvertFrom-DDBItem
출력:
Name Value ---- ----- Artist No One You Know SongTitle Somewhere Down The Road AlbumTitle Somewhat Famous CriticRating 10 Genre Country Price 1.94 Artist No One You Know SongTitle Somewhere Down The Road AlbumTitle Somewhat Famous CriticRating 10 Genre Country Price 1.94
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API 세부 정보는 AWS Tools for PowerShell Cmdlet 참조의 BatchGetItem을 참조하세요.
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- Python
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- SDK for Python (Boto3)
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참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. import decimal import json import logging import os import pprint import time import boto3 from botocore.exceptions import ClientError logger = logging.getLogger(__name__) dynamodb = boto3.resource("dynamodb") MAX_GET_SIZE = 100 # Amazon DynamoDB rejects a get batch larger than 100 items. def do_batch_get(batch_keys): """ Gets a batch of items from Amazon DynamoDB. Batches can contain keys from more than one table. When Amazon DynamoDB cannot process all items in a batch, a set of unprocessed keys is returned. This function uses an exponential backoff algorithm to retry getting the unprocessed keys until all are retrieved or the specified number of tries is reached. :param batch_keys: The set of keys to retrieve. A batch can contain at most 100 keys. Otherwise, Amazon DynamoDB returns an error. :return: The dictionary of retrieved items grouped under their respective table names. """ tries = 0 max_tries = 5 sleepy_time = 1 # Start with 1 second of sleep, then exponentially increase. retrieved = {key: [] for key in batch_keys} while tries < max_tries: response = dynamodb.batch_get_item(RequestItems=batch_keys) # Collect any retrieved items and retry unprocessed keys. for key in response.get("Responses", []): retrieved[key] += response["Responses"][key] unprocessed = response["UnprocessedKeys"] if len(unprocessed) > 0: batch_keys = unprocessed unprocessed_count = sum( [len(batch_key["Keys"]) for batch_key in batch_keys.values()] ) logger.info( "%s unprocessed keys returned. Sleep, then retry.", unprocessed_count ) tries += 1 if tries < max_tries: logger.info("Sleeping for %s seconds.", sleepy_time) time.sleep(sleepy_time) sleepy_time = min(sleepy_time * 2, 32) else: break return retrieved
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API 세부 정보는 AWSSDK for Python (Boto3) API 참조의 BatchGetItem를 참조하십시오.
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- Swift
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- SDK for Swift
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참고
이 사전 릴리스 설명서는 평가판 버전 SDK에 관한 것입니다. 내용은 변경될 수 있습니다.
참고
GitHub에 더 많은 내용이 있습니다. AWS 코드 예제 리포지토리
에서 전체 예제를 찾고 설정 및 실행하는 방법을 배워보세요. /// Gets an array of `Movie` objects describing all the movies in the /// specified list. Any movies that aren't found in the list have no /// corresponding entry in the resulting array. /// /// - Parameters /// - keys: An array of tuples, each of which specifies the title and /// release year of a movie to fetch from the table. /// /// - Returns: /// - An array of `Movie` objects describing each match found in the /// table. /// /// - Throws: /// - `MovieError.ClientUninitialized` if the DynamoDB client has not /// been initialized. /// - DynamoDB errors are thrown without change. func batchGet(keys: [(title: String, year: Int)]) async throws -> [Movie] { guard let client = self.ddbClient else { throw MovieError.ClientUninitialized } var movieList: [Movie] = [] var keyItems: [[Swift.String:DynamoDBClientTypes.AttributeValue]] = [] // Convert the list of keys into the form used by DynamoDB. for key in keys { let item: [Swift.String:DynamoDBClientTypes.AttributeValue] = [ "title": .s(key.title), "year": .n(String(key.year)) ] keyItems.append(item) } // Create the input record for `batchGetItem()`. The list of requested // items is in the `requestItems` property. This array contains one // entry for each table from which items are to be fetched. In this // example, there's only one table containing the movie data. // // If we wanted this program to also support searching for matches // in a table of book data, we could add a second `requestItem` // mapping the name of the book table to the list of items we want to // find in it. let input = BatchGetItemInput( requestItems: [ self.tableName: .init( consistentRead: true, keys: keyItems ) ] ) // Fetch the matching movies from the table. let output = try await client.batchGetItem(input: input) // Get the set of responses. If there aren't any, return the empty // movie list. guard let responses = output.responses else { return movieList } // Get the list of matching items for the table with the name // `tableName`. guard let responseList = responses[self.tableName] else { return movieList } // Create `Movie` items for each of the matching movies in the table // and add them to the `MovieList` array. for response in responseList { movieList.append(try Movie(withItem: response)) } return movieList }
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API 세부 정보는 Swift용 AWS SDK API 참조의 BatchGetItem
을 참조하세요.
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AWS SDK 개발자 가이드 및 코드 예시의 전체 목록은 AWS SDK와 함께 DynamoDB 사용 단원을 참조하세요. 이 주제에는 시작하기에 대한 정보와 이전 SDK 버전에 대한 세부 정보도 포함되어 있습니다.