DynamoDB：將 putItem 與空字符串一起使用失敗

Question

根據此處的文檔，我應該能夠將具有我的非鍵屬性之一的項目作為空字符串。

我主要使用的是 Kotlin，但也在 Java 中進行了測試，但我無法編寫空字符串。 我看到以下錯誤：

Exception in thread "main" java.util.concurrent.ExecutionException: software.amazon.awssdk.services.dynamodb.model.DynamoDbException: One or more parameter values were invalid: An AttributeValue may not contain an empty string (Service: DynamoDb, Status Code: 400, Request ID: 741fa685-4c6b-40d3-9c48-edaeeb5ca513, Extended Request ID: null)
    at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395)
    at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2070)
    at dynamo.DynamoClient.putData(DynamoClient.kt:64)
    at dynamo.DynamoClientKt.main(DynamoClient.kt:317)
    at dynamo.DynamoClientKt$$$main.invoke(Unknown Source)
    at kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt$createCoroutineUnintercepted$$inlined$createCoroutineFromSuspendFunction$IntrinsicsKt__IntrinsicsJvmKt$1.invokeSuspend(IntrinsicsJvm.kt:199)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlin.coroutines.ContinuationKt.startCoroutine(Continuation.kt:114)
    at kotlin.coroutines.jvm.internal.RunSuspendKt.runSuspend(RunSuspend.kt:19)
    at dynamo.DynamoClientKt.main(DynamoClient.kt)
Caused by: software.amazon.awssdk.services.dynamodb.model.DynamoDbException: One or more parameter values were invalid: An AttributeValue may not contain an empty string (Service: DynamoDb, Status Code: 400, Request ID: 741fa685-4c6b-40d3-9c48-edaeeb5ca513, Extended Request ID: null)
    at software.amazon.awssdk.services.dynamodb.model.DynamoDbException$BuilderImpl.build(DynamoDbException.java:95)
    at software.amazon.awssdk.services.dynamodb.model.DynamoDbException$BuilderImpl.build(DynamoDbException.java:55)
    at software.amazon.awssdk.protocols.json.internal.unmarshall.AwsJsonProtocolErrorUnmarshaller.unmarshall(AwsJsonProtocolErrorUnmarshaller.java:89)
    at software.amazon.awssdk.protocols.json.internal.unmarshall.AwsJsonProtocolErrorUnmarshaller.handle(AwsJsonProtocolErrorUnmarshaller.java:63)
    at software.amazon.awssdk.protocols.json.internal.unmarshall.AwsJsonProtocolErrorUnmarshaller.handle(AwsJsonProtocolErrorUnmarshaller.java:42)
    at software.amazon.awssdk.core.http.MetricCollectingHttpResponseHandler.lambda$handle$0(MetricCollectingHttpResponseHandler.java:52)
    at software.amazon.awssdk.core.internal.util.MetricUtils.measureDurationUnsafe(MetricUtils.java:64)
    at software.amazon.awssdk.core.http.MetricCollectingHttpResponseHandler.handle(MetricCollectingHttpResponseHandler.java:52)
    at software.amazon.awssdk.core.internal.http.async.AsyncResponseHandler.lambda$prepare$0(AsyncResponseHandler.java:88)
    at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
    at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
    at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2144)
    at software.amazon.awssdk.core.internal.http.async.AsyncResponseHandler$BaosSubscriber.onComplete(AsyncResponseHandler.java:129)
    at software.amazon.awssdk.http.nio.netty.internal.ResponseHandler.runAndLogError(ResponseHandler.java:179)
    at software.amazon.awssdk.http.nio.netty.internal.ResponseHandler.access$500(ResponseHandler.java:69)
    at software.amazon.awssdk.http.nio.netty.internal.ResponseHandler$PublisherAdapter$1.onComplete(ResponseHandler.java:295)
    at software.amazon.awssdk.http.nio.netty.internal.nrs.HandlerPublisher.publishMessage(HandlerPublisher.java:402)
    at software.amazon.awssdk.http.nio.netty.internal.nrs.HandlerPublisher.flushBuffer(HandlerPublisher.java:338)
    at software.amazon.awssdk.http.nio.netty.internal.nrs.HandlerPublisher.receivedDemand(HandlerPublisher.java:291)
    at software.amazon.awssdk.http.nio.netty.internal.nrs.HandlerPublisher.access$200(HandlerPublisher.java:61)
    at software.amazon.awssdk.http.nio.netty.internal.nrs.HandlerPublisher$ChannelSubscription$1.run(HandlerPublisher.java:495)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:497)
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at java.base/java.lang.Thread.run(Thread.java:835)

Process finished with exit code 1

我使用的是最新版本的 SDK，版本 2.13.55

以下是 Java 中的一些示例代碼：

import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.dynamodb.DynamoDbAsyncClient;
import software.amazon.awssdk.services.dynamodb.model.AttributeValue;
import software.amazon.awssdk.services.dynamodb.model.PutItemRequest;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;

public class DynamoTest {
    public void test() throws MalformedURLException, URISyntaxException, ExecutionException, InterruptedException {
        String host = "http://localhost:2223";
        URI uriHost = new URL(host).toURI();

        DynamoDbAsyncClient client = DynamoDbAsyncClient
                .builder()
                .endpointOverride(uriHost)
                .credentialsProvider(
                        DefaultCredentialsProvider.create()
                )
                .region(Region.US_EAST_1)
                .build();

        Map<String, AttributeValue> mapValues = new HashMap<>();
        mapValues.put("pk", AttributeValue.builder().s("FAKE_PK").build());
        mapValues.put("sk", AttributeValue.builder().s("1").build());
        mapValues.put("failingEmptyStr", AttributeValue.builder().s("").build());

        PutItemRequest putItem = PutItemRequest
                .builder()
                .item(mapValues)
                .tableName("test-table")
                .build();

        client.putItem(putItem).get();
    }

    public static void main(String[] args) throws MalformedURLException, URISyntaxException, ExecutionException, InterruptedException {
        new DynamoTest().test();
    }
}

Answer 1

看起來您正在使用 DynamoDB Local。 將版本更新為最新版本，因為它確實支持空字符串。 它與 DynamoDB 中的特性同時發布。