根据此处的文档，我应该能够将具有我的非键属性之一的项目作为空字符串。
我主要使用 Kotlin，但也使用 Java 进行了测试，但我无法编写空字符串。我看到以下错误：
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
我正在使用最新版本的 SDK，版本 2.13.55
这是Java中的一些示例代码：
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();
}
}