AWS DynamoDbException：提供的键元素与架构不匹配

如何解决AWS DynamoDbException：提供的键元素与架构不匹配

我通过遵循两个字段java sdk v2 guide创建了一个DynamoDB表；

PartitionKey -> Resource (String)
Field1 -> Role (String)

因此没有任何排序键。我有一个非常简单的POJO，看起来像;

import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbBean;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbPartitionKey;

@DynamoDbBean
public class RoleItem {
    private String resource;
    private String role;

    @DynamoDbPartitionKey
    public String getResource() {
        return this.resource;
    };

    public void setResource(String resource) {
        this.resource = resource;
    }

    public String getRole() {
        return this.role;
    }

    public void setRole(String role) {
        this.role = role;
    }
}

这就是我测试getItem的方式；

public class App {
    public static void main(String[] args) {
        DynamoDbEnhancedClient enhancedClient = DynamoDbEnhancedClient.create();
        DynamoDbTable<RoleItem> userRoles = enhancedClient.table("UserRoles",TableSchema.fromBean(RoleItem.class));
        Key key = Key.builder().partitionValue("FINANCE").build();
        GetItemEnhancedRequest getItemEnhancedRequest = GetItemEnhancedRequest.builder().key(key).build();
        RoleItem item = userRoles.getItem(getItemEnhancedRequest);
    }
}

最后我得到了

Exception in thread "main" software.amazon.awssdk.services.dynamodb.model.DynamoDbException: The provided key element does not match the schema (Service: DynamoDb,Status Code: 400,Request ID: 4L424LI9BT2H2S5E9L2H0SJLE3VV4KQNSO5AEMVJF66Q9ASUAAJG,Extended Request ID: null)

我找不到我的示例出了什么问题。感谢您的帮助。谢谢！

注意：以防万一我可以通过使用具有相同架构的DynamoDBMapper但使用aws sdk v1注释来实现相同的操作。所以我的实体类看起来像;

import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBAttribute;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBHashKey;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTable;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@DynamoDBTable(tableName = "UserRoles")
@Builder
@Data
@AllArgsConstructor
@NoArgsConstructor
public class RoleItem {

    @DynamoDBHashKey(attributeName = "Resource")
    private String resource;

    @DynamoDBAttribute(attributeName = "Role")
    private String role;
}

这是我执行getItem操作的方式；

public class App {
    public static void main(String[] args) {
        AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().withRegion(Regions.EU_CENTRAL_1).build();
        DynamoDBMapper mapper = new DynamoDBMapper(client);
        DynamoDBQueryExpression<RoleItem> queryExpression = new DynamoDBQueryExpression<RoleItem>().withHashKeyValues(RoleItem.builder().resource("FINANCE").build());
        PaginatedQueryList<RoleItem> roleItems = mapper.query(RoleItem.class,queryExpression);
        RoleItem roleItem = roleItems.stream().findFirst().get();
    }
}