迪纳莫德"GetItem operation: Requested resource not found" / "The provided key element does not match the

Question

我不知道如何解释这一点：

$aws dynamodb scan --table-name Todos-dev  
...
{
"Items": [
{
"todoId": {
"S": "9e6e7f0f-97ee-4289-93b9-cb1bf46d5190"
},
"createdAt": {
"S": "2019-12-29T07:11:09.581Z"
},
"name": {
"S": "test4"
},
"userId": {

和

$ aws dynamodb get-item --table-name Todos.dev --key file://key.json
An error occurred (ResourceNotFoundException) when calling the GetItem operation: Requested resource not found

哪里

$ cat key.json 
{"todoId": {"S": "9e6e7f0f-97ee-4289-93b9-cb1bf46d5190"}}

serverless.yml

TodosTable:
Type: AWS::DynamoDB::Table
Properties:
AttributeDefinitions:
- AttributeName: todoId
AttributeType: S
- AttributeName: createdAt
AttributeType: S
- AttributeName: dueDate
AttributeType: S
KeySchema:
- AttributeName: todoId
KeyType: HASH
- AttributeName: createdAt
KeyType: RANGE
BillingMode: PAY_PER_REQUEST
TableName: ${self:provider.environment.TODOS_TABLE}
LocalSecondaryIndexes:
- IndexName: ${self:provider.environment.INDEX_NAME}
KeySchema:
- AttributeName: todoId
KeyType: HASH
- AttributeName: dueDate
KeyType: RANGE
Projection:
ProjectionType: ALL

我收到的消息"提供的键元素与架构不匹配"，来自docClient.delete，尝试了多种组合来指定键，没有任何效果。

Answer 1

键元素与架构不匹配

您的表具有哈希键和范围键。您的key.json文件只有哈希键。使用getItem时，必须提供完整(哈希和范围(密钥。如果要获取同一哈希键的多个值，或者范围键值未知，则只能使用哈希键，但必须queryapi 使用它们。

未找到资源

您在扫描调用中使用Todos-dev，但在 getItem 调用中使用Todos.dev。