DynamoDB get_item "The provided key element does not match the schema"

Question

我正在尝试使用 https://github.com/aws/aws-sdk-ruby/blob/0465bfacbf87e6bc78c38191961ed860413d85cd/gems/aws-sdk-dynamodb/lib/aws-sdk-dynamodb/table.rb#L697 via our Ruby on Rails app, dr-recommends 实现 DynamoDB get_item 调用。

通过查看我编写的这个 DynamoDB CloudFormation 堆栈，我希望下面的 get_item 调用能够正常工作，所以我对如何继续有点迷茫。

Type: 'AWS::DynamoDB::Table'
Properties:
  AttributeDefinitions:
    - AttributeName: 'pk'
      AttributeType: 'S'
    - AttributeName: 'sk'
      AttributeType: 'S'
  KeySchema:
    - KeyType: 'HASH'
      AttributeName: 'pk'
    - KeyType: 'RANGE'
      AttributeName: 'sk'
  BillingMode: 'PAY_PER_REQUEST'

您在这里看到任何可以解释为什么以下调用可能不起作用的内容吗？

aws dynamodb get-item --table-name actual-table-name --key "{\"pk\":{\"S\":\"77119f89-d5bc-4662-91bb-f3e81e1d9b21\"}}" --projection-expression sk
# An error occurred (ValidationException) when calling the GetItem operation: The provided key element does not match the schema

Answer 1

GetItem() 要求您使用主键。

您需要指定散列（又名分区）和排序键。

DynamoDB get_item "The provided key element does not match the schema"

DynamoDB get_item "The provided key element does not match the schema"

amazon-cloudformation

amazon-dynamodb

aws-cli