从Step Function查询DynamoDB时，“Query condition missed key schema element”

Question

【以下的问题经过翻译处理】 我正在尝试在Step Function中查询DynamoDB表，但出现以下错误。

```
Query condition missed key schema element: Scope (Service: DynamoDb, Status Code: 400, Request ID: FN4G...)
```

步骤函数任务定义是；

```
"Obtain user list": {
      "Type": "Task",
      "Parameters": {
        "TableName": "Users",
        "KeyConditionExpression": "#Scope = :Global",
        "ExpressionAttributeNames": {
          "#Scope": {
            "S": "Scope"
          }
        },
        "ExpressionAttributeValues": {
          ":Global": {
            "S": "Global"
          }
        }
      },
      "Resource": "arn:aws:states:::aws-sdk:dynamodb:query",
      "Next": "Pass"
    },
```

DynamoDB定义是；
！[表设置]（/media/postImages/original/IM1D-csEKnQZSOo4v3JU5BKw）

这是来自表中的示例项目；

```
{
  “Scope”：{
    “S”：“Global”
  }，
  “ServiceName”：{
    “S”：“driver”
  }，
  “lastVisitDateTime”：{
    “N”：“1680022106”
  }，
  “Status”：{
    “S”：“ONLINE”
  }
}，
```

有什么指示我缺失了什么吗？谢谢！

Answer

【以下的回答经过翻译处理】 我使用KeyConditions得以使其工作。

```
{
  "Type": "Task",
  "Parameters": {
    "TableName": "Users,
    "KeyConditions": {
      "Scope": {
        "ComparisonOperator": "EQ",
        "AttributeValueList": [
          {
            "S": "Global"
          }
        ]
      }
    }
  },
  "Resource": "arn:aws:states:::aws-sdk:dynamodb:query",
  "Next": "Pass"
}
```

从Step Function查询DynamoDB时，“Query condition missed key schema element”

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