Question

我在＆＃34; DynamoDB的入门指南＆＃34;的步骤5.1中。 http://docs.aws.amazon.com/amazondynamodb/latest/gettingstartedguide/GettingStarted.JsShell.05.html#GettingStarted.JsShell.05.01并被一个非工作示例阻止。

var params = {
  TableName: "Music",
  KeyConditionExpression: "Artist = :artist",
  ExpressionAttributeValues: {
    ":artist": "No One You Know"
  }
};

dynamodb.query(params, function(err, data) {
  if (err)
    console.log(JSON.stringify(err, null, 2));
  else
    console.log(JSON.stringify(data, null, 2));
});

shell接受输入但产生错误

{
  "message": "There were 2 validation errors:\n* MissingRequiredParameter: Missing required key 'KeyConditions' in params\n* UnexpectedParameter: Unexpected key 'KeyConditionExpression' found in params",
  "code": "MultipleValidationErrors",
  "errors": [
    {
      "message": "Missing required key 'KeyConditions' in params",
      "code": "MissingRequiredParameter",
      "time": "2015-10-27T03:08:56.504Z"
    },
    {
      "message": "Unexpected key 'KeyConditionExpression' found in params",
      "code": "UnexpectedParameter",
      "time": "2015-10-27T03:08:56.504Z"
    }
  ],
  "time": "2015-10-27T03:08:56.504Z"
}

我尝试过分析＆＃39; KeyConditions＆＃39; for ExpressionAttributeValues＆＃39;像...

var params = {
  TableName: "Music",
  KeyConditionExpression: "Artist = :artist",
  KeyConditions: {
    ":artist": "No One You Know"
  }
};

dynamodb.query(params, function(err, data) {
  if (err)
    console.log(JSON.stringify(err, null, 2));
  else
    console.log(JSON.stringify(data, null, 2));
});

...但这只会产生空结果{}。当然，音乐＆＃34;音乐＆＃34;与＃34;艺术家＆＃34;属性设置为＆＃34;没有人知道＆＃34;，所以我有点失去了如何继续前进。

查询DDB的正确表达式是什么？＃34; No One You Know＆＃34;在Artist属性？

Answer 1

这是一个陈旧的“dynamodb-local”装置。 brew upgrade dynamodb-local部署了这个孩子的2015-07-16_1.0版本，现在查询有效。

您如何查询DynamoDB

1 个答案: