GSI 上的 DynamoDB 查询返回 null 和 nodeJs

Question

I am trying to query dynamo table using global index but it is returning null for some reason. I do have a record that I can query on from console but not working with node js sdk.

heres my code:

try {
    var queryParams = {
      IndexName: "gsi1-index",
      KeyConditionExpression: "gsi1 = :gsi1",
      ExpressionAttributeValues: {
        ":gsi1": userEmail,
      },
      TableName: usersTable,
    };
    await ddb.query(queryParams, (err, userData) => {
      // if (err || userData.Count === 0)
      //   return res.status(400).json({ data: "No information was found" });
      return res.status(200).json(userData);
    });
  } catch (err) {
    return res.status(400).json(err);
  }

I don't know what am i doing wrong exactly? googled everywhere but my code is exactly the same as the others and all the examples

Answer 1

You haven't posted a full code example, but I'll venture a guess. I'm assuming you are running this code in an async lambda using the DDB DocumentClient API.

The problem appears to be that you are using await and callbacks together.

   await ddb.query(queryParams, (err, userData) => {
      return res.status(200).json(userData);
    });

Try this instead

let data = await ddb.query(queryParams).promise();
// do something with data