Aws-sdk-js: Typescript definition for AttributeValue for DynamoDb leads to query failures

[schatekar]

I have a DynamoDb table named User which has a key schema like the below

    UserTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: "Users"
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH

I am using the following typescript code to query from this table

let params: QueryInput = {
      TableName: "Users",
      KeyConditionExpression: "#id = :id",
      ExpressionAttributeNames: {
        "#id": "id"
      },
      ExpressionAttributeValues: {
        ":id": {
              S: "1"
           }
      }
    }

    let result = await ddbClient.query(params).promise();

This is resulting in the following error

ValidationException: One or more parameter values were invalid: Condition parameter type does not match schema type

I have read on the internet that you do not need to specify the types in ExpressionAttributeValue. However, due to the published definition of AttributeValue interface, I cannot do away without specifying the type. What I am doing, for now, is declaring the params variable to be of type any and get rid of type specified in the ExpressionAttributeValue like the below

let params: any = {
      TableName: "Users",
      KeyConditionExpression: "#id = :id",
      ExpressionAttributeNames: {
        "#id": "id"
      },
      ExpressionAttributeValues: {
        ":id": "1"
      }
    }

    let result = await ddbClient.query(params).promise();

This works. Is this a bug? Or am I doing something wrong?

[chrisradek]

@schatekar
Are you referencing the QueryInput interface from AWS.DynamoDB.DocumentClient.QueryInput or AWS.DynamoDB.QueryInput? Since the DocumentClient automatically handles transforming values into AttributeValues, its interfaces are different. In your case, you should be using the QueryInput from the DocumentClient.

[schatekar]

@chrisradek That worked like a charm. Thanks.

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