DynamoDB query by Global Secondary Index issue

[blackhurstjoshua]

I know I'm missing something... but I'm trying to query my table using a Global Secondary Index.

Inside my function I have this:

keyEx := expression.Key("TailNum").Equal(expression.Value(tailNum))
expr, err := expression.NewBuilder().WithKeyCondition(keyEx).Build()
if err != nil {
	return nil, err
}

queryPaginator := dynamodb.NewQueryPaginator(db.dyndb, &dynamodb.QueryInput{
	TableName:                 &db.table,
	ExpressionAttributeNames:  expr.Names(),
	ExpressionAttributeValues: expr.Values(),
	KeyConditionExpression:    expr.KeyCondition(),
})

for queryPaginator.HasMorePages() {
	res, err := queryPaginator.NextPage(context.TODO())
	if err != nil {
		fmt.Println("Error getting next page", err)
		return nil, err
	}

	var flightBatch []Flight
	err = attributevalue.UnmarshalListOfMaps(res.Items, &flightBatch)
	if err != nil {
		fmt.Println("Error unmarshalling flight batch", err)
		return nil, err
	}

	flights = append(flights, flightBatch...)
}

Error message:

api error ValidationException: Query condition missed key schema element: Id

It's looking for the primary partition key. But I don't want to provide it for the type of query I want to perform.

I'm trying to query a table that I have set up with flight data. The Partition Key for the table is an ID field. I have TailNum set as a Global Secondary Index on the table.

When I use the console:

I get good results :)

Let me know if I've encountered a bug or if I'm making a mistake (more likely).