Filter Expressions not working

[wesley-mixtelematics]

Hi,
Thanks for an awesome bit of code.

I found an issue in the class public static QueryRequest CopyQueryRequest(this QueryRequest queryRequest) in DynamoDBUtil . The variables FilterExpression and ExpressionAttributeValues aren't copied across during the deep copy. I've updated my local copy to the following:

 var copiedRequest = new QueryRequest
            {
                AttributesToGet = queryRequest.AttributesToGet.ToList(), // deep copy
                ConsistentRead = queryRequest.ConsistentRead,
                ExclusiveStartKey = queryRequest.ExclusiveStartKey.ToDictionary(kvp => kvp.Key, kvp => kvp.Value), // deep copy
                IndexName = queryRequest.IndexName,
                KeyConditions = queryRequest.KeyConditions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value),
                ReturnConsumedCapacity = queryRequest.ReturnConsumedCapacity,
                ScanIndexForward = queryRequest.ScanIndexForward,
                Select = queryRequest.Select,
                TableName = queryRequest.TableName,
                FilterExpression = queryRequest.FilterExpression, // <-- was missing
                ExpressionAttributeValues = queryRequest.ExpressionAttributeValues.ToDictionary(kvp => kvp.Key, kvp => kvp.Value) // <-- was missing
            };

and now the code works as expected when wanting to filter query results.