@mariash Yeah, so the problem is :timestamp was renamed to :event_timestamp.  I added an alias in the model but the alias only applies to model operations not queries.  So, when you a query for :timestamp comes in we need to translate that to :event_timestamp.  That is what this configuration is doing along with the changes to base.rb and query.rb.  Allowing api queries to :timestamp to come in and then translate them to :event_timestamp for the db query.

Does that make sense?