First, thank you so much for building an amazing library! It has helped us a lot in development of our new API, since we started with a documentation-driven approach. It allows us to ensure our implementation matches our spec. Please forgive me if this is a duplicate but I couldn't find it in your issue history.

We have some query parameters for an index operation that are defined as "filters" with a nested key for the attribute being filtered on. An example is GET /api/v1/events?filter[slug]=%2Ftest. Rack's Query Parser implementation turns the above into this params hash:

{
 "rack.request.query_string"=>"filter%5Bslug%5D=%2F",
 "rack.request.query_hash"=>{
 "filter"=>{
 "slug"=>"/test"
 }
 }
}

And then we get the following validation error:

#/paths/~1events/get missing required parameters: filter[slug]

Since it is a Rack specific behavior I didn't think this issue belonged in the openapi_parser library.

Thanks again!