Ruby on Rails

Hello. I have a search form with two search engines (sphinx, elasticsearch), I need to add filters by parameters (name, cost, direction, country). Something like this http://funkyimg.com/i/Cdyk.png. The problem is, I don't know how to pass all this queries from the form to the one search query so that I can handle filters inside the search engine (f.e. filters are working if search query passed to one search form).

Not sure if I explained it well.

Here's an example:
I enter "lorem" in the main search field, then in the "Name" field I enter "Australia" all this goes to the one search query (it is in params[:query]), so result is -  only first tour should be displayed.
Again, it works when there is one field.

tours_controller: http://paste2.org/CZXHdMO1

Thanks.