Date ranges overlapping Mongoid and Rails

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I'm working on a project that places "bookings" for a particular property. In order to prevent a property from being double booked, I am trying to return a result of properties that are unavailable during a given time frame. In my Booking model, I have :check_in and :check_out Date fields. My current query is returning dates that are inclusive to the given range only.

For example: Date1 = 04/01/2013 Date2 = 04/15/2013

Returns all Bookings that were placed in that range. But if a Booking was made, say on 03/15/2013 to 04/05/2013 I need it to return that result as well.

Here is my current query:

bookings = Booking.where(check_in: {'$gte' => params[:check_in].to_date, '$lte' =>   params[:check_out].to_date}, check_out: {'$gte' => params[:check_in].to_date,'$lte' => params[:check_out].to_date})


I'm not sure if this is the most elegant solution, but I got the following query to produce the expected results:

bookings = current_user.organization.corporate_bookings.or(check_in: (params[:check_in].to_date..params[:check_out].to_date)).or(check_out: (params[:check_in].to_date..params[:check_out].to_date)).or(check_in: {"$lte" => params[:check_in].to_date}, check_out: {'$gte' => params[:check_out].to_date})