```ruby
require 'restclient'

module JustDial
  class Search
    def initialize(url, auth_tokens={})
      @url = url
      @auth_tokens = auth_tokens
    end

    def execute(params={})
      valid_params = params.select { |key| [:query, :city, :area].include?(key) } # TODO: Implement Hash.slice
      latitude = params[:latitude]
      longitude = params[:longitude]
      geolocation_params = {}
      geolocation_params[:geolocation] = "#{latitude},#{longitude}" if !latitude.nil? && !longitude.nil?
      page_size = params[:num_res] || 100
      request_params = @auth_tokens.merge(valid_params).merge(geolocation_params).merge({:num_res => page_size})
      puts "Request: #{@url}/#{request_params.to_param}"

      RestClient.get(@url, {:params => request_params}) { |response, request, result, &block|
        puts "Response: #{response.code}, #{response.to_s}"

        case response.code
          when 200
            Provider.parse(response.to_s)
          else
            raise 'Bad Request'
        end
      }
    end
  end
end
```

Fix failing spec and logging. to_param is ActiveModel feature which is not available here.
user
```ruby
require 'restclient'

module JustDial
  class Search
    def initialize(url, auth_tokens={})
      @url = url
      @auth_tokens = auth_tokens
    end

    def execute(params={})
      valid_params = params.select { |key| [:query, :city, :area].include?(key) } # TODO: Implement Hash.slice
      latitude = params[:latitude]
      longitude = params[:longitude]
      geolocation_params = {}
      geolocation_params[:geolocation] = "#{latitude},#{longitude}" if !latitude.nil? && !longitude.nil?
      page_size = params[:num_res] || 100
      request_params = @auth_tokens.merge(valid_params).merge(geolocation_params).merge({:num_res => page_size})
      puts "Request: url: #{@url} params: #{request_params}"

      RestClient.get(@url, {:params => request_params}) { |response, request, result, &block|
        puts "Response: #{response.code}, #{response.to_s}"

        case response.code
          when 200
            Provider.parse(response.to_s)
          else
            raise 'Bad Request'
        end
      }
    end
  end
end
```
assistant