ruby on rails - Append query string to url -

i have callback url string params[:callback] , need append query string "&result=true" , redirect user. better way found of doing using addressable think code big task when talking ruby:

callback = addressable::uri.parse(params[:callback]) query = callback.query_values query[:result] = 'true' callback.query_values = query  redirect_to callback.to_s 

is there more elegant way of getting same result snippet?

• if don't need url validations can (looks little bit dirty):

   url = params[:callback] redirect_to url + (url.include?('?') ? '&' : '?') + 'result=true' 

• otherwise have use either external library (like addressable) or uri module standard library