How to specify nested parameters in the routes

In routes.rb I have described how the search will look like this

match "results//:transaction/:city(.:format)" => "search#index", :as => :seo_search_index

which generates me this kind of routes

seo_search_index         /results/:transaction/:city(.:format) {:action=>"index", :controller=>"search"}

And the params object is filled with

params[:tra开发者_开发问答nsaction]
params[:city]
params[:zip5]

But I want the param object to be filled like this

params[:search][:transaction]
params[:search][:city]
params[:search][:zip5]

Is there a way to specify this like this

Just an example:

match "results//:search[transaction]/:search[city](.:format)" => "search#index", :as => :seo_search_index

I'm not sure there's a way to tell the Rails routing system that you want your parameters nested. You could work around this issue with a before filter in your controller:

class MyController < ApplicationController
  before_filter do
    params[:search] = params.slice(:transaction, :city, :zip5)
  end
end

Update

To answer your real question, you could do either:

seo_search_index_url(@search)

or

seo_search_index_url(@search.slice(:transaction, :city, :zip5))

depending on whether the @search hash contains only the keys you want or some additional ones.

With the help routing filter you can make what ever you want with the urls https://github.com/svenfuchs/routing-filter