How to handle routes in rails api -

i learning api on rails,and code below

routes.rb

require 'api_constraints'  rails.application.routes.draw    devise_for :users    namespace :api, defaults: { format: :json }, constraints: { subdomain: 'api' }, path: '/'      scope module: :v1, constraints: apiconstraints.new(version: 1, default: true)       resources :users, :only => [:show]     end    end end 

users_controllers.rb

class api::v1::userscontroller < applicationcontroller   respond_to :json    def show     respond_with user.find(params[:id])   end  end 

when run rails server localhost:3000/users/1 gives me error no route matches checked routes using rake routes , included in routes

`api_user        /users/:id(.:format)     api/v1/users#show' 

but don't know why gives me error

api_constraints.rb

class apiconstraints   def initialize(options)     @version = options[:version]     @default = options[:default]   end    def matches?(req)     @default || req.headers['accept'].include?("application/vnd.marketplace.v#{@version}")   end end 

`

try following:

api.lvh.me:3000/api/v1/users/1 

you've setup constraint requires api sub domain. you'll need remove constraint make following work:

lvh.me:3000/api/v1/users/1 

note: lvh.me points 127.0.0.1