如何在Ruby on Rails中的URL中传递和接收参数？

Question

I am new to ruby, i would like to pass parameters in the url and receive it in controller.

I am expecting operation like

www.mysite.com/getuser/id/22

where getuser is the param name and 22 is its value.

Please provide me if there is any useful links that i can refer to.

Thanks in advance

Answer 1

Please read everything in the Rails Guide to Routing . There are two main cases there:

• RESTful routes: only use GET, PUT, POST, DELETE. Rails maps that by using the method resources . resources :pages will lead to the following routes (and URLs) automatically:

    sites GET /sites(.:format) {:action=>"index", :controller=>"sites"} POST /sites(.:format) {:action=>"create", :controller=>"sites"} new_site GET /sites/new(.:format) {:action=>"new", :controller=>"sites"} edit_site GET /sites/:id/edit(.:format) {:action=>"edit", :controller=>"sites"} site GET /sites/:id(.:format) {:action=>"show", :controller=>"sites"} PUT /sites/:id(.:format) {:action=>"update", :controller=>"sites"} DELETE /sites/:id(.:format) {:action=>"destroy", :controller=>"sites"} 

• Other routes: There is a rich set of methods you can use in your routes file to add additional routes. But keep in mind: If you just want to address a resource, it is better to stick to restful routes. A typical example is_ match ':controller(/:action(/:id))' . This allows URLs like:

  • localhost:3000/sites/help : controller == SitesController , action == help
  • localhost:3000/sites/search/something : controller == SitesController , action == search , parameter in params is something under the key id . So inside the action search , you will find params[:id] bound to "something" .

Answer 2

In your config/routes.rb file you write:

resources :users 

Then you create the controller:

rails g controller users 

Inside your controller file you have something(contrived) there like :

def show 
  my_id_param = params[:id]
end 

When you go to: www.mysite.com/user/22

my_id_param will be 22

I think rails guides are quite good resource, just google for them, has ton of good info there.