How can I make a custom path for a model?

I'm using FriendlyID to make my URLs look nice, so what I got now is:

/items/my-personal-item

But what I would like is:

/user1/my-personal-item

Where user1 is the username of a user owning my-personal-item.

#config/routes.rb
resources :users, path: "" do
   resources :items, path: "", only: [:show, :index] #-> url.com/:user_id/
end

FriendlyID has to reside in any model with which you're using, so if you wanted to use it on User as well as Item, you'd have to use the following setup:

#app/models/user.rb
class User < ActiveRecord::Base
  extend FriendlyId
  friendly_id :username
end

#app/models/item.rb
class Item < ActiveRecord::Base
  extend FriendlyId
  friendly_id :title
end

This should give you the ability to call: url.com/user-name/my-personal-item

--

If you wanted to back it all up with the appropriate controller actions, you could use the following:

#app/controllers/items_controller.rb
class ItemsController < ApplicationController
   def show
     @user = User.find params[:user_id]
     @item = @user.items.find params[:id]
   end
end

---

As a pro-tip, you'll want to look at the friendly_id initializer to set some defaults for your app:

#config/initializers/friendly_id.rb
config.use :slugged #-> make sure this is valid
config.use :finders #-> make sure this is valid

By setting the above options, you'll just be able to call friendly_id [[attribute]] in your models.