Nested conrtollers example

apps_controller.rb

class Admin::AppsController < Admin::BaseController
  before_filter :load_app
  
  def index
    @apps = App.all
  end
  
  def show
    load_app
  end
  
  def edit
    load_app
  end

  protected
  
  def load_app
    @app = App.find(params[:id])
  end

end

base_controlle.rb

class Admin::BaseController < ::ApplicationController
  layout "admin"

  before_filter :authenticate_user!
end

base_controller.rb

class Admin::Apps::BaseController < Admin::BaseController
  before_filter :find_app

  helper_method :selected_app

  protected

  def find_app
    @selected_app = App.find(params[:app_id])
  end

  def selected_app
    @selected_app
  end

end

free_subscriptions_controller.rb

class Admin::FreeSubscriptionsController < Admin::Apps::BaseController
  before_filter :load_products_and_users

  def new
    @subscription = build_subscription
  end

  def create
    product = load_product
    user = load_user

    service = Payments::CreateFreeSubscription.new(user, selected_app, product)
    result = service.call

    if result.success?
      redirect_to admin_subscriptions_path
    else
      flash.now[:alert] = result.error
      @subscription = result.error_data || build_subscription(subscription_params)
      render 'new'
    end
  end
  
  protected

  def load_products_and_users
    load_products
    load_users
  end

  def load_products
    @products = product_scope.pluck(:name, :id)
  end

  def load_product
    product_scope.find(params[:subscription][:product_id])
  end

  def product_scope
    Product.free.web
  end

  def load_users
    @users = app_managers.map{ |u| [u.email, u.id] }
  end

  def load_user
    user = app_managers.detect{|u| u.id == params[:subscription][:user_id].to_i }
    raise ActiveRecord::RecordNotFound unless user
    user
  end

  def app_managers
    selected_app.app_managers_with_active_email
  end
  
    def build_subscription(attrs = {})
    Subscription.new(attrs)
  end

  def subscription_params
    params.require(:subscription).permit(:product_id, :user_id)
  end

end

new.html.erb

<h2><%= t('subscription.create_free_subscription') %></h2>
<h3><%= link_to @app.name, admin_app_path(selected_app) %></h3>

<%= simple_form_for @subscription, url: admin_app_free_subscriptions_path(selected_app) do |f| %>
  <%= f.input :user_id, collection: @users %>
  <%= f.input :product_id, collection: @products %>
  <%= f.submit %>
<% end %>

pages_controller.rb

class Admin::PagesController < Admin::Apps::BaseController
  
  def index
    @pages = page_scope
  end
  
  def show
    @page = page_scope.find(params[:id])
  end
  
  protected
  
  def page_scope
    selected_app.pages
  end
  
end

payment_status_controller.rb

class Admin::Apps::PaymentStatusController < Admin::Apps::BaseController
  
  # url: /apps/1/payment_status
  # Controller file: app/controllers/apps/payment_status_controller.rb
  # View file: app/views/apps/payment_status/show.html.erb
  def show
    @payment_status = @app.payment_status
  end
  
end

routes.rb

Rails.application.routes.draw do

  namespace :admin, constraints: { host: Rails.application.secrets.domain } do

    resources :apps do
      resources :free_subscriptions, only: [:new, :create, :index]
      resources :pages
      resource :payment_status, controller: 'payment_status', module: 'apps'
    end

end

Dosya/klasor yapisi da su sekilde:

apps/controllers/admin/apps/base_controller.rb
apps/controllers/admin/free_subscriptions_controller.rb

apps/views/admin/free_subscriptions/new.html.erb