Create stubs for controller and model

app/assets/javascripts/sites.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

app/controllers/sites_controller.rb

@@ -0,0 +1,16 @@
+class SitesController < ApplicationController
+  def administrate
+  end
+
+  def create
+  end
+
+  def show
+  end
+
+  def update
+  end
+
+  def destroy
+  end
+end

app/models/site.rb

@@ -0,0 +1,9 @@
+class Site < ActiveRecord::Base
+  belongs_to :article
+  attr_accessible :name
+
+  validates :name,
+            length: {in: 2..10},
+            uniqueness: true,
+            format: /\A[a-z\-]{2,10}\Z/
+end

app/views/sites/administrate.html.erb

@@ -0,0 +1,2 @@
+<h1>Site#administrate</h1>
+<p>Find me in app/views/site/administrate.html.erb</p>

config/routes.rb

@@ -1,4 +1,5 @@
 Ensl::Application.routes.draw do
+
   %w(403 404 422 500).each do |code|
     get code, to: "errors#show", code: code
   end
@@ -135,6 +136,11 @@ Ensl::Application.routes.draw do
   match "votes/create"
   match "polls/showvotes/:id", to: "polls#showvotes", as: "polls_showvotes"
 
+  get "sites/administrate"
+  resource :sites, only: [:create, :update, :destroy]
+
+  get ":name", requirements: {name: /\A[a-z\-]{2,10}\Z/}
+
   match ":controller/:action", requirements: { action: /A-Za-z/ }
   match ":controller/:action/:id"
   match ":controller/:action/:id.:format"

db/migrate/20171109165433_create_sites.rb

@@ -0,0 +1,12 @@
+class CreateSites < ActiveRecord::Migration
+  def change
+    create_table :sites do |t|
+      t.string :name
+      t.references :article
+
+      t.timestamps
+    end
+    add_index :sites, :name
+    add_index :sites, :article_id
+  end
+end