Multitenant Storedom

_navbar.html.rb

<nav class="navbar navbar-default" role="navigation">
  <div class="navbar-header">
    <button class="navbar-toggle" data-target="#bs-example-navbar-collapse-1" data-toggle="collapse" type="button">
      <span class="sr-only">Toggle navigation</span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>
    <a class="navbar-brand" href="/">Storedom</a>
  </div>
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
    <ul class="nav navbar-nav">
      <% if @current_store %>
        <li>
          <%= link_to 'Items', store_items_path %>
        </li>
        <li>
          <%= link_to 'Orders', store_orders_path %>
        </li>
      <% end %>
    </ul>
  </div>
</nav>

item.rb

class Item < ActiveRecord::Base
  has_many :order_items
  has_many :orders, through: :order_items

  belongs_to :store
end

items_controller.rb

class Stores::ItemsController < Stores::StoresController
  def index
    @items = current_store.items
  end
end

orders_controller.rb

class Stores::OrdersController < Stores::StoresController
  def index
    @orders = current_store.orders
  end
end

orders_index.html.erb

<div class="container">
  <h1>Welcome to <%= current_store.name %></h1>
  <% @orders.each do |order| %>
    <div class="col-sm-12">
      <h2>Order <%= order.id %></h2>
      <h5>Client: <%= order.user.name %></h5>
      <h5>Order Items</h5>
      <% order.items.each_with_index do |item, index| %>
        <p>
          <%= "#{index + 1}. #{item.name}" %>
        </p>
      <% end %>
    </div>
  <% end %>
</div>

routes.rb

Rails.application.routes.draw do
  resources :items,  only: [:index, :show]
  resources :orders, only: [:index, :show]
  resources :users,  only: [:index, :show]

  namespace :stores, path: ':store', as: :store do
    resources :items,  only: [:index, :show]
    resources :orders, only: [:index, :show]
  end
  
  root 'stores#index'
end

store.rb

class Store < ActiveRecord::Base
  has_many :items
  has_many :orders

  validates :url, uniqueness: true, presence: true
  validates :name, presence: true

  before_validation :generate_url

  def generate_url
    self.url = name.parameterize
  end
end

stores_controller.rb

class StoresController < ApplicationController
  def index
    @stores = Store.all
  end
end

stores_controller_a.rb

class Stores::StoresController < ApplicationController
  before_action :store_not_found

  helper_method :current_store

  def current_store
    @current_store ||= Store.find_by(url: params[:store])
  end

  def store_not_found
    redirect_to root_path unless current_store
  end
end

stores_index.html.erb

<div class="container">
  <h1>Welcome to <%= current_store.name %></h1>
  <% @items.each do |item| %>
    <div class="col-sm-3">
      <h5><%= item.name %></h5>
      <%= link_to(image_tag(item.image_url), item_path(item)) %>
      <p>
        <%= item.description %>
      </p>
    </div>
  <% end %>
</div>