sitemap.xml for Rails 4 application

sitemap.xml

# Generate sitemap.xml in Rails app

This post shows how to make sitemap.xml for your web site.
The sitemap will be accessible by URL http://mysite.com/sitemap.xml

# Routes

```ruby

Myrails::Application.routes.draw do
  get "/sitemap.xml" => "sitemap#index", :format => "xml", :as => :sitemap

end


```

# Controller

```ruby
# app/controllers/sitemap_controller.rb

class SitemapController < ApplicationController

  def index
    respond_to do |format|
      format.xml
    end
  end

end


```

# View

XML will be generated using XML builder.
Create a view file 'sitemap/index.xml.builder' where you can use xml builder methods.

```ruby

# app/views/sitemap/index.xml.builder

base_url = "http://#{request.host_with_port}/"

xml.instruct! :xml, :version=>"1.0"
xml.tag! 'urlset', 'xmlns' => 'http://www.sitemaps.org/schemas/sitemap/0.9', 'xmlns:image' => 'http://www.google.com/schemas/sitemap-image/1.1', 'xmlns:video' => 'http://www.google.com/schemas/sitemap-video/1.1' do
  xml.url do
    xml.loc base_url
  end
  xml.url do
    xml.loc base_url+'about.html'
  end
  xml.url do
    xml.loc base_url+'contacts.html'
  end
end


```

# Generate XML dynamically

To do some refactoring let's prepare some data in controller for static pages and dynamic pages (like products).

controller:
```ruby

class SitemapController < ApplicationController

  def index

    @pages = ['', 'about.html', 'contacts.html']

    @products = Product.all

    respond_to do |format|
      format.xml
    end
  end

end

```

change view:
```ruby
# app/views/index.xml.builder

base_url = "http://#{request.host_with_port}/"

xml.instruct! :xml, :version=>"1.0"
xml.tag! 'urlset', 'xmlns' => 'http://www.sitemaps.org/schemas/sitemap/0.9', 'xmlns:image' => 'http://www.google.com/schemas/sitemap-image/1.1', 'xmlns:video' => 'http://www.google.com/schemas/sitemap-video/1.1' do
  xml << (render :partial => 'sitemap/common', pages: @pages)
  xml << (render :partial => 'sitemap/products', items: @products)

end

```

and our partials:

```ruby
# app/views/sitemap/_common.xml.builder

base_url = "http://#{request.host_with_port}/"

# pages = ['about.html', 'contacts.html' ]

pages.each do |page|
  xml.url do
    xml.loc base_url+page
  end

end
```

```ruby
# app/views/sitemap/_products.xml.builder

items.each do |item|
  xml.url do
    xml.loc product_path(item)
  end

end
```