gem 'activeadmin-seo', github: 'nebirhos/activeadmin-seo'
gem "activeadmin-dragonfly", github: "stefanoverna/activeadmin-dragonfly"

rake activeadmin_seo:install:migrations
rake db:migrate

class Page < ActiveRecord::Base
  attr_accessible :title, :content
  has_seo_meta :title
end

ActiveAdmin.register Page do
  form do |f|
    # ...
    f.seo_meta_inputs
    # ...
  end
end

has_seo_meta :field, tree: false, as: nil

has_seo_meta :field, as: :admin

has_seo_meta :field, nested: true

has_seo_meta skip_friendly_id: true

f.seo_meta_inputs slug_url_prefix: nil, open_graph_metas: false, basic_metas: false

f.seo_meta_inputs basic_metas: true, open_graph_metas: true

f.seo_meta_inputs basic_metas: [:title, :description],
                  open_graph_metas: [:title, :image]

f.seo_meta_inputs basic_metas: ['title', 'description'],
                  open_graph_metas: ['title', 'image']

f.seo_meta_inputs basic_metas: {
                    title: true,
                    description: true
                  },
                  open_graph_metas: {
                    title: true,
                    image: true
                  }

f.seo_meta_inputs basic_metas: true, slug: false

<%= seo_meta_tags(@page.seo_meta, @settings.seo_meta, title: "Something") %>

def show
  @page = Page.find_by_url params[:url]
  render text: @page.url # "/path/to/my/page"
end

get "*url" => "pages#show", constraints: ActiveAdmin::Seo::Routes.new(Page)

class Page < ActiveRecord::Base
  active_admin_translates :title, :content do
    has_seo_meta :title
  end
end

ActiveAdmin.register Page do
  form do |f|
    # ...
    f.translated_inputs do |t|
      t.input :title
      t.input :content
      # ...
      t.seo_meta_inputs
    end
    # ...
  end
end