# config/meta.yml
meta_product_name: "Product Name"
meta_title: "Product name - Product tagline"
meta_description: "Relevant description"
meta_image: "cover.png" # should exist in `app/assets/images/`
twitter_account: "@product_twitter_account" # required for Twitter Cards<!-- app/views/offers/show.html.erb -->
<% content_for :meta_title, "#{@offer.name} is on #{DEFAULT_META["meta_product_name"]}" %>
<% content_for :meta_description, @offer.description %>
<% content_for :meta_image, cl_image_path(@offer.photo.path) %>heroku config:set DOMAIN=www.my_product.com# app/controllers/application_controller.rb
def default_url_options
{ host: ENV["DOMAIN"] || "localhost:3000" }
end# config/initializers/default_meta.rb
# Initialize default meta tags.
DEFAULT_META = YAML.load_file(Rails.root.join("config/meta.yml"))