```ruby
if defined?(ActiveSupport)
  require 'haml/template/options'
  ActiveSupport.on_load(:before_initialize) do
    ActiveSupport.on_load(:action_view) do
      require "haml/template"
    end
  end
end

module Haml
  class Railtie < ::Rails::Railtie
    initializer :haml do |app|
      if defined?(::Sass::Rails) && app.config.assets.enabled
        require "haml/sass_rails_filter"
      end
    end
  end
end

require "haml/helpers/safe_erubis_template"
Haml::Filters::Erb.template_class = Haml::SafeErubisTemplate```

Fix to support 'sass-rails' 4.0.0.beta
user
```ruby
if defined?(ActiveSupport)
  require 'haml/template/options'
  ActiveSupport.on_load(:before_initialize) do
    ActiveSupport.on_load(:action_view) do
      require "haml/template"
    end
  end
end

module Haml
  class Railtie < ::Rails::Railtie
    initializer :haml do |app|
      if defined?(::Sass::Rails::SassTemplate) && app.config.assets.enabled
        require "haml/sass_rails_filter"
      end
    end
  end
end

require "haml/helpers/safe_erubis_template"
Haml::Filters::Erb.template_class = Haml::SafeErubisTemplate```
assistant