Rails 4 View Template Cache Digestor Compatibility #50
Description
Rails 4 pulls in cache digesting for fragment caching, which is fantastic. However, by default, only ERB templates are registered to be considered and parsed for cache key calculation.
As I would assume Haml support for cache digests wont get added to Rails, do you think it's appropriate to add the initializer code required to get that working into your gem?
@nzaillian suggested this to the haml gem in issue 708, for reference.
The following works for me in Rails 4 (a port of the code required to get this working in rails 3.x with the cache_digests gem and haml templates):
# config/initializers/cache_digests.rb
# Tell cache digests to parse haml view templates
# when calculating cache keys for view fragments
# as Rails only supports ERB by default
ActiveSupport.on_load(:action_view) do
ActiveSupport.on_load(:after_initialize) do
require 'action_view/dependency_tracker'
ActionView::DependencyTracker.register_tracker :haml, ActionView::DependencyTracker::ERBTracker
if Rails.env.development?
# recalculate cache digest keys for each request in development
# using blackhole cache until Rails path is released that allows us to
# simply set `config.cache_template_loading` false in development.rb
# https://github.com/rails/rails/pull/10791
class BlackHole < Hash
def []=(*); end
end
module ::ActionView
class Digestor
@@cache = BlackHole.new
end
end
end
end
endThoughts?