Pass the template format to the digestor

This commit passes the template format to the digestor in order to come
up with a key.  Before this commit, the digestor would depend on the
side effect of the template renderer setting the rendered_format on the
lookup context.  I would like to remove that mutation, so I've changed
this to pass the template format in to the digestor.

I've introduced a new instance variable that will be alive during a
template render.  When the template is being rendered, it pushes the
current template on to a stack, setting `@current_template` to the
template currently being rendered.  When the cache helper asks the
digestor for a key, it uses the format of the template currently on the
stack.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
index 388f9e5e56..9f1de5a397 100644
--- a/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
@@ -54,7 +54,7 @@ module ActionView
       def collection_by_cache_keys(view, template)
         seed = callable_cache_key? ? @options[:cached] : ->(i) { i }
 
-        digest_path = view.digest_path_from_virtual(template.virtual_path)
+        digest_path = view.digest_path_from_template(template)
 
         @collection.each_with_object({}) do |item, hash|
           hash[expanded_cache_key(seed.call(item), view, template, digest_path)] = item