Teach DetailsKey how to clear the template cache

This commit exposes all system wide view paths so that we can clear
their caches.

5 files changed, 38 insertions, 11 deletions

diff --git a/actionview/lib/action_view/lookup_context.rb b/actionview/lib/action_view/lookup_context.rb
index 0387fd0e83..1cc0a55c31 100644
--- a/actionview/lib/action_view/lookup_context.rb
+++ b/actionview/lib/action_view/lookup_context.rb
@@ -78,6 +78,10 @@ module ActionView
       end
 
       def self.clear
+        ActionView::ViewPaths.all_view_paths.each do |path_set|
+          path_set.each(&:clear_cache)
+        end
+        ActionView::LookupContext.fallbacks.each(&:clear_cache)
         @view_context_class = nil
         @details_keys.clear
         @digest_cache.clear
diff --git a/actionview/lib/action_view/view_paths.rb b/actionview/lib/action_view/view_paths.rb
index d5694d77f4..3ca5aedc14 100644
--- a/actionview/lib/action_view/view_paths.rb
+++ b/actionview/lib/action_view/view_paths.rb
@@ -5,13 +5,21 @@ module ActionView
     extend ActiveSupport::Concern
 
     included do
-      class_attribute :_view_paths, default: ActionView::PathSet.new.freeze
+      ViewPaths.set_view_paths(self, ActionView::PathSet.new.freeze)
     end
 
     delegate :template_exists?, :any_templates?, :view_paths, :formats, :formats=,
              :locale, :locale=, to: :lookup_context
 
     module ClassMethods
+      def _view_paths
+        ViewPaths.get_view_paths(self)
+      end
+
+      def _view_paths=(paths)
+        ViewPaths.set_view_paths(self, paths)
+      end
+
       def _prefixes # :nodoc:
         @_prefixes ||= begin
           return local_prefixes if superclass.abstract?
@@ -29,6 +37,22 @@ module ActionView
         end
     end
 
+    # :stopdoc:
+    @all_view_paths = {}
+
+    def self.get_view_paths(klass)
+      @all_view_paths[klass] || get_view_paths(klass.superclass)
+    end
+
+    def self.set_view_paths(klass, paths)
+      @all_view_paths[klass] = paths
+    end
+
+    def self.all_view_paths
+      @all_view_paths.values.uniq
+    end
+    # :startdoc:
+
     # The prefixes used in render "foo" shortcuts.
     def _prefixes # :nodoc:
       self.class._prefixes
diff --git a/actionview/test/template/log_subscriber_test.rb b/actionview/test/template/log_subscriber_test.rb
index 4574b798d9..83bb651ea3 100644
--- a/actionview/test/template/log_subscriber_test.rb
+++ b/actionview/test/template/log_subscriber_test.rb
@@ -11,9 +11,9 @@ class AVLogSubscriberTest < ActiveSupport::TestCase
   def setup
     super
 
+    ActionView::LookupContext::DetailsKey.clear
+
     view_paths = ActionController::Base.view_paths
-    view_paths.each(&:clear_cache)
-    ActionView::LookupContext.fallbacks.each(&:clear_cache)
 
     lookup_context = ActionView::LookupContext.new(view_paths, {}, ["test"])
     renderer       = ActionView::Renderer.new(lookup_context)
diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index b8d8717db4..bbecc404be 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -631,9 +631,8 @@ class CachedViewRenderTest < ActiveSupport::TestCase
 
   # Ensure view path cache is primed
   def setup
+    ActionView::LookupContext::DetailsKey.clear
     view_paths = ActionController::Base.view_paths
-    view_paths.each(&:clear_cache)
-    ActionView::LookupContext.fallbacks.each(&:clear_cache)
     assert_equal ActionView::OptimizedFileSystemResolver, view_paths.first.class
     setup_view(view_paths)
   end
@@ -650,9 +649,9 @@ class LazyViewRenderTest < ActiveSupport::TestCase
   # Test the same thing as above, but make sure the view path
   # is not eager loaded
   def setup
+    ActionView::LookupContext::DetailsKey.clear
+
     view_paths = ActionController::Base.view_paths
-    view_paths.each(&:clear_cache)
-    ActionView::LookupContext.fallbacks.each(&:clear_cache)
     path = ActionView::FileSystemResolver.new(FIXTURE_LOAD_PATH)
     view_paths = ActionView::PathSet.new([path])
     assert_equal ActionView::FileSystemResolver.new(FIXTURE_LOAD_PATH), view_paths.first
@@ -710,10 +709,10 @@ class CachedCollectionViewRenderTest < ActiveSupport::TestCase
 
   # Ensure view path cache is primed
   setup do
+    ActionView::LookupContext::DetailsKey.clear
+
     view_paths = ActionController::Base.view_paths
     assert_equal ActionView::OptimizedFileSystemResolver, view_paths.first.class
-    view_paths.each(&:clear_cache)
-    ActionView::LookupContext.fallbacks.each(&:clear_cache)
 
     ActionView::PartialRenderer.collection_cache = ActiveSupport::Cache::MemoryStore.new
 
diff --git a/actionview/test/template/streaming_render_test.rb b/actionview/test/template/streaming_render_test.rb
index 4567ee31b4..a5b59a700e 100644
--- a/actionview/test/template/streaming_render_test.rb
+++ b/actionview/test/template/streaming_render_test.rb
@@ -7,9 +7,9 @@ end
 
 class SetupFiberedBase < ActiveSupport::TestCase
   def setup
+    ActionView::LookupContext::DetailsKey.clear
+
     view_paths = ActionController::Base.view_paths
-    view_paths.each(&:clear_cache)
-    ActionView::LookupContext.fallbacks.each(&:clear_cache)
 
     @assigns = { secret: "in the sauce", name: nil }
     @view = ActionView::Base.with_empty_template_cache.with_view_paths(view_paths, @assigns)