1 files changed, 10 insertions, 15 deletions
diff --git a/actionview/lib/action_view/renderer/partial_renderer.rb b/actionview/lib/action_view/renderer/partial_renderer.rb
index f8a6f13ae9..ed8d5cf54e 100644
--- a/actionview/lib/action_view/renderer/partial_renderer.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer.rb
@@ -314,14 +314,6 @@ module ActionView
         template = nil
       end
 
-      @lookup_context.rendered_format ||= begin
-        if template && template.formats.first
-          template.formats.first
-        else
-          formats.first
-        end
-      end
-
       if @collection
         render_collection(context, template)
       else
@@ -334,10 +326,13 @@ module ActionView
       def render_collection(view, template)
         identifier = (template && template.identifier) || @path
         instrument(:collection, identifier: identifier, count: @collection.size) do |payload|
-          return nil if @collection.blank?
+          return RenderedCollection.empty(@lookup_context.formats.first) if @collection.blank?
 
-          if @options.key?(:spacer_template)
-            spacer = find_template(@options[:spacer_template], @locals.keys).render(view, @locals)
+          spacer = if @options.key?(:spacer_template)
+            spacer_template = find_template(@options[:spacer_template], @locals.keys)
+            build_rendered_template(spacer_template.render(view, @locals), spacer_template)
+          else
+            RenderedTemplate::EMPTY_SPACER
           end
 
           collection_body = if template
@@ -347,7 +342,7 @@ module ActionView
           else
             collection_without_template(view)
           end
-          collection_body.join(spacer).html_safe
+          build_rendered_collection(collection_body, spacer)
         end
       end
 
@@ -369,7 +364,7 @@ module ActionView
 
           content = layout.render(view, locals) { content } if layout
           payload[:cache_hit] = view.view_renderer.cache_hits[template.virtual_path]
-          content
+          build_rendered_template(content, template, layout)
         end
       end
 
@@ -460,7 +455,7 @@ module ActionView
           content = template.render(view, locals)
           content = layout.render(view, locals) { content } if layout
           partial_iteration.iterate!
-          content
+          build_rendered_template(content, template, layout)
         end
       end
 
@@ -482,7 +477,7 @@ module ActionView
           template = (cache[path] ||= find_template(path, keys + [as, counter, iteration]))
           content = template.render(view, locals)
           partial_iteration.iterate!
-          content
+          build_rendered_template(content, template)
         end
       end