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-rw-r--r--actionpack/lib/action_view/helpers/asset_tag_helper.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/asset_tag_helper.rb b/actionpack/lib/action_view/helpers/asset_tag_helper.rb
index f6abea38ed..a32beb6100 100644
--- a/actionpack/lib/action_view/helpers/asset_tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/asset_tag_helper.rb
@@ -516,7 +516,8 @@ module ActionView
def compute_public_path(source, dir, ext = nil, include_host = true)
has_request = @controller.respond_to?(:request)
- if ext && (File.extname(source).blank? || File.exist?(File.join(ASSETS_DIR, dir, "#{source}.#{ext}")))
+ source_ext = File.extname(source)[1..-1]
+ if ext && (source_ext.blank? || (ext != source_ext && File.exist?(File.join(ASSETS_DIR, dir, "#{source}.#{ext}"))))
source += ".#{ext}"
end