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-rw-r--r--actionpack/lib/action_view/template/resolver.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/template/resolver.rb b/actionpack/lib/action_view/template/resolver.rb
index 08155af013..fa2038f78d 100644
--- a/actionpack/lib/action_view/template/resolver.rb
+++ b/actionpack/lib/action_view/template/resolver.rb
@@ -171,7 +171,9 @@ module ActionView
def extract_handler_and_format(path, default_formats)
pieces = File.basename(path).split(".")
pieces.shift
- handler = Template.handler_for_extension(pieces.pop)
+ extension = pieces.pop
+ ActiveSupport::Deprecation.warn "The file #{path} did not specify a template handler. The default is currently ERB, but will change to RAW in the future." unless extension
+ handler = Template.handler_for_extension(extension)
format = pieces.last && Mime[pieces.last]
[handler, format]
end