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-rw-r--r--activestorage/lib/active_storage.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage.rb b/activestorage/lib/active_storage.rb
index ccc1d4a163..44d9c25504 100644
--- a/activestorage/lib/active_storage.rb
+++ b/activestorage/lib/active_storage.rb
@@ -33,6 +33,8 @@ module ActiveStorage
autoload :Attached
autoload :Service
+ autoload :Previewer
mattr_accessor :verifier
+ mattr_accessor :previewers, default: []
end