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rake paperclip:refresh:missing_styles

just thought I can leave it here

module Paperclip module Helpers

# Find all instances of the given Active Record model +klass+ with attachment +name+.
# This method is used by the refresh rake tasks.
def each_instance_with_attachment(klass, name)
  class_for(klass).unscoped.ne("#{name}_file_name" => nil).each do |instance|
    yield(instance)
  end
end

end end