Rails - Mime not working for paperclip

I'm using Paperclip, when I upload files like PPTX or DOCX, the content_type is showing application/zip which is a incorrect MIME type. Any suggestion开发者_开发百科s for fixing mime types in Rails 3?

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Did you add the mime type to /config/initializers/mime_types.rb?

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try to use paperclip Model with this validation

validates_attachment_content_type :attachment, :content_type => [ 'application/msword', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' ]

append other in you initializer if you need .