How to remove a specific file in Rails public folder?

User in my web app are able to upload file. I use Paperclip to handle file attachment issue. Is there an开发者_开发问答y method if I would like to remove any specific user-uploaded file programmatically?

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Ruby's File class has a delete method:

File.delete(Rails.root + '/foo.jpg')

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Deleting it should be as simple as setting it to nil

# assuming...
has_attached_file :picture

@thing.picture = nil
@thing.save

or

@thing.update_attribute(:picture, nil)

and Paperclip will take care of it for you...