MongoDB, Carrierwave, GridFS and prevention of files' duplication

Posted by Arkan on Stack Overflow See other posts from Stack Overflow or by Arkan
Published on 2010-12-28T13:49:53Z Indexed on 2010/12/28 13:54 UTC
Read the original article Hit count: 523

Filed under:

upload

|

mongodb

|

ruby-on-rails3

|

mongoid

|

gridfs

I am dealing with Mongoid, carrierwave and gridFS to store my uploads.

For example, I have a model Article, containing a file upload(a picture).

class Article
  include Mongoid::Document
  field :title, :type => String
  field :content, :type => String
  mount_uploader :asset, AssetUploader
end

But I would like to only store the file once, in the case where I'll upload many times the same file for differents articles.

I saw GridFS has a MD5 checksum.

What would be the best way to prevent duplication of identicals files ?

Thanks

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