rails paperclip and passenger `is not recognized by the 'identify' command`

Question

When I upload a photo, my model fails validation, err well even without any validations I\'m returned this error:

/tmp/stream20100103-13830-ywmerx-0 is not r         


        

Answer 1

This can also be caused by using fairly old versions of Paperclip (for example, version 2.4.x) with newer, incompatible versions of the Cocaine gem.