Using rgmagick and getting error for file not found

Using rmagick to find the colors of an image..

img = Magick::Image.read("#{Rails.root}/public#{@design.photo.url(:profile)}").first

Here is the error

unable to open image `/tmt/public/system/designs/photos/000/000/005/profile/5.jpg?1380037883': No such file or directory @ error/blob.c/OpenBlob/2646

The file is pointing to the exact location of the image, maybe the extension (?1380037883) is throwing it off but i can't seem to solve the problem. Do y'all know what's going on? Maybe you've seen a similar problem using rgmagick...heres my gemfile

gem 'rmagick', :require => 'RMagick'

If i point to an image in my app/assets/images directory it works perfectly...it's just when im using variables to find the image a user uploads that is has this error...

for instance this works perfectly

img = Magick::Image.read("#{Rails.root}/app/assets/images/ruby.png").first

Solution

You should use the .path method instead of .url:

.url returns the relative path of the file
.path returns the absolute path of the file

In your case:

img = Magick::Image.read( @design.photo.path ).first