Attachment_fu issues

Rails
1

Relying largely on Mike C.'s guidance:

http://clarkware.com/cgi/blosxom/2007/02/24

I’ve had limited success with attachment_fu. I’m able to upload
andsubsequently redisplay images through the browser. But, a few
things aren’t working right:

  1. Image size is sometimes 0 and sometimes actual size (more often 0).
    Can’t find a pattern, testing with jpg, png, gif with Firefox and IE.
    I’ve had to set the :size option to allow 0, otherwise validation
    prevents images from uploading (again, most of the time but not
    always).

  2. Images don’t resize even though option is set in model.

  3. Thumbnails aren’t generated even though option is set in model.
    Only the original image at it’s original size with it’s original name
    is stored.

Below is my model. I’m pretty new to rails so it’s entirely possible
I’ve done something idiotic. This is happening on Windows XP w/
InstantRails (haven’t tried it in my hosted environment yet).

class Mugshot < ActiveRecord::Base

has_attachment :content_type => :image,
:storage => :file_system,
:size => 0.kilobyte…2.megabytes,
:resize_to => [50, 50],
:thumbnails => { :thumb => [50, 50], :geometry => ‘x50’ },
:processor => ‘Rmagick’
validates_as_attachment

end

2

On 10 Aug 2007, at 00:04, P.F.Pluto wrote:

is stored.
There are a number of possibilities.

  1. and 3) are related to 1), so it has to do with the images you’re
    uploading. Attachment_fu will determine if it’s an image by checking
    the MIME type. This can lead to images not being recognized as images
    if the browser doesn’t upload them with the correct MIME type or if
    your images are corrupt.

To give you an example: when using a solution like SWFUpload to
upload images, all files will be streamed as application/octet-
stream, attachment_fu won’t recognize them as being images. In this
case, you need to “preprocess” the upload by mapping the extension of
the file to a mime type before passing it on to attachment_fu for
thumbnailing.

Best regards

Peter De Berdt

3

Thanks for your reply Peter. I was able to get 1) solved using the
sleep fix. Eric N.'s change to attachment_fu also fixed the
problem for me (both fixes described in this post):

http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/2150d2ebe267545a/dc13f21b1a4a87fc?lnk=gst&q=attachment_fu+sleep&rnum=1#dc13f21b1a4a87fc

However, I still haven’t been able to get thumbnails or resizing
working on my Windows development box.

I deployed to my OCS Solutions shared host and am not having any of
the problems. I’m starting to wonder if rails development and windows
don’t mix. Maybe I should bite the bullet and load linux or get a Mac.

4

Oops, the post was from me, inadvertantly using an alternate gmail
account of mine.

Thanks again for your reply Peter.