attachment_fu Resizing Mysteriously Stopped Working

rubyonrails-talk
1

Hello,

Recently attachment_fu stopped resizing images for me. I'm puzzled because before today it was resizing them and I don't know what's changed. Here's my code:

class Product < ActiveRecord::Base     has_attachment :content_type => :image,                    :storage => :file_system,                    :max_size => 18.megabytes,                    :resize_to => '300x',                    :thumbnails => { :thumb => '61x110!' }     validates_as_attachment end

I expected a 420x595 image to be resized to 300xWhatever and a 61x110 thumbnail to be created. The image and thumbnail product records were both created in the database but the images were left at the original size.

Strangely the width and height fields in the database are no longer being set. For new uploads they are null whereas previously they had been set to the measurements of the resized images.

I think I've traced the problem to this method (but I could equally well be barking up the wrong tree):

attachment_fu/processors/rmagick_processor.rb:

            module ClassMethods             # Yields a block containing an RMagick Image for the given binary data.             def with_image(file, &block)               begin                 binary_data = file.is_a?(Magick::Image) ? file : Magick::Image.read(file).first unless !Object.const_defined?(:Magick)                 puts "binary_data.nil? : #{binary_data.nil?}"                 puts "file.nil?: #{file.nil?}"                 puts "const_defined? : #{Object.const_defined?(:Magick)}"               rescue                 # Log the failure to load the image. This should match ::Magick::ImageMagickError                 # but that would cause acts_as_attachment to require rmagick.                 logger.debug("Exception working with image: #{$!}")                 binary_data = nil               end               block.call binary_data if block && binary_data             ensure               !binary_data.nil?             end           end

My puts statements give this output:

   binary_data.nil? : true    file.nil?: false    const_defined? : false

So it looks like the undefined constant prevents binary_data from being assigned. But I don't know what to do about this.

I'd appreciate any help.

Thanks and regards, Andy Stewart

2

Recently attachment_fu stopped resizing images for me. I'm puzzled because before today it was resizing them and I don't know what's changed. Here's my code:

Just for the record, I found the cause of the problem.

Originally I installed attachment_fu and created all my Product instances. Every image was resized perfectly.

Then I tried to interact with these Products in the console but RMagick kept blowing up with this error:

   >> Product.find 1    /usr/local/lib/ruby/gems/1.8/gems/rmagick-1.14.1/lib/RMagick.bundle: [BUG] Bus Error    ruby 1.8.4 (2005-12-24) [powerpc-darwin8.4.0]

   Abort trap

To get round this, I added a one-line file called RMagick.rb to my lib/ directory. This was recommended by Rick Olson somewhere on the Mephisto site.

   lib/RMagick.rb:

     raise LoadError

Hooray! Now the console works:

>> Product.find 1 => #<Product:0x2663628 @attributes={"content_type"=>"image/jpeg", "name"=>...blah...}

Unfortunately this prevents attachment_fu from resizing images uploaded via a form. So to create new products via the form I have to move the lib/RMagick.rb hack away first.

Hope this helps somebody else.

Regards, Andy Stewart