Rails 3, windows, Paperclip can't make thumbnails - windows

Question

So I am using windows 7, Rails 3, latest paperclip gem and ImageMagick-6.7.7-Q16 (tested in cmd), my PATH environment is updated.
Model
class Image < ActiveRecord::Base
attr_accessible :description, :user_id, :file
has_attached_file :file, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :storage => :filesystem
belongs_to :user
#validations
validates_attachment_presence :file
validates_attachment_size :file, :less_than => 4.megabytes
validates_attachment_content_type :file, :content_type => [ 'image/gif', 'image/png', 'image/x-png', 'image/jpeg', 'image/pjpeg', 'image/jpg' ]
end
Form
<%= form_for(#image, :html => { :multipart => true }) do |image| %>
<div class="control-group">
<%= image.label :description, "Description", :class => 'control-label' %>
<div class="controls">
<div class="input-prepend">
<%= image.text_field :description %>
</div>
</div>
</div>
<div class="control-group">
<%= image.label :file, "Image", :class => 'control-label' %>
<div class="controls">
<div class="input-prepend">
<%= image.file_field :file %>
</div>
</div>
</div>
<%= image.hidden_field :user_id, :value => current_user.id %>
<div class="actions">
<%= image.submit "Upload Image", :class => 'btn btn-primary btn-medium' %>
</div>
<% end %>
My paperclip.rb in initializers
require "paperclip"
Paperclip.options[:command_path] = 'C:\Program Files (x86)\ImageMagick-6.7.7-Q16'
Paperclip.options[:swallow_stderr] = false
Paperclip.options[:whiny_thumbnails] = true
Everything is working fine without cropping (:styles => { :medium => "300x300>", :thumb => "100x100>" }). But when I want to make thumbnails Paperclip throws this error
Command :: identify -format %wx%h "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]"
Command :: convert "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]" -resize "300x300>" "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw520120519-7696-1p8rcsr"
[paperclip] An error was received while processing: #<Paperclip::Error: There was an error processing the thumbnail for DSCN630520120519-7696-18l3nw5>
Command :: identify -format %wx%h "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]"
Command :: convert "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]" -resize "100x100>" "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw520120519-7696-tx3bmo"
[paperclip] An error was received while processing: #<Paperclip::Error: There was an error processing the thumbnail for DSCN630520120519-7696-18l3nw5>
I figured out that uploaded image isn't even in temp folder, so those created images just have 0 bytes. I'm completely stuck here dunno if something wrong is with paperclip or image upload.
Any help will be appreciated

Answer 1

This probably means you're not pointing to IM properly. Either you don't have it installed yet or just not finding it as expected. Use double backslashes instead: 'C:\\Program Files (x86)\\ImageMagick-6.7.7-Q16'. (In order to avoid white spaces you can also use 8.3 filenames system to identify the path with regular slashes.)
If you're using the last version of Paperclip (3.1.4), on Windows I recommend you to install File package from GnuWin32. Please see this post: https://github.com/thoughtbot/paperclip/issues/926.
Finally, in order to support non-English characters in filenames, you might want to monkey patch Cocaine. I put a cocaine_path.rb between my initializers. Be aware that 'iso-8859-1' might not be the proper encoding for you.
cocaine_pacth.rb:
if RUBY_PLATFORM == "i386-mingw32"
module Cocaine
class CommandLine
def run
output = ''
begin
with_modified_path do
#logger.info("\e[32mCommand\e[0m :: #{command}") if #logger
ec = Encoding::Converter.new("utf-8", "iso-8859-1")
output = self.class.send(:'`', ec.convert(command.encode('UTF-8')))
end
rescue Errno::ENOENT
raise Cocaine::CommandNotFoundError
end
if $?.exitstatus == 127
raise Cocaine::CommandNotFoundError
end
unless #expected_outcodes.include?($?.exitstatus)
raise Cocaine::ExitStatusError, "Command '#{command}' returned #{$?.exitstatus}. Expected #{#expected_outcodes.join(", ")}"
end
output
end
end
end
end
This covers all the issues I have had with Paperclip on Windows in the last days. I hope it helps.