Ironed out the refresh task clobbering problem.

git-svn-id: https://svn.thoughtbot.com/plugins/paperclip/trunk@217 7bbfaf0e-4d1d-0410-9690-a8bb5f8ef2aa

lib/paperclip.rb

@@ -346,9 +346,11 @@ module Thoughtbot #:nodoc:
         return if attachment[:files].blank?
         ensure_directories_for attachment
         attachment[:files].each do |style, atch|
+          atch.rewind
+          data = atch.read
           File.open( path_for(attachment, style), "w" ) do |file|
-            atch.rewind
-            file.write(atch.read)
+            file.rewind
+            file.write(data)
           end
         end
         attachment[:files] = nil
@@ -367,6 +369,8 @@ module Thoughtbot #:nodoc:
       end
 
       def make_thumbnails attachment
+        attachment[:files] ||= {}
+        attachment[:files][:original] ||= File.new( path_for(attachment, :original) )
         attachment[:thumbnails].each do |style, geometry|
           begin
             attachment[:files][style] = make_thumbnail(attachment, attachment[:files][:original], geometry)
@@ -451,6 +455,7 @@ module Thoughtbot #:nodoc:
           data.content_type = uri.content_type
           data
         rescue OpenURI::HTTPError => e
+          self.errors.add_to_base("The file at #{uri.to_s} could not be found.")
           $stderr.puts "#{e.message}: #{uri.to_s}"
           return nil
         end
@@ -487,7 +492,12 @@ module Thoughtbot #:nodoc:
       
       # Returns the file's normal name.
       def original_filename
-        self.path
+        @original_filename ||= self.path
+      end
+      
+      # In case we need to override the name, like in the case of refreshing.
+      def original_filename= name
+        @original_filename = name
       end
       
       # Returns the size of the file.

tasks/paperclip_tasks.rake

+require 'environment'
+
 def obtain_class
   class_name = ENV['CLASS'] || ENV['class']
   @klass = eval(class_name)
@@ -22,9 +24,12 @@ namespace :paperclip do
     puts "Regenerating thumbnails for #{instances.length} instances:"
     instances.each do |instance|
       names.each do |name|
-        original_file = instance.send("#{name}_file_name", :original)
-        next if original_file.blank?
-        instance.send("#{name}=", File.new(original_file))
+        # original_file = instance.send("#{name}_file_name", :original)
+        # next if original_file.blank?
+        # original_name = instance["#{name}_file_name"]
+        # file = File.new(original_file)
+        # file.original_filename = original_name
+        # instance.send("#{name}=", file)
         instance.send("process_#{name}_thumbnails")
       end
       print instance.save ? "." : "x"; $stdout.flush