robban · March 11, 2012 15:29 · Mar 11, 2012
diff --git a/convert_images_to_paperclip.rb b/convert_images_to_paperclip.rb
@@ -0,0 +1,51 @@
+class ConvertImagesToPaperclip
+
+  def self.convert_all
+
+    # Update table information
+    Photo.reset_column_information
+
+    # Delete all attachement_fu image sizes
+    Photo.delete_all("parent_id IS NOT NULL")
+
+    # Migrate data
+    Photo.all.each do |photo|
+      populate_paperclip_from_attachment_fu(photo, photo, 'photo', 'photos') if photo
+      photo.photo.reprocess! if photo.photo
+    end
+
+  end
+
+
+  def self.populate_paperclip_from_attachment_fu(model, attachment, prefix, path_prefix)
+    unless attachment.photo_file_name.nil?
+      # The columns have already been renamed by migration
+      #model.send("#{prefix}_file_name=", attachment.photo_filename)
+      #model.send("#{prefix}_content_type=", attachment.content_type)
+      #model.send("#{prefix}_file_size=", attachment.size)
+      puts "# data_file_name: #{model.send("#{prefix}_file_name")}"
+      puts "# data_content_type: #{model.send("#{prefix}_content_type")}"
+      puts "# data_file_size: #{model.send("#{prefix}_file_size")}"
+
+      # Get file path from attachment_fu
+      file_path = ("%08d" % model.id).scan(/..../).join('/')
+      old_path = File.join(Rails.root, 'public', path_prefix, file_path, attachment.photo_file_name)
+      # Need to use URI::decode to handle files with åäö in
+      new_path = model.send(prefix).path(:original)
+      new_folder = File.dirname(new_path)
+
+      if File.exists?(old_path)
+        unless File.exists?(new_folder)
+          FileUtils.mkdir_p(new_folder)
+        end
+
+        puts "Copying #{old_path} to #{new_path}"
+        system("cp #{old_path} #{new_path}")
+        model.save
+      else
+        puts "No such file: #{old_path}"
+      end
+    end
+  end
+
+end
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