Replace the file_column plugin with paperclip

db/migrate/20120123184321_switch_to_paperclip.rb

@@ -0,0 +1,9 @@
+class SwitchToPaperclip < ActiveRecord::Migration
+  def up
+    rename_column :users, :image, :image_file_name
+  end
+
+  def down
+    rename_column :users, :image_file_name, :image
+  end
+end