transferred Code Ocean from original repository to GitHub

db/migrate/20140918063522_add_hashed_content_to_files.rb

@@ -0,0 +1,11 @@
+class AddHashedContentToFiles < ActiveRecord::Migration
+  def change
+    add_column :files, :hashed_content, :string
+
+    reversible do |direction|
+      direction.up do
+        CodeOcean::File.all.each(&:save)
+      end
+    end
+  end
+end