1 class AddUserImageFingerprint < ActiveRecord::Migration[4.2]
2 class User < ActiveRecord::Base
6 add_column :users, :image_fingerprint, :string, :null => true
8 User.where("image_file_name IS NOT NULL").find_each do |user|
11 user.image_fingerprint = image.generate_fingerprint(image)
17 remove_column :users, :image_fingerprint