doc/technical/archived_migrations/20170306164912_add_options_json_to_emails.rb
class AddOptionsJsonToEmails < ActiveRecord::Migration[5.0]
def change
add_column :emails, :options_json, :jsonb
emails = Email.all
emails.each do |e|
e.options_json = eval(e.options).deep_stringify_keys
e.save
end
end
end