doc/technical/archived_migrations/20171108215005_add_eau_file_to_clef_tasks.rb
class AddEauFileToClefTasks < ActiveRecord::Migration[5.1]
def change
add_column :clef_tasks, :eua_file, :string
remove_column :challenges, :eua_file
remove_column :challenges, :challenge_datasets_id
add_reference :challenges, :clef_tasks
end
end