doc/technical/archived_migrations/20170501160042_remove_slugs.rb
class RemoveSlugs < ActiveRecord::Migration[5.0]
def change
remove_column :dataset_file_downloads, :slug, :string
remove_column :dataset_files, :slug, :string
remove_column :images, :slug, :string
remove_column :submission_files, :slug, :string
end
end