db/migrate/20171112062507_replace_foreign_keys.rb
class ReplaceForeignKeys < ActiveRecord::Migration
def change
remove_foreign_key :users, :amenity_lists
add_foreign_key :users, :amenity_lists, on_delete: :cascade
remove_foreign_key :amenity_lists, :users
add_foreign_key :amenity_lists, :users, on_delete: :cascade
end
end