instance method check_protected_environments!

# File activerecord/lib/active_record/tasks/database_tasks.rb, line 63
      def check_protected_environments!
        unless ENV["DISABLE_DATABASE_ENVIRONMENT_CHECK"]
          current = ActiveRecord::Base.connection.migration_context.current_environment
          stored  = ActiveRecord::Base.connection.migration_context.last_stored_environment

          if ActiveRecord::Base.connection.migration_context.protected_environment?
            raise ActiveRecord::ProtectedEnvironmentError.new(stored)
          end

          if stored && stored != current
            raise ActiveRecord::EnvironmentMismatchError.new(current: current, stored: stored)
          end
        end
      rescue ActiveRecord::NoDatabaseError
      end