halting_and_conditional

# File activesupport/lib/active_support/callbacks.rb, line 172
          def self.halting_and_conditional(callback_sequence, user_callback, user_conditions, halted_lambda, filter)
            callback_sequence.before do |env|
              target = env.target
              value  = env.value
              halted = env.halted

              if !halted && user_conditions.all? { |c| c.call(target, value) }
                result_lambda = -> { user_callback.call target, value }
                env.halted = halted_lambda.call(target, result_lambda)
                if env.halted
                  target.send :halted_callback_hook, filter
                end
              end

              env
            end
          end