route.js

var model = {
  name: 'product',
  route: [ middleware1, middleware2 ]
};

var model2 = {
  name: 'page'
};

function middleware(req, res, next) {

  if (model.route) {
    return walkSubstack(model.route, req, res, next);
  }

  res.render(model.name);

}

walker.js

var walkSubStack = function (stack, req, res, next) {

  if (typeof stack === 'function') {
    stack = [stack];
  }

  var walkStack = function (i, err) {

    if (err) {
      return next(err);
    }

    if (i >= stack.length) {
      return next();
    }

    stack[i](req, res, walkStack.bind(null, i + 1));

  };

  walkStack(0);

};