node.js - ExpressJS View 中的变量

Question

我想让 session 变量(或任何其他变量)在 View 中可用，而无需再次重复。

我想出了这个:

  res.render('index', viewVariables(req, res, params, {});

以及viewVariables函数:

function viewVariables(req, res, params, options) {
  var returnObject = options || {locals:{}};
  var locals = {
    currentUser: req.currentUser ? req.currentUser : false
  };
  returnObject.locals = mergeObjects(locals, returnObject.locals, true);
  return returnObject;
};

这在最新的expressjs版本中不起作用(不同的渲染方法)。

是否有更简单或更优雅的解决方案？ (我确信有!)

Answer 1

你看过动态助手吗？

来自网站:

app.dynamicHelpers(obj)

Registers dynamic view helpers. Dynamic view helpers are simply functions which accept req, res, and are evaluated against the Server instance before a view is rendered. The return value of this function becomes the local variable it is associated with.

app.dynamicHelpers({
  session: function(req, res){
    return req.session;
  }
});

大多数时候我喜欢把它变成一个函数。这样，只有当您在 View 中调用该函数时才会调用它。