在expressjs渲染中消除布局局部变量

发布于 2024-10-14 20:55:44 字数 477 浏览 5 评论 0原文

我在nodejs中使用express，并试图保持我的视图渲染干燥。在我的布局中，我有类似以下内容的内容（我正在使用玉）

body
  nav.login
    -if(currentUser)
      ="logged in information"
    -else
      ="logged out information"
  !=body

问题是每次渲染时，我现在都需要执行

res.render('anything.jade',{
  locals: {
    currentUser: req.session.currentUser,
    /*all of my other locals*/
  }
});

所有渲染调用并添加似乎很痛苦然后，如果我必须向布局添加任何其他本地变量，则执行相同的操作。有没有什么方法可以避免在我渲染的每个地方重新输入“currentUser”

原文

I am using express in nodejs, and am trying to keep my view rendering dry. Inside my layout, I have something like the following (I'm using jade)

body
  nav.login
    -if(currentUser)
      ="logged in information"
    -else
      ="logged out information"
  !=body

The problem is that every time I render, I'm now required to have

res.render('anything.jade',{
  locals: {
    currentUser: req.session.currentUser,
    /*all of my other locals*/
  }
});

It seems like a pain to have to go through all of my rendering calls and add that, and then do the same thing if I have to add any other locals to the layout. Is there some way to keep from having to retype 'currentUser' into the locals everywhere I render

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忆梦 2024-10-21 20:55:44

我知道这个答案已经晚了，但对于后代来说：如果您使用的是express，则应该使用提供的动态助手，它们是可查看的辅助函数，以 req,res 作为参数。在您的情况下：

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

这意味着您的视图现在可以调用 #{user}

I know this answer is late, but for posterity: if you're using express, you should use the supplied dynamic helpers, which are view-accessible helper functions which take req,res as arguments. In your case:

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

Which means your view could now call #{user}

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望她远 2024-10-21 20:55:44

我最终做了以下事情：

首先，我设置了一些局部变量

app.use(function(req,res,next){
  req.localvars = new Object;
  next();
});

，稍后，我设置了一些局部变量，

app.use(function(req,res,next){
  req.localvars.currentUser = req.session.currentUser;
  next();
});

我设置了渲染函数，

function renderer(file){  
  return function(req,res,next){
    res.render(file,{locals:req.localvars});
  }
}

然后为路由函数

app.get('/',blah,blah,whatever,setSomeMoreLocalsHere,renderer(index.jade));

设置了可能有更好的东西，但这是我找到的最佳解决方案，所以远的

I ended up doing the following:

first, I set up some local variables

app.use(function(req,res,next){
  req.localvars = new Object;
  next();
});

later, I set some local variables

app.use(function(req,res,next){
  req.localvars.currentUser = req.session.currentUser;
  next();
});

I set up a render function

function renderer(file){  
  return function(req,res,next){
    res.render(file,{locals:req.localvars});
  }
}

then for the routing function

app.get('/',blah,blah,whatever,setSomeMoreLocalsHere,renderer(index.jade));

There might be something better, but it's the best solution I've figured out so far

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云醉月微眠 2024-10-21 20:55:44

最简单的解决方案是使用返回局部对象的函数。

function(req) {
    return {
        currentUser: req.session.currentUser,
        /*all of my other locals*/
    };
}

res.render('anything.jade',{
  locals: defaultLocals(req)
});

The easiest solution would be to use a function that returns a locals object.

function(req) {
    return {
        currentUser: req.session.currentUser,
        /*all of my other locals*/
    };
}

res.render('anything.jade',{
  locals: defaultLocals(req)
});

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