Question

类型错误：字符串不是一个函数？

2015-08-09

1692

javascript node.js mongodb

大家好，我是 Node js 的新手

我正在尝试运行以下代码

var express = require('express'),
    app = express(),
    cons = require('consolidate'); // Templating library adapter for Express

    app.engine('html', cons.swig);
    app.set('view engine', 'html');
    app.set('views', __dirname + '/views');

    app.get('/', function(req, res){
        res.render('hello', { name : 'World' });
    });

    app.get('*', function(req, res){
        res.send('Page Not Found', 404);
    });

    app.listen(8080);
    console.log('Express server started on port 8080');

然后出现错误

TypeError: string is not a function at EventEmitter.render (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\application.js:569:12) at ServerResponse.render (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\response.js:961:7) at C:\Users\YAm\Desktop\mongodb\work\test_coso.js:10:6 at Layer.handle [as handle_request] (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\layer.js:95:5) at next (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\route.js:131:13) at Route.dispatch (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\route.js:112:3) at Layer.handle [as handle_request] (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\layer.js:95:5) at C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:277:22 at Function.process_params (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:330:12) at next (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:271:10) at expressInit (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\middleware\init.js:33:5) at Layer.handle [as handle_request] (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:312:13) at C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:330:12) at next (C:\Users\YAm\Desktop\mongodb\work\node_modules\express\lib\router\index.js:271:10)

Answer 1

只需查看 express res.render() 的文档。我认为您的语法有问题。

// send the rendered view to the client
res.render('index');

// if a callback is specified, the rendered HTML string has to be sent explicitly
res.render('index', function(err, html) {
  res.send(html);
});

// pass a local variable to the view
res.render('user', { name: 'Tobi' }, function(err, html) {
  // ...
});

Answer 2

代码没有任何问题，对我来说运行良好

执行以下操作来调试问题

检查 views 文件夹中的 hello.html 文件，删除所有 html 代码，然后尝试放入一些简单的“Hello Word”
创建一个新文件夹并复制粘贴 js 脚本和 views 文件夹，然后尝试 npm install express、consolidate 和 swig
检查节点版本 v5.5.0，它运行良好，没有任何问题