javascript - 使用 Express-Handlebars View 引擎在 Express 4.x 框架中呈现局部 View

Question

我正在尝试使用带有 express-handlebars 作为 View 引擎的 Express 框架创建一个 nodejs 应用程序，但在尝试查看主页时遇到以下错误:

错误:您必须将字符串或 Handlebars AST 传递给 Handlebars.compile。你传递了 [object Object]

谁能告诉我这里出了什么问题。

链接到 github 存储库:https://github.com/bdinesh/LearningNode.git

下面是我要运行的代码:

index.js

var express = require('express'),
    app = express(),
    hbs = require('express-handlebars'),
    // Create `ExpressHandlebars` instance with a default layout.
    hbsInstance = hbs.create({ 
        defaultLayout: 'main', extname: '.hbs'
    }),
    fortune = require('./lib/fortune.js'),
    weatherData = require('./lib/weather.js'); 

app.engine('hbs', hbsInstance.engine);
app.set('view engine', 'hbs');
app.set('port', process.env.PORT || 3000);
app.use(express.static(__dirname + '/public'));

app.use(function(req, res, next) {
    if (!res.locals.partials) {
        res.locals.partials = {};
    }

    res.locals.partials.weather = weatherData.getWeatherData();
    next();
});

app.get('/', function(req, res) {
    res.render('home');
});

app.listen(app.get('port'), function() {
    console.log('Express started on http://localhost:' + app.get('port'));
});

weather.js这个放在lib文件夹里

exports.getWeatherData = function getWeatherData() {
    return {
        locations: [
            {
                name: 'Portland',
                forecastUrl: 'http://www.wunderground.com/US/OR/Portland.html',
                iconUrl: 'http://icons-ak.wxug.com/i/c/k/cloudy.gif',
                weather: 'Overcast',
                temp: '54.1 F (12.3 C)',
            },
            {
                name: 'Bend',
                forecastUrl: 'http://www.wunderground.com/US/OR/Bend.html',
                iconUrl: 'http://icons-ak.wxug.com/i/c/k/partlycloudy.gif',
                weather: 'Partly Cloudy',
                temp: '55.0 F (12.8 C)',
            },
            {
                name: 'Manzanita',
                forecastUrl: 'http://www.wunderground.com/US/OR/Manzanita.html',
                iconUrl: 'http://icons-ak.wxug.com/i/c/k/rain.gif',
                weather: 'Light Rain',
                temp: '55.0 F (12.8 C)',
            },
        ],
    };
};

weather.hbs(局部 View )它位于 views/partials 文件夹中。

<div class="weatherWidget">
    {{#each partials.weather.locations}}
    <div class="location">
        <h3>{{name}}</h3>
        <a href="{{forecastUrl}}">
            <img src="{{iconUrl}}" alt="{{weather}}">
            {{weather}}, {{temp}}
        </a>
    </div>
    {{/each}}
    <small>Source: <a href="http://www.wunderground.com">Weather Underground</a></small>
</div>

home.hbs放在views文件夹中

<h1>Welcome to Meadowlark travel</h1>
{{> weather}}

Answer 1

请按如下方式更改您的代码:

<div class="weatherWidget">
{{#each partials.weatherData.locations}}
<div class="location">
    <h3>{{name}}</h3>
    <a href="{{forecastUrl}}">
        <img src="{{iconUrl}}" alt="{{weather}}">
        {{weather}}, {{temp}}
    </a>
</div>
{{/each}}
<small>Source: <a href="http://www.wunderground.com">Weather Underground</a></small>

不幸的是，令人惊叹的 Web Development with Node and Express 中有一些过时的部分和错误。

勘误请引用此处:http://www.oreilly.com/catalog/errata.csp?isbn=0636920032977 这里是你遇到的问题:https://github.com/EthanRBrown/web-development-with-node-and-express/issues/28