NodeJS检索JSON并投放到EJS模板 [英] NodeJS retrieve JSON and serve to EJS template
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问题描述
我的目的是获取JSON并将其提供给EJS文件.
my purpose is to get a JSON and serve it to an EJS file.
这是我的代码:
//server.js
users = require('./controllers/users.js');
global.app_root = path.resolve(__dirname);
app.get('/users', function(req, res) {
res.render('partials/users', {
data: users.retrieve_users
});
})
//users.js
var fs = require("fs");
exports.retrieve_users = function (req, res) {
fs.readFile(app_root + "/config/" + "users-list.json", 'utf8', function (err, data) {
res.end(data);
});
}
//users.ejs
<body>
<%= data %>
</body>
但是作为该代码在体内的输出，我从字面上看到了这个字符串:
But as output of this code inside the body I see literally this string:
'function (req, res) {
fs.readFile(app_root + "/config/" + "users-list.json", 'utf8', function (err, data) {
res.end(data);
});
}'
推荐答案
问题是您的数据即将异步，您无需等待渲染就可以了.实际上，现在您甚至都没有运行 users.retrieve_users 函数，您只需取回函数声明并将express呈现为字符串即可！将您的代码更改为此.
The problem is that your data is coming asynchronous and you don't wait for them before the rendering. In fact right now you dont even run the users.retrieve_users function, you just getting back the function declaration and express renders it as string! Change your code to this.
//server.js
users = require('./controllers/users.js');
global.app_root = path.resolve(__dirname);
app.get('/users', function(req, res) {
//a method that get thr user-list data and renders it
users.retrieve_users()
.then(function(users){
res.render('partials/users', {
data: users
});
})
.catch(function(err){
res.status(500).send({ error: 'something blew up' });
})
})
//users.js
var fs = require("fs");
exports.retrieve_users = function () {
//function that returns user-list in promise
return new Promise(function(resolve,reject){
fs.readFile(app_root + "/config/" + "users-list.json", 'utf8', function (err, data) {
if(err) return reject(err)
resolve(data);
});
})
}
//users.ejs
<body>
<%= data %>
</body>这篇关于NodeJS检索JSON并投放到EJS模板的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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