将Node JS变量传递给EJS模板
[英]Pass node js variable to ejs template
问题描述
I have a post request in node js file "index.js" 
我在节点js文件“ index.js”中有发布请求
this.app.post('/profile', (req, res) => {
let password = req.body.password;
let newWallet = operator.createWalletFromPassword(password);
let projectedWallet = projectWallet(newWallet);
res.render('profile.ejs', {
user : req.user,
});
console.log(JSON.stringify(projectedWallet));
});
And in profile.ejs to show for client see, I have: THIS IS FULL CODE THAT I JUST EDIT AS REQUESTED. 在profile.ejs中显示给客户看，我有：这是我按要求进行编辑的完整代码。
<html lang="en">
<head>
<title>Node Authentication</title>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css">
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css">
<style>
body { padding-top:80px; word-wrap:break-word; }
</style>
</head>
<br>
<%- include header %>
<div class="container">
<div class="page-header text-center">
<h1><span class="fa fa-anchor"></span> Profile Page</h1>
<a href="/logout" class="btn btn-default btn-sm">Logout</a>
<form action="/profile" method="get">
<button type="submit" class="btn btn-warning btn-lg" id="sub" >test</button>
</form>
</div>
<div class="row">
<!-- LOCAL INFORMATION -->
<div class="col-sm-6">
<div class="well">
<h3><span class="fa fa-user"></span> Local</h3>
<form action="/profile" method="post">
<p>
<strong>id</strong>: <%= user.id %><br>
<strong>username</strong>: <%= user.username %><br>
<strong>password</strong>: <%= user.password %>
</p>
<textarea id="myTextArea" cols=50 rows=10><%= data %>
</textarea>
<!-- these fields will be sent to server -->
<input type="hidden" name="username" value="<%= user.username %>">
<input type="hidden" name="password" value="<%= user.password %>">
<button type="submit" class="btn btn-warning btn-lg" id="sub" >Wallet</button>
</form>
</div>
</div>
</div>
</div>
<%- include footer %>
What I want is to put value of " projectedWallet " in post request to textarea in ejs file, but I don't know how to do that. 我想要的是在post请求中将“ projectedWallet ”的值放在ejs文件的textarea中，但是我不知道该怎么做。
3 个解决方案
解决方案1
1 2018-06-06 03:59:53
You will want to feed projectedWallet into the textarea through EJS like so: 您将希望通过EJS将projectedWallet馈送到textarea中，如下所示：
index.js index.js
this.app.post('/profile', (req, res) => {
let password = req.body.password;
let newWallet = operator.createWalletFromPassword(password);
let projectedWallet = projectWallet(newWallet);
res.render('profile.ejs', {
user : req.user,
// We are now feeding your EJS template another variable
projectedWallet : JSON.stringify(projectedWallet),
});
console.log(JSON.stringify(projectedWallet));
});
... and use it within the textarea inside your template ...并在模板的文本区域内使用它
profile.ejs profile.ejs
<form action="/profile" method="post">
<p>
<strong>id</strong>: <%= user.id %><br>
<strong>username</strong>: <%= user.username %><br>
<strong>password</strong>: <%= user.password %>
</p>
<textarea id="myTextArea" cols=50 rows=10>
<!-- We now populate the template with the sent variable -->
<%= projectedWallet %>
</textarea>
<!-- these fields will be sent to server -->
<input type="hidden" name="username" value="<%= user.username %>">
<input type="hidden" name="password" value="<%= user.password %>">
<button type="submit" class="btn btn-warning btn-lg">Wallet</button>
</form>
解决方案2
0 2018-06-06 06:50:36
you can save the variable in response's local variables and then use it at frontend side (EJs in this case). 您可以将变量保存在响应的局部变量中，然后在前端使用它（在这种情况下为EJ）。
updated code:: 更新的代码：：
index.js index.js
this.app.post('/profile', (req, res) => {
let password = req.body.password;
let newWallet = operator.createWalletFromPassword(password);
let projectedWallet = projectWallet(newWallet);
//added line
res.locals.projectedWallet = projectedWallet
res.render('profile.ejs', {
user : req.user,
});
console.log(JSON.stringify(projectedWallet));
});
profile.ejs profile.ejs
<form action="/profile" method="post">
<p>
<strong>id</strong>: <%= user.id %><br>
<strong>username</strong>: <%= user.username %><br>
<strong>password</strong>: <%= user.password %>
</p>
<!-- updated line -->
<textarea id="myTextArea" cols=50 rows=10><%=projectedWallet %>
</textarea>
<!-- these fields will be sent to server -->
<input type="hidden" name="username" value="<%= user.username %>">
<input type="hidden" name="password" value="<%= user.password %>">
<button type="submit" class="btn btn-warning btn-lg">Wallet</button>
</form>
解决方案3
0 2019-01-12 13:34:14
You need to check if the variable ( projectedWallet ) is defined, in the .get request you are not sending the projectedWallet as a parameter, so that's why you are getting the error 您需要检查是否定义了变量（ projectedWallet ），在.get请求中您没有将projectedWallet作为参数发送，因此这就是为什么出现错误的原因
<% if(typeof projectedWallet !== 'undefined') { %>
<p><%= projectedWallet %></p>
<% } %>
If you render a view multiple times sometimes with variables and others without, you need to add a condition and check if that variable exist for each render 如果多次渲染视图有时有时使用变量，而其他时候不使用变量，则需要添加条件并检查每个渲染是否存在该变量
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.