[英]Pass node js variable to ejs template
我在節點js文件“ index.js”中有發布請求
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));
});
在profile.ejs中顯示給客戶看，我有：這是我按要求進行編輯的完整代碼。
<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 %>
我想要的是在post請求中將“ projectedWallet ”的值放在ejs文件的textarea中，但是我不知道該怎么做。
您將希望通過EJS將projectedWallet饋送到textarea中，如下所示：
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));
});
...並在模板的文本區域內使用它
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>
您可以將變量保存在響應的局部變量中，然后在前端使用它（在這種情況下為EJ）。
更新的代碼：：
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
<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>
您需要檢查是否定義了變量（ projectedWallet ），在.get請求中您沒有將projectedWallet作為參數發送，因此這就是為什么出現錯誤的原因
<% if(typeof projectedWallet !== 'undefined') { %>
<p><%= projectedWallet %></p>
<% } %>
如果多次渲染視圖有時有時使用變量，而其他時候不使用變量，則需要添加條件並檢查每個渲染是否存在該變量
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