我使用 EJS 作为我的模板引擎。我的浏览器说“用户”未定义，但在我的 server.js 文件中，我将其定义为
var users = require("./routes/userws)ReferenceError: C:\Users\Corfi\Google Drive\Coding\webdev\site\views\index.ejs:27
25| <h1>hello</h1>
26| <ul>
>> 27| <% users.forEach(function(user) { %>
28| <li><%= user.first_name + " " + user.last_name %> - <a data-id="<%= user._id%>" class= "deleteUser" href="#">Delete</a></li>
29| <% })%>
30| </ul>
users is not defined
at eval (eval at compile (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\ejs\lib\ejs.js:549:12), <anonymous>:37:8)
at returnedFn (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\ejs\lib\ejs.js:580:17)
at tryHandleCache (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\ejs\lib\ejs.js:223:34)
at View.exports.renderFile [as engine] (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\ejs\lib\ejs.js:437:10)
at View.render (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\view.js:127:8)
at tryRender (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\application.js:640:10)
at EventEmitter.render (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\application.js:592:3)
at ServerResponse.render (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\response.js:971:7)
at C:\Users\Corfi\Google Drive\Coding\webdev\site\routes\index.js:6:9
at Layer.handle [as handle_request] (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\route.js:137:13)
at Route.dispatch (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:281:22
at Function.process_params (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:335:12)
at next (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:275:10)
at Function.handle (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:174:3)
at router (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:47:12)
at Layer.handle [as handle_request] (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:317:13)
at C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:284:7
at Function.process_params (C:\Users\Corfi\Google Drive\Coding\webdev\site\node_modules\express\lib\router\index.js:335:12).
我的server.js文件如下：
//Declare which modules are required
var express = require("express");
var cookieParser = require("cookie-parser");
var flash = require("connect-flash");
var session = require("express-session");
var passport = require("passport");
var LocalStrategy = require("passport-local").Strategy;
var bodyParser = require("body-parser");
var path = require("path");
var expressValidator = require("express-validator");
//MongoDB
var mongo = require("mongo");
//MongoDb - Mongojs
var mongojs = require("mongojs");
var db = mongojs("bank", ["users"])
var ObjectId = mongojs.ObjectId
//MongoDB - Mongoose
var mongoose = require("mongoose")
var mongooseConnect = mongoose.connect('mongodb://localhost/bank', {
useMongoClient: true,
});
//Routes
var routes = require("./routes/index");
var users = require("./routes/users");
//Express server
var server = express();
//Avoid errors
server.disable("x-powered-by");
//View Engine
server.set("view engine", "ejs");
server.set("views", path.join(__dirname, "views"));
//Body Parser Middleware
server.use(bodyParser.json());
server.use(bodyParser.urlencoded({extended: false}));
//Express Session Middleware
server.use(session({
secret: "secret",
saveUninitialized: true,
resave: true
}))
//Passport Setup
server.use(passport.initialize());
server.use(passport.session());
//Express-Validator Middleware
server.use(expressValidator({
errorFormatter: function(param, msg, value) {
var namespace = param.split('.')
, root = namespace.shift()
, formParam = root;
while(namespace.length) {
formParam += '[' + namespace.shift() + ']';
}
return {
param : formParam,
msg : msg,
value : value
};
}
}));
//Connect Flash Middleware
server.use(flash());
// Global Vars
server.use(function(req, res, next) {
res.locals.errors = null;
//Global vars - Connect Flash
res.locals.success_msg = req.flash("success_msg");
res.locals.error = req.flash("error");
next();
})
//Set up static path; set up delivery of CSS and client-side JavaScript
server.use(express.static(path.join(__dirname, 'public')));
// Mongojs: - Find everything
db.users.find(function (err, docs) {
console.log(docs);
//Routing
server.get("/", function(req, res) {
res.render("index", {
title: "Customers",
users: docs
});
})
})
//Routing Middleware
server.use("/", routes);
server.use("/users", users)
//Form validation
server.post("/users/add", function(req, res) {
req.checkBody("first_name", "First Name is Required").notEmpty();
req.checkBody("last_name", "Last Name is Required").notEmpty();
req.checkBody("email", "Email is Required").notEmpty();
//Get errors
var errors = req.validationErrors();
//If there are any errors --> returns truthy value
if (errors) {
//Render index page with applicable error messages
res.render("index", {
title: "Customers",
users: users,
errors: errors
});
}
//If there are no errors --> Request first name, last name, and email adress, and log them in console.
else {
var newUser = {
first_name: req.body.first_name,
last_name: req.body.last_name,
email: req.body.email
}};
//When form is submitted, log erros if there are any,
//and create a new user if there aren't any errors.
db.users.insert(newUser, function(err, result) {
if(err) {
console.log(err);
}
else {
res.redirect("/");
}
})
}
)
//End form validation
//Set up user delete functionality
server.delete("/users/delete/:id", function(req, res) {
db.users.remove(
{
_id: ObjectId(req.params.id)
}, function(err, result) {
if(err){
console.log(err);};
res.redirect("/");})
})
;
//Set Port
var port = 5000
server.set("port", process.env.PORT || 5000);
server.listen(port, function() {
console.log("Server started on Port" + " " +port)
})
Index.ejs 文件：
<% include partials/header %>
<h1>Add Customer</h1>
<% if(errors) {%>
<ul>
<%errors.forEach(function(error) { %>
<li><%= error.msg %></li>
<% })%>
</ul>
<% } %>
<form method = "POST" action="/users/add">
<label>First Name</label> <br>
<input type="text" name="first_name">
<br>
<label>Last Name</label> <br>
<input type="text" name="last_name">
<br>
<label>E-mail</label> <br>
<input type="email" name="email">
<br><br>
<input type="submit" value="Submit">
</form>
<div id="testjs">
Hello there
</div>
<h1>hello</h1>
<ul>
<% users.forEach(function(user) { %>
<li><%= user.first_name + " " + user.last_name %> - <a data-id="<%= user._id%>" class= "deleteUser" href="#">Delete</a></li>
<% })%>
</ul>
<% include partials/footer %>
我认为我没有更多相关细节需要添加，但 Stackoverflow 坚持要求我添加更多细节，所以我真的不知道要在这里输入什么，等等，等等
你没有在调用你的index.ejs的路由中定义和传递
users/routes/index在 res.render 中，如果您希望能够在模板/视图中访问它，则需要传递
usersapp.get('/', function (req, res) {
res.render('index', { users: '[usersList]'});
});
只有从路由传递到
res.renderOlha，eu também acabo de ter esse mesmo Problema ainda a alguns minutos, mais vocês são foda e vi aqui esse exemplo and lembrei que o erro estava sendo mesmo mesmo em não informar essa variavel