未定义模块名称 - node js

Posted 2023-03-25

【中文标题】未定义模块名称 - node js

【英文标题】：Module name is not defined - node js

【发布时间】：2015-08-09 12:48:51

【问题描述】：

我正在尝试让“async”模块（not async/await）在 nodejs 上运行，但出现以下错误：

ReferenceError: 未定义异步 在 D:\project\routes\index.js:58:2 在 Layer.handle [as handle_request] (D:\project\node_modules\express\lib\router\layer.js:82:5) 在下一个 (D:\project\node_modules\express\lib\router\route.js:110:13) 在 Route.dispatch (D:\project\node_modules\express\lib\router\route.js:91:3) 在 Layer.handle [as handle_request] (D:\project\node_modules\express\lib\router\layer.js:82:5) 在 D:\project\node_modules\express\lib\router\index.js:267:22 在 Function.proto.process_params (D:\project\node_modules\express\lib\router\index.js:321:12) 在下一个 (D:\project\node_modules\express\lib\router\index.js:261:10) 在 Function.proto.handle (D:\project\node_modules\express\lib\router\index.js:166:3) 在路由器 (D:\project\node_modules\express\lib\router\index.js:35:12)

在server.js 文件中我添加了：var async = require('async'); 我使用 async.series 的代码：

/* POST to Add User Service */
router.post('/register', function(req, res)     
var error = false;
var errors = [];

// Set our internal DB variable
var db = req.db;

// Get our form values. These rely on the "name" attributes
var user_email = req.body.useremail;
var user_password = req.body.userpassword;
var user_repeat_password = req.body.repeatpassword;

var encrypted_password;
var ip;

async.series([
    function(callback)
        // Check if entered passwords matches
        if(user_password !== user_repeat_password)
            error = true;
            errors.push('Password does not match');
        
        if(user_password.length < 6)
            error = true;
            errors.push('Password to short, must be minimal 6 characters long');
        
        callback();
    ,
    function(callback)
        // Encrypt password
        var salt = "test";
        var salt2 = "test2";
        encrypted_password = SHA512(SHA512(SHA512(salt.concat(user_password,salt2))));

        // Get IP
        ip = req.ip;
        if(ip=="")
            error = true;
            errors.push('No IP found?');
        

        // Validate email
        function validateEmail(user_email) 
            var re = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]0,66)\.([a-z]2,6(?:\.[a-z]2)?)$/i;
            return re.test(user_email);
        
        if (!validateEmail(user_email)) 
            error = true;
            errors.push('Unvalid email');
        
        else
            // Check if email already exists
            var collection = db.get('users');
            collection.find('email':user_email, function(err, items)
                if(items == "")
                    console.log('Email available');
                
                else
                    error = true;
                    errors.push('Email already in use');
                    console.log('Email UNavailable');
                
            , function (err, doc) 
                // If it failed, return error
                res.send("An error occurred while processing the data, please contact the site administrator.");
            );
        
        callback();
    
], function(err)

    console.log(error);

    // Check if errors
    if(error == true)
        console.log('error = true');
        errors.push("<a href='/register'>Try Again</a>");
        var error_string = errors.join("<br>");
        res.send(error_string);
    
    else
        console.log('error = false');

        // Set our collection
        var collection = db.get('users');

        // Submit to the DB
        collection.insert(
            "email" : user_email,
            "password" : encrypted_password,
            "status" : false,
            "ip" : ip
        , function (err, doc) 
            if (err) 
                // If it failed, return error
                res.send("An error occurred while processing the data, please contact the site administrator.");
            
            else 
                // If it worked, set the header so the address bar doesn't still say /adduser
                res.location("userlist");
                // And forward to success page
                res.redirect("userlist");
            
        );
    
);
);

【问题讨论】：

这段代码是否在同一个文件中，server.js？

需要你使用它的模块。

不，它在 index.js 文件中。 server.js 需要的： var routes = require('./routes/index');

【参考方案1】：

您需要在将要使用它的同一文件中要求 Async 模块。

var async = require('async');

async.series(...