인프런 커뮤니티 질문&답변

아래와 같은 오류가 발생됩니다....

Error: Cannot find module 'bcrypt'

Require stack:

- /Users/sungwon/Desktop/Project/Web/company_website/backend/routes/user.js

- /Users/sungwon/Desktop/Project/Web/company_website/backend/index.js

at Module._resolveFilename (node:internal/modules/cjs/loader:1369:15)

at defaultResolveImpl (node:internal/modules/cjs/loader:1025:19)

at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1030:22)

at Module._load (node:internal/modules/cjs/loader:1179:37)

at TracingChannel.traceSync (node:diagnostics_channel:322:14)

at wrapModuleLoad (node:internal/modules/cjs/loader:235:24)

at Module.require (node:internal/modules/cjs/loader:1449:12)

at require (node:internal/modules/helpers:135:16)

at Object.<anonymous> (/Users/sungwon/Desktop/Project/Web/company_website/backend/routes/user.js:3:16)

at Module._compile (node:internal/modules/cjs/loader:1692:14) {

code: 'MODULE_NOT_FOUND',

requireStack: [

'/Users/sungwon/Desktop/Project/Web/company_website/backend/routes/user.js',

'/Users/sungwon/Desktop/Project/Web/company_website/backend/index.js'

]

}

Node.js v24.4.0

[nodemon] app crashed - waiting for file changes before starting...

아래는 index.js 코드입니다.

require('dotenv').config();
const express = require('express');
const mongoose = require('mongoose');
const app = express();
const PORT =3000;

const userRoutes = require("./routes/user");
app.use('/api/auth',userRoutes);

app.get('/', (req, res) => {
    res.send('Hello World!');
});

mongoose.connect(process.env.MONGO_URI)
.then(() => console.log('MongoDB와 연결이 되었습니다.'))
.catch((error)=> console.log('MongoDB와 연결이 실패하였습니다:',error));

app.listen(PORT, () => {
    console.log("Server is running");
    })

models>User.js 코드입니다.

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema(
    {
        username:{
            type:String,
            require: true,
            trim: true,
            minlength:2,
            maxlength:30,
        },
        password:{
            type:String,
            require:true,
            select: false,
        },
        isLoggedIn:{
            type:Boolean,
            default:false,
        },
        isActive:{
            type:Boolean,
            default:false,
        },
        failedLoginAttempts:{
            type:Number,
            default:0,
        },
        lastLoginAttempts:{
            type:Date,
        },
        ipAddress:{
            type:String,
            trim:true,
        },
        createdAt:{
            type:Date,
            default: Date.now,
        }
    },
    {
        timestamps:true,

    }
);
const User = mongoose.model('User', userSchema);

module.exports = User;

routes>user.js코드 입니다.

const express = require('express');
const router = express.Router();
const bcrypt = require('bcrypt');
const User = require('../models/User');

router.post('/signup', async (req, res) => {
    try {
        const {username, password} = req.body;
        const existingUser=await User.findOne({username});
        if(existingUser){
            return res.status(400).json({message:'이미 존재하는 사용자 입니다.'});
        }
        const hashedPassword = await bcrypt.hash(password,10);

        const user = new User({
            username,
            password:hashedPassword,
        })
        await user.save();
        res.status(201).json({message:'회원가입이 완료되었습니다.'});
    } catch(error){
        res.status(500).json({message:'서버 오류가 발생되었습니다.'});
        console.log(error);
    }
});

module.exports = router;