TypeError : User.findById가 deserializeUser의 함수가 아닙니다.

Question

저는 passport auth (로컬 및 Google 전략)로 작업 중이며 "deserializeUser"함수에서 "User.findById가 함수가 아닙니다"라고 알려줍니다.

passport.js

const passport = require('passport'); 
const request = require('request'); 
const LocalStrategy = require('passport-local').Strategy; 
const GoogleStrategy = require('passport-google-oauth'). 

const OAuthStrategy = require('passport-oauth').OAuthStrategy; 
const OAuth2Strategy = require('passport-oauth').OAuth2Strategy; 

const User = require('../routes/user'); 

passport.serializeUser((user, done) => { 
    done(null, user.id); 
}); 

passport.deserializeUser(function(id, done) { 
    User.findById(id, function(err, user) { 
     done(err, user); 
    }); 
}); 

/** 
* Sign in using Email and Password. 
*/ 
passport.use(new LocalStrategy({ usernameField: 'email' }, (email, password, done) => { 
    User.findOne({ email: email.toLowerCase() }, (err, user) => { 
     if (err) { return done(err); } 
     if (!user) { 
      return done(null, false, { msg: `Email ${email} not found.` }); 
     } 
     user.comparePassword(password, (err, isMatch) => { 
      if (err) { return done(err); } 
      if (isMatch) { 
       return done(null, user); 
      } 
      return done(null, false, { msg: 'Invalid email or password.' }); 
     }); 
    }); 
})); 

/** 
* OAuth Strategy Overview 
* 
* - User is already logged in. 
* - Check if there is an existing account with a provider id. 
*  - If there is, return an error message. (Account merging not supported) 
*  - Else link new OAuth account with currently logged-in user. 
* - User is not logged in. 
* - Check if it's a returning user. 
*  - If returning user, sign in and we are done. 
*  - Else check if there is an existing account with user's email. 
*  - If there is, return an error message. 
*  - Else create a new account. 
*/ 


/** 
* Sign in with Google. 
*/ 
passport.use(new GoogleStrategy({ 
    clientID: process.env.GOOGLE_ID, 
    clientSecret: process.env.GOOGLE_SECRET, 
    callbackURL: '/auth/google/callback', 
    passReqToCallback: true 
}, (req, accessToken, refreshToken, profile, done) => { 
    if (req.user) { 
     User.findOne({ google: profile.id }, (err, existingUser) => { 
      if (err) { return done(err); } 
      if (existingUser) { 
       req.flash('errors', { msg: 'There is already a Google account that belongs to you. Sign in with that account or delete it' }); 
       done(err); 
      } else { 
       User.findById(req.user.id, (err, user) => { 
        if (err) { return done(err); } 
        user.google = profile.id; 
        user.tokens.push({ kind: 'google', accessToken }); 
        user.profile.name = user.profile.name || profile.displayName; 
        user.profile.gender = user.profile.gender || profile._json.gender; 
        user.profile.picture = user.profile.picture || profile._json.image.url; 
        user.save((err) => { 
         req.flash('info', { msg: 'Google account has been linked.' }); 
         done(err, user); 
        }); 
       }); 
      } 
     }); 
    } else { 
     User.findOne({ google: profile.id }, (err, existingUser) => { 
      if (err) { return done(err); } 
      if (existingUser) { 
       return done(null, existingUser); 
      } 
      User.findOne({ email: profile.emails[0].value }, (err, existingEmailUser) => { 
       if (err) { return done(err); } 
       if (existingEmailUser) { 
        req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with Google manually from Account Settings.' }); 
        done(err); 
       } else { 
        const user = new User(); 
        user.email = profile.emails[0].value; 
        user.google = profile.id; 
        user.tokens.push({ kind: 'google', accessToken }); 
        user.profile.name = profile.displayName; 
        user.profile.gender = profile._json.gender; 
        user.profile.picture = profile._json.image.url; 
        user.save((err) => { 
         done(err, user); 
        }); 
       } 
      }); 
     }); 
    } 
})); 

exports.isAuthenticated = (req, res, next) => { 
    if (req.isAuthenticated()) { 
     return next(); 
    } 
    res.redirect('/login'); 
}; 

/** 
* Authorization Required middleware. 
*/ 
exports.isAuthorized = (req, res, next) => { 
    const provider = req.path.split('/').slice(-1)[0]; 
    const token = req.user.tokens.find(token => token.kind === provider); 
    if (token) { 
     next(); 
    } else { 
     res.redirect(`/auth/${provider}`); 
    } 
}; 

내가 다른 디렉토리 아무것도에 붙여 넣기를 복사하기 전에이 작업을했다.

Answer 1

그래서 구조상 문제가 발견되어 수정되었습니다.