node.js - Webpack bundling doesn't include specific module such as 'sequelize' -

i'm developing nodejs webpack, seqelize , other modules below webpack configuration.

const path = require('path'); const webpack = require('webpack'); const fs = require('fs'); const glob = require('glob'); const cleanwebpackplugin = require('clean-webpack-plugin');  var nodemodules = {}; fs.readdirsync('node_modules')     .filter(function(x) {     return ['.bin'].indexof(x) === -1;   })   .foreach(function(mod) {     nodemodules[mod] = 'commonjs ' + mod;   });  module.exports = {   // entry: [ path.resolve(__dirname, 'server.js'), models ],   entry: glob.sync(path.resolve(__dirname, 'src/**/*.js')),   resolve: {     // add `.ts` , `.tsx` resolvable extension.     root      : [path.resolve(__dirname, '')],     extensions: ['', '.webpack.js', '.web.js', '.ts', '.tsx', '.js'],     modulesdirectories: ['node_modules']   },   module: {     loaders: [       {         test: /\.js$/,         loader: 'babel',         exclude: /node_modules/,         query: {           cachedirectory: true,           presets: ['es2015']         }       }, {         test: /\.json$/,         loader: 'json'       }     ]   },   plugins: [     new cleanwebpackplugin(['build'], {       root: path.resolve(__dirname, ''),       verbose: true,       dry: false,       exclude: [],       watch: true     })   ],   node: {     __filename: true,     __dirname: true   },   target: 'node',   externals: nodemodules,   output: {     path: path.resolve(__dirname, 'build'),     filename: 'server.[chunkhash].js',     librarytarget: 'commonjs'   } } 

in case, try bundle whole sources config , bundled file named server.[chunkhash].js.

i want move file server , make work command node server.[chuckhash].js, however, got message below.

module.js:472     throw err;     ^  error: cannot find module 'sequelize'     @ function.module._resolvefilename (module.js:470:15)     @ function.module._load (module.js:418:25)     @ module.require (module.js:498:17)     @ require (internal/module.js:20:19)     ... 

so, tried find specific point make error, , found out models/index.js use seqelize module below codes.

import fs 'fs'; import path 'path'; import sequelize 'sequelize'; import config 'config/env';  const sequalize = new sequelize(config.mysql.database, config.mysql.username, config.mysql.password, config.mysql.params.options); const db = {};  fs.readdirsync(__dirname)   .filter(file => {     return (file.indexof('.') !== 0) && (file !== 'index.js');   })   .foreach(file => {     const model = sequalize.import(path.resolve(__dirname, file));     db[model.name] = model;   });  object.keys(db).foreach(modelname => {   if ('associate' in db[modelname]) {     db[modelname].associate(db);   } });  db.sequelize = sequalize; db.sequelize = sequelize;  export default db; 

how fix issue?

actually, nodemodule in same folder, there has been no error, but, make bundled file, make error.

you defined node_modules externals (externals: nodemodules,). means webpack won't bundle module comes node_modules , leave imports resolved @ runtime, when running in node without using webpack. work need have modules available wherever run bundle.

if want webpack bundle node_modules well, can remove externals option.

the externals config you're using came (directly or indirectly) backend apps webpack (part i) , should read blog post understand it's doing , whether need it.