TypeError: Class constructor model cannot be invoked without 'new' after uninstalling babel

[ekkatharisi]

Bug Report

Current Behavior
i have a trouble using babel , and when i unistalling it to use just the ES5 , it shoots this error :
TypeError: Class constructor model cannot be invoked without 'new'
this is my code :
Input Code

        const fs = require('fs');
        const path = require('path'); 
        const Sequelize = require('sequelize');
        const basename = path.basename(__filename);
        const env = 'development';
        const config = require('../config/config')[env];

           const sequelize  = new Sequelize(config.database.database_name, config.database.username, 
           config.database.password, config.database.database_config);

      var db = {
         sequelize : sequelize,
         Sequelize : Sequelize
      };

        db.sequelize.authenticate().then(() => {
        console.log('database worked !!!');


    fs.readdirSync(path.join(__dirname,'models/')).filter(file => {
        return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
    }).forEach(file => {
        var model = db.sequelize.import(path.join(__dirname,"models/", file));
        //var model = require(path.join(__dirname,"models/", file))(sequelize, Sequelize);
        db[model.name] = model;
    });

       Object.keys(db).forEach(modelName => {
           if (db[modelName].associate) {
               db[modelName].associate(db);
          }
         } );
       db.sequelize.sync({force : true}).then(res => {
           console.log('database created !!!!!!!!!');
      }).catch(err => {
           console.log(err.stack);
     })
        }).catch(error => {
            console.log(error.stack);
       });
       module.exports = db;

please what i should do now ??

Environment

• Babel version(s): [e.g. v6.0.0, v7.0.0-beta.34]
• Node/npm version: [e.g. Node 10.14.2/npm 6.4.1]
• OS: [Windows 10]
• How you are using Babel: [cli]

[babel-bot]

Hey @ekkatharisi! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
community that typically always has someone willing to help. You can sign-up here
for an invite.

[nicolo-ribaudo]

Which lines doe throw that error?
Also, I'm not sure that I understood the question: your code works when if you use Babel but doesn't work without Babel?

[ekkatharisi]

thank you @nicolo-ribaudo for responding me, so the problem that i install BABEL in my laptop (and other pc), after that the console shoots this error in this line
var model = db.sequelize.import(path.join(__dirname,"models/", file));
after , i remove BABEL by this comande :
npm uninstall babel-cli babel-preset-es2015 babel-preset-env
npm uninstall -g babel-cli babel-preset-es2015 babel-preset-env
but the error still the same, what I want is to execute the code fine without this error.
NOTE 1: the error occurs when I use this command
node connect.js
NOTE 2: I use node version 10.13.0.
the whole project is in this repo
thank you in advance.

[nicolo-ribaudo]

Maybe you can find a solution at sequelize/sequelize#7840.

Another possible solution is to transpile the sequelize module to es5.
Btw, I suggest you to use Babel 7 instead of Babel 6.

[ekkatharisi]

but the sequelize modules are transpiled to es5, (have you see any es6 expression )
and no as i say i remove conmpletely BABEL , but the error still the same .
and thank you @nicolo-ribaudo for reference but i don't find the solution yet.

[TidyIQ]

I'm experiencing the same issue although as far as I'm aware it only occurs when I AM using babel (if I remove babel then none of my imports work so I can't run my app to check).

It's also occurring for me at sequelize.import()

edit: nope, it was also not working without babel. I believe it's an issue with sequelize. I switched to the sequelize-typescript package so I don't need to use sequelize.import() anymore and now my app works fine.

[nicolo-ribaudo]

If this was a Babel bug, it has been fixed by #8656