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Cant export multiple Sequelize Models from single file

I have 3 sequelize models that i have defined imported into a file called sequelize.js like so:
const { Sequelize } = require("sequelize");
const UserModel = require("./models/user");
const ItemModel = require("./models/item");
const ReservationModel = require("./models/reservation");
const config = require("./dbconfig");
const db = config.database;
const Item = ItemModel(sequelize, Sequelize);
const User = UserModel(sequelize, Sequelize);
const Reservation = ReservationModel(sequelize, Sequelize);
Reservation.hasMany(Item);
Item.belongsTo(Reservation);
Reservation.belongsTo(User);
I then try to export them:
module.exports = { Item, User, Reservation };
However, when I try to access one of them and use a model function, I get an error.
const Model = require("../../sequelize");
const passport = require("passport");
module.exports = (app) => {
app.post("/registerUser", (req, res, next) => {
passport.authenticate("register", (err, user, info) => {
if (err) {
console.log(err);
}
if (info !== undefined) {
console.log(info.message);
res.send(info.message);
} else {
req.logIn(user, (err) => {
const data = {
first_name: req.body.first_name,
last_name: req.body.last_name,
email: req.body.email,
username: user.email,
};
Model.User.findOne({
where: {
email: data.username,
},
}).then((user) => {
user
.update({
first_name: data.first_name,
last_name: data.last_name,
email: data.email,
})
.then(() => {
console.log("user created in db");
res.status(200).send({ message: "user created" });
});
});
});
}
})(req, res, next);
});
};
results in
TypeError: User.findOne is not a function
This is not an issue when I just export one of them.
module.exports = User;
const User = require("./sequelize");
...
User.findOne(...) //works
I've tried multiple ways of exporting, but none seem to work.
e.g
module.exports = {
Item: Item,
User: User,
Reservation: Reservation,
}
and
exports.Item = Item;
exports.User = User;
exports.Reservation = Reservation;
edit: Here is my user model for reference
module.exports = (sequelize, type) => {
return sequelize.define(
"user",
{
id: {
type: type.INTEGER,
primaryKey: true,
autoIncrement: true,
},
first_name: type.STRING,
last_name: type.STRING,
credentials: type.STRING,
email: {
type: type.STRING,
allowNull: false,
},
password: {
type: type.STRING,
allowNull: false,
},
},
{
tableName: "Users",
}
);
};
Why cant I export these multiple objects?

I have the exact structure you're using by importing all sequelize models into one file then module.exporting them in an object and the only thing I see thats different is how you define your models. I might be out of date but I learned as such:
const Sequelize = require('sequelize');
const db = require('../db');
module.exports = db.define('users', {
id: {
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER,
unique: true
},
}, {
timestamps: true,
});
Db declaration
const Sequelize = require('sequelize');
const db = new Sequelize(
process.env.DATABASE_URL, {
logging: false
}
);
module.exports = db;
Then your central import
const User = require('./user');
const Order = require('./order');
Order.belongsTo(User)
User.hasMany(Order)
module.exports = {
User,
Order
};
Then using it
const models = require('./models');
const results = await models.User.destroy({
where: {
id: id
}
});
if(results){
return results;
}

Found what was wrong. In my passport.js file, where I defined my localStrategy, I was doing an incorrect import.
My export in sequelize.js was
modules.export = {Item, User, Reservation};
while my import in passport.js was just
const User = require("../sequelize");
when it should have been
const Model = require("../sequelize");
const User = Model.User;
looks like I had it imported correctly in my signUp route, but not in my passport config file!

Sequelize.js/Node.js/Express.js: Tasks.findAll()returns a TypeError:Cannot read property 'findAll' of undefined

code is supposed to return a a JSON object with empty tasks when requesting /tasks instead it returns a message error- TypeError: cannot read property 'findAll' of undefined. The source of errors as per the message comes from routes >tasks.js see below for screenshots or/and live code on sandbox.
Project Folder:
sandbox
some codes:
src>models >tasks.js
module.exports = (sequelize, DataType) => {
const Tasks = sequelize.define(
"Tasks",
{
id: {
type: DataType.INTEGER,
primaryKey: true,
autoIncrement: true
},
title: {
type: DataType.STRING,
allowNull: false,
validate: {
notEmpty: true
}
},
done: {
type: DataType.BOOLEAN,
allowNull: false,
defaultValue: false
}
},
{
classMethods: {
associate: models => {
Tasks.belongsTo(models.Users);
}
}
}
);
return Tasks;
};
src>routes>tasks.js
module.exports = app => {
const Tasks = app.db.models.tasks;
app.get("/tasks", (req, res) => {
Tasks.findAll({}).then(tasks => {//source of error as per error message
res.json({ tasks: tasks });
});
});
};
src >db.js
var path = require("path");
var fs = require("fs");
var Sequelize = require("sequelize");
//const config = require("./libs/config.js");
var sequelize = null;
let db = null;
module.exports = app => {
if (!db) {
const config = app.libs.config;
sequelize = new Sequelize(
config.database,
config.username,
config.password,
config.params
);
db = {
sequelize,
Sequelize,
models: {}
};
const dir = path.join(__dirname, "models");
fs.readdirSync(dir).forEach(file => {
const modelDir = path.join(dir, file);
const model = sequelize.import(modelDir);
db.models[model.name] = model;
});
Object.keys(db.models).forEach(key => {
db.models[key].options.classMethods.associate(db.models);
});
}
return db;
};
src>index.js
var express = require("express");
var consign = require("consign");
var app = express();
consign({ cwd: "src" })
.include("./libs/config.js")
.then("db.js")
.then("./libs")
.then("./routes")
.into(app);

On file routes/tasks.js line 2, add a capital on task;
const Tasks = app.db.models.Tasks;
Then it should works.

How to connect to multiple databases through Sequelize?

I need to connect to different databases depending on the Express route.
For example:
example.com/oneapp
This route must access a database called oneapp
example.com/secondapp
This route must access a database called secondapp
I have these settings in my Sequelize
index.js:
const fs = require('fs');
const path = require('path');
const Sequelize = require('sequelize');
const config = require('../../config/database.js');
const db = {};
const sequelize = new Sequelize(config.producao);
fs
.readdirSync(__dirname)
.filter(file => (file.indexOf('.') !== 0) && (file !== path.basename(__filename)) && (file.slice(-3) === '.js'))
.forEach((file) => {
const model = sequelize.import(path.join(__dirname, file));
db[model.name] = model;
});
console.log(db)
Object.keys(db).forEach((modelName) => {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
database.js
module.exports = {
"producao": {
username: 'sa',
password: 'mypass',
database: 'PRODUCAO',
host: 'SVRNAZ002',
dialect: 'mssql',
}
}

Run that code twice with different db settings and keep two sets of the sequelize connection object and array of models.
const fs = require('fs');
const path = require('path');
const Sequelize = require('sequelize');
const configs = [require('../../config/database.js'), require('../../config/database2.js')];
module.exports = configs.map(config => {
const db = {};
const sequelize = new Sequelize(config.producao);
// load stuff like normal
db.sequelize = sequelize;
db.Sequelize = Sequelize;
return db;
});
Now you can access both:
const models = require('index');
const firstdb = models[0];
const seconddb = models[1];

maybe this is not the right answer, but I use it and it works.
first I use it for databases usually, the second for images
db.js
const {Sequelize} = require('sequelize')
const config = [
{
dialect: 'sqlite',
storage: './db.sqlite'
},
{
dialect: 'sqlite',
storage: './db_gambar.sqlite'
}
]
const database = config.map( x => new Sequelize(x));
module.exports = { database }
./models/akun.js
const { DataTypes, Model } = require('sequelize');
const { database} = require('./../db');
const sequelize = database[0];
// Tambahan is extend Model
class Akun extends Tambahan{}
Akun.init({
name: {
type: DataTypes.STRING,
allowNull: false
},
email: {
type: DataTypes.STRING,
allowNull: false,
unique: true
},
password: {
type: DataTypes.STRING,
allowNull: false,
}
},{ sequelize, underscored: true})
./models/gambar.js
const { DataTypes, Model } = require('sequelize');
const { database } = require('./../db');
const sequelize = database[1];
// Tambahan is extend Model
class Gambar extends Tambahan{}
Gambar.init({
name: {
type: DataTypes,
allowNull: false
},
user_id: {
type:DataTypes.INTEGER,
allowNull: false
},
data: {
type:DataTypes.BLOB,
allowNull: false
},
thumbnail: {
type: DataTypes.BLOB,
allowNull: false
}
},{ sequelize , underscored: true})

Best way to import sequelize models in node.js

I am using sequelize orm in node.js. I have made models folders for all model like userModel.js, in userModel.js I have some class-based functions like login and getToken.
// some code of userModel.js
const jwt = require('jsonwebtoken');
module.exports = (sequelize, Sequelize) => {
const UserSchema = sequelize.define('User', {
first_name: {
type: Sequelize.STRING,
},
last_name: {
type: Sequelize.STRING,
},
});
// generate token
UserSchema.genToken = (id) => {
return jwt.sign({ id }, 'test');
}
// user login
UserSchema.login = function (body) {
const User = this;
return User.findOne({
where: { email: body.email}
})
.then((result) => {
return result;
})
.catch((err) => {
return Promise.reject(err);
})
}
return UserSchema;
}
when i import userModel.js in db.js
const Sequelize = require('sequelize');
const config = {};
var db = {};
const sequelize = new Sequelize(config.database, config.username, config.password, {
host: config.host,
dialect: config.dialect,
operatorsAliases: false,
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
db.User = sequelize.import('./../models/userModel');
module.exports = db;
so my question is when I using db variable for userModel like
db.User
I am using VS code editor for coding. So now VS code is showing me all suggestion of sequelize models but it is not showing my functions for login and genToken
//suggest
db.User.find()
db.User.findOne()
//but not include these
db.User.login()
db.User.genToken()
Even when I use db.User.login() or db.User.genToken() it's working as I want but right now I will have to open userModel.js again and again for seeing the name of all functions. How can I import models in a better way?

How do I require something from index.js in the same directory?

I have the following file structure:
models/
index.js
something.js
user.js
In index.js (this is generated by Sequalize and importing stuff from here works in other directories):
'use strict';
var fs = require('fs');
var path = require('path');
var Sequelize = require('sequelize');
var basename = path.basename(module.filename);
var env = process.env.NODE_ENV || 'development';
var config = require(__dirname + '/../config/config')[env];
var db = {};
if (config.use_env_variable) {
var sequelize = new Sequelize(process.env[config.use_env_variable]);
} else {
var sequelize = new Sequelize(config.database, config.username, config.password, config);
}
fs
.readdirSync(__dirname)
.filter(function(file) {
return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
})
.forEach(function(file) {
var model = sequelize['import'](path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db; // <<< I want to import that in something.js
user.js:
'use strict';
module.exports = (sequelize, DataTypes) => {
const User = sequelize.define('User', {
username: { type: DataTypes.STRING, allowNull: false, unique: true },
password: { type: DataTypes.STRING, allowNull: false },
}, {
classMethods: {
associate() {},
},
});
return User;
};
something.js:
'use strict';
// this all logs an empty object
console.log(require('./index'));
console.log(require('.'));
console.log(require('./'));
console.log(require('../models'));
console.log(require('../models/'));
console.log(require('../models/index'));
module.exports = (sequelize, DataTypes) => {
const Something = sequelize.define('Something', {
name: DataTypes.STRING,
}, {
classMethods: {
associate(models) {
},
},
});
return Something;
};
If I require db from files in other directories it works so I guess it's not a problem with exporting.
How can I require db in something.js so it's not undefined?

const neededStuff = require('./'); // the best
or:
const neededStuff = require('./index');
or:
const neededStuff = require('../models/');

Turns out it was a circular dependency. index.js was importing stuff from something.js and then I tried to import index.js in something.js.
If module A requires('B') before it has finished setting up it's exports, and then module B requires('A'), it will get back an empty object instead what A may have intended to export.
http://selfcontained.us/2012/05/08/node-js-circular-dependencies/
But you can use methods from another model in sequelize with sequelize.models.Something.