spee.ch/models/index.js

const fs = require('fs')
const path = require('path')
const Sequelize = require('sequelize')
const basename = path.basename(module.filename)
const config = require('config')
const db = {}

const connectionUri = config.get('Database.MySqlConnectionUri')
const sequelize = new Sequelize(connectionUri)

sequelize
  .authenticate()
  .then(() => {
    console.log('Connection has been established successfully.')
  })
  .catch(err => {
    console.error('Unable to connect to the database:', err)
  })

fs.readdirSync(__dirname).filter(file => file.indexOf('.') !== 0 && file !== basename && file.slice(-3) === '.js').forEach(file => {
  const model = sequelize['import'](path.join(__dirname, file))
  db[model.name] = model
})

Object.keys(db).forEach(modelName => {
  if (db[modelName].associate) {
    db[modelName].associate(db)
  }
})

db.sequelize = sequelize
db.Sequelize = Sequelize

module.exports = db