Define.ts

/**
 * Keep this file in sync with the code in the "Usage of `sequelize.define`"
 * section in typescript.md
 */
import { Sequelize, Model, DataTypes, Optional } from 'sequelize';

const sequelize = new Sequelize('mysql://root:asd123@localhost:3306/mydb');

// We recommend you declare an interface for the attributes, for stricter typechecking
interface UserAttributes {
  id: number;
  name: string;
}

// Some fields are optional when calling UserModel.create() or UserModel.build()
interface UserCreationAttributes extends Optional<UserAttributes, 'id'> {}

// We need to declare an interface for our model that is basically what our class would be
interface UserInstance
  extends Model<UserAttributes, UserCreationAttributes>,
    UserAttributes {}

const UserModel = sequelize.define<UserInstance>('User', {
  id: {
    primaryKey: true,
    type: DataTypes.INTEGER.UNSIGNED,
  },
  name: {
    type: DataTypes.STRING,
  }
});

async function doStuff() {
  const instance = await UserModel.findByPk(1, {
    rejectOnEmpty: true,
  });
  console.log(instance.id);
}