Sequelize extend Model Class in Typescript

Question

I am working on a legacy project that we would like to migrate to Typescript. It has models defined in the following format:

import Sequelize from "sequelize";

class MyModel extends Sequelize.Model {
  public static init(sequelize) {
    const attributes = {
      userId: {
        type: Sequelize.INTEGER,
        allowNull: false,
        field: "user_id"
      },
      createdAt: {
        type: Sequelize.DATE,
        field: "created_at"
      }
    };

    super.init(attributes, {
      sequelize
    });
  }
}

export default MyModel;

I would like to convert them to typescript without having to change the interface for consumers. By that I mean I want to extend Sequelize.Model and I want to define a public static init method.

I am getting the following error from Typescript on Sequelize.Model

Type 'Model<any, any>' is not a constructor function type.

And all of the research I've done points to using Sequelize.define to define models.

This being a legacy project I don't want to re-write all of my models just to conform to the types so I'm wondering how I can properly extend Sequelize.Model?

Thanks

Answer 1

Try This

public static init(sequelize) {
    super.init.call(this,{ 
        id: {
        type: DataTypes.INTEGER.UNSIGNED,
        autoIncrement: true,
        primaryKey: true,
        },  
        text: {
        type: DataTypes.STRING(5000) // extra long length
        }  
    }, {
        sequelize: sequelize
    });
}