@celleb/sqlz-model-extend

Extends sequelize model instance with additional methods that returns the raw or toJSON object(s). The return types of these methods are set to the read-attributes of the specified model.

An additional type is also provided to describe the db or model/index import called DbDefined.

Getting started

npm install --save @celleb/sqlz-model-extend

Install sequelize and or sequelize-cli if you haven't already.

npm i --save sequelize
npm i --save-dev @types/node @types/validator
npm i --save-dev sequelize-cli

Definition

/**
 *@param model - Sequelize model
 */
function extendModel<R, W>(model: ModelCtor<Model<R, W>> | ModelDefined<R, W>);

Usage

import { extendModel } from '@celleb/sqlz-model-extend';
import { UserModel } from './user-model';

const modelX = extendModel(UserModel);

Example:

import { extendModel, DbDefined } from '@celleb/sqlz-model-extend';
import { ModelDefined } from 'sequelize';

// using models created using sequelize-cli db:
const db: DbDefined = require('./models');

type UserWriteAttributes = {
 firstName?: string;
 lastName?: string;
 email?: string;
};

type UserReadAttributes = Required<UserWriteAttributes> & {
 id: number;
 fullName?: string;
 createdAt: string;
 updateAt: string;
};

const userModel = extendModel(db['User'] as ModelDefined<UserReadAttributes, UserWriteAttributes>);

await userModel.getAll(); // returns UserReadAttributes[]

Another Example:

import { Sequelize, Model, DataTypes, Optional, ModelDefined } from 'sequelize';

import { extendModel } from '@celleb/sqlz-model-extend';

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

interface UserAttributes {
 id: string;
 firstName: string;
 lastName: string;
 email: string;
}

interface UserCreationAttributes extends Optional<UserAttributes, 'id'> {}

class User extends Model<UserAttributes, UserCreationAttributes> implements UserAttributes {
 public id!: number;
 public firstName!: string;
 public lastName!: string;
 public email!: string;

 public readonly createdAt!: Date;
 public readonly updatedAt!: Date;
}

User.init(
 {
  id: {
   type: DataTypes.INTEGER.UNSIGNED,
   autoIncrement: true,
   primaryKey: true,
  },
  firstName: {
   type: new DataTypes.STRING(128),
   allowNull: false,
  },
  lastName: {
   type: new DataTypes.STRING(128),
   allowNull: false,
  },
  email: {
   type: new DataTypes.STRING(128),
   allowNull: false,
  },
 },
 {
  tableName: 'Users',
  sequelize,
 }
);

const userModel = extendModel(User as ModelDefined<UserAttributes, UserCreationAttributes>);

await userModel.getAll(); // returns UserAttributes[]

Available methods

These methods are in addition to the usual sequelize model methods. These methods take same parameters as those they are using. All methods calls .toJSON on the returned objects unless raw is to true.

Method	Uses	Info
.bulkInsert	.bulkCreate	Forces returning: true
.getAll	.findAll	Set option {raw: true} to get the raw objects otherwise .toJSON values will be returned.
.getByPk	.findByPk	Set option {raw: true} to get the raw objects otherwise .toJSON values will be returned. Forces rejectOnEmpty: false and returns null when no record is found.
.getOne	.findOne	Set option {raw: true} to get the raw objects otherwise .toJSON values will be returned. Forces rejectOnEmpty: false and returns null when no record is found.
.getOrCreate	.findOrCreate	Set option {raw: true} to get the raw objects otherwise .toJSON values will be returned.
.insert	.create	Forces returning: true
.patch	.update	Forces returning: true
.upPatch	.upsert	Forces returning: true

DbDefined Interface

interface DbDefined extends Record<string, any> {
 Sequelize: Sequelize;
 sequelize: Sequelize;
}