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    Automatically generate models for SequelizeJS via the command line.


    npm install sequelize-auto


    You will need to install sequelize; it's no longer installed by sequelize-auto.

    You will need to install the correct dialect binding before using sequelize-auto.

    Dialect Install
    MySQL/MariaDB npm install sequelize mysql2
    Postgres npm install sequelize pg pg-hstore
    Sqlite npm install sequelize sqlite3
    MSSQL npm install sequelize tedious


    sequelize-auto -h <host> -d <database> -u <user> -x [password] -p [port]  --dialect [dialect] -c [/path/to/config] -o [/path/to/models] -t [tableName]
        --help               Show help                                   [boolean]
        --version            Show version number                         [boolean]
    -h, --host               IP/Hostname for the database.                [string]
    -d, --database           Database name.                               [string]
    -u, --user               Username for database.                       [string]
    -x, --pass               Password for database. If specified without providing
                              a password, it will be requested interactively from
                              the terminal.
    -p, --port               Port number for database (not for sqlite). Ex:
                              MySQL/MariaDB: 3306, Postgres: 5432, MSSQL: 1433
    -c, --config             Path to JSON file for Sequelize-Auto options and
                              Sequelize's constructor "options" flag object as
                              defined here:
    -o, --output             What directory to place the models.          [string]
    -e, --dialect            The dialect/engine that you're using: postgres,
                              mysql, sqlite, mssql                         [string]
    -a, --additional         Path to JSON file containing model options (for all
                              tables). See the options:
        --indentation        Number of spaces to indent                   [number]
    -t, --tables             Space-separated names of tables to import     [array]
    -T, --skipTables         Space-separated names of tables to skip       [array]
    --caseModel, --cm        Set case of model names: c|l|o|p|u
                              c = camelCase
                              l = lower_case
                              o = original (default)
                              p = PascalCase
                              u = UPPER_CASE
    --caseProp, --cp         Set case of property names: c|l|o|p|u
    --caseFile, --cf         Set case of file names: c|l|o|p|u|k
                              k = kebab-case
    --noAlias                Avoid creating alias `as` property in relations
    --noInitModels           Prevent writing the init-models file        [boolean]
    -n, --noWrite            Prevent writing the models to disk          [boolean]
    -s, --schema             Database schema from which to retrieve tables[string]
    -v, --views              Include database views in generated models  [boolean]
    -l, --lang               Language for Model output: es5|es6|esm|ts
                              es5 = ES5 CJS modules (default)
                              es6 = ES6 CJS modules
                              esm = ES6 ESM modules
                              ts = TypeScript                             [string]
    --useDefine              Use `sequelize.define` instead of `init` for es6|esm|ts
    --singularize, --sg      Singularize model and file names from plural table
                              names                                      [boolean]

    On Windows, provide the path to sequelize-auto: node_modules\.bin\sequelize-auto [args]


    sequelize-auto -o "./models" -d sequelize_auto_test -h localhost -u my_username -p 5432 -x my_password -e postgres

    Produces a file/files such as ./models/User.js which looks like:

    module.exports = function(sequelize, DataTypes) {
      return sequelize.define('User', {
        id: {
          type: DataTypes.INTEGER,
          allowNull: false,
          primaryKey: true,
          autoIncrement: true
        username: {
          type: DataTypes.STRING(20),
          allowNull: true
        aNumber: {
          type: DataTypes.SMALLINT,
          allowNull: true
        dateAllowNullTrue: {
          type: DataTypes.DATE,
          allowNull: true
        defaultValueBoolean: {
          type: DataTypes.BOOLEAN,
          allowNull: true,
          defaultValue: true
      }, {
        tableName: 'User',

    Sequelize-auto also generates an initialization file, ./models/init-models.js, which contains the code to load each model definition into Sequelize:

    var DataTypes = require("sequelize").DataTypes;
    var _User = require("./User");
    var _Product = require("./Product");
    function initModels(sequelize) {
      var User = _User(sequelize, DataTypes);
      var Product = _Product(sequelize, DataTypes);
      return {
    module.exports = { initModels };

    This makes it easy to import all your models into Sequelize by calling initModels(sequelize).

    var initModels = require("./models/init-models");
    var models = initModels(sequelize);
    models.User.findAll({ where: { username: "tony" }}).then(...);

    Alternatively, you can Sequelize.import each model (for Sequelize versions < 6), or require each file and call the returned function:

    var User = require('path/to/user')(sequelize, DataTypes);


    You can use the -l es6 option to create the model definition files as ES6 classes, or -l esm option to create ES6 modules. Then you would require or import the classes and call the init(sequelize, DataTypes) method on each class.


    Add -l ts to cli options or lang: 'ts' to programmatic options. This will generate a TypeScript class in each model file, and an init-model.ts file to import and initialize all the classes.

    Note that you need TypeScript 4.x to compile the generated files.

    The TypeScript model classes are created as described in the Sequelize manual

    Example model class, order.ts:

    import Sequelize, { DataTypes, Model, Optional } from 'sequelize';
    import type { Customer, CustomerId } from './customer';
    import type { OrderItem, OrderItemId } from './order_item';
    export interface OrderAttributes {
      id: number;
      orderDate: Date;
      orderNumber?: string;
      customerId: number;
      totalAmount?: number;
      status: 'PROCESSING' | 'SHIPPED' | 'UNKNOWN';
    export type OrderPk = "id";
    export type OrderId = Order[OrderPk];
    export type OrderCreationAttributes = Optional<OrderAttributes, OrderPk>;
    export class Order extends Model<OrderAttributes, OrderCreationAttributes> implements OrderAttributes {
      id!: number;
      orderDate!: Date;
      orderNumber?: string;
      customerId!: number;
      totalAmount?: number;
      status!: 'PROCESSING' | 'SHIPPED' | 'UNKNOWN';
      // Order belongsTo Customer via customerId
      customer!: Customer;
      getCustomer!: Sequelize.BelongsToGetAssociationMixin<Customer>;
      setCustomer!: Sequelize.BelongsToSetAssociationMixin<Customer, CustomerId>;
      createCustomer!: Sequelize.BelongsToCreateAssociationMixin<Customer>;
      // Order hasMany OrderItem via orderId
      orderItems!: OrderItem[];
      getOrderItems!: Sequelize.HasManyGetAssociationsMixin<OrderItem>;
      setOrderItems!: Sequelize.HasManySetAssociationsMixin<OrderItem, OrderItemId>;
      addOrderItem!: Sequelize.HasManyAddAssociationMixin<OrderItem, OrderItemId>;
      addOrderItems!: Sequelize.HasManyAddAssociationsMixin<OrderItem, OrderItemId>;
      createOrderItem!: Sequelize.HasManyCreateAssociationMixin<OrderItem>;
      removeOrderItem!: Sequelize.HasManyRemoveAssociationMixin<OrderItem, OrderItemId>;
      removeOrderItems!: Sequelize.HasManyRemoveAssociationsMixin<OrderItem, OrderItemId>;
      hasOrderItem!: Sequelize.HasManyHasAssociationMixin<OrderItem, OrderItemId>;
      hasOrderItems!: Sequelize.HasManyHasAssociationsMixin<OrderItem, OrderItemId>;
      countOrderItems!: Sequelize.HasManyCountAssociationsMixin;
      static initModel(sequelize: Sequelize.Sequelize): typeof Order {
        id: {
          autoIncrement: true,
          type: DataTypes.INTEGER,
          allowNull: false,
          primaryKey: true
        orderDate: {
          type: DataTypes.DATE,
          allowNull: false,
          defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
          field: 'OrderDate'
        orderNumber: {
          type: DataTypes.STRING(10),
          allowNull: true,
          field: 'OrderNumber'
        customerId: {
          type: DataTypes.INTEGER,
          allowNull: false,
          references: {
            model: 'customer',
            key: 'Id'
          field: 'CustomerId'
        totalAmount: {
          type: DataTypes.DECIMAL(12,2),
          allowNull: true,
          defaultValue: 0.00,
          field: 'TotalAmount'
        status: {
          type: DataTypes.ENUM('PROCESSING','SHIPPED','UNKNOWN'),
          allowNull: false,
          defaultValue: "UNKNOWN",
          field: 'Status'
      }, {
        tableName: 'order',
        timestamps: false,
      return Order;

    Example init-models.ts:

    import { Sequelize } from "sequelize";
    import { Customer, CustomerAttributes, CustomerCreationAttributes } from "./customer";
    import { Order, OrderAttributes, OrderCreationAttributes } from "./order";
    import { OrderItem, OrderItemAttributes, OrderItemCreationAttributes } from "./order_item";
    import { Product, ProductAttributes, ProductCreationAttributes } from "./product";
    import { Supplier, SupplierAttributes, SupplierCreationAttributes } from "./supplier";
    export {
      Customer, CustomerAttributes, CustomerCreationAttributes,
      Order, OrderAttributes, OrderCreationAttributes,
      OrderItem, OrderItemAttributes, OrderItemCreationAttributes,
      Product, ProductAttributes, ProductCreationAttributes,
      Supplier, SupplierAttributes, SupplierCreationAttributes,
    export function initModels(sequelize: Sequelize) {
      Order.belongsTo(Customer, { as: "customer", foreignKey: "customerId"});
      Customer.hasMany(Order, { as: "orders", foreignKey: "customerId"});
      OrderItem.belongsTo(Order, { as: "order", foreignKey: "orderId"});
      Order.hasMany(OrderItem, { as: "orderItems", foreignKey: "orderId"});
      OrderItem.belongsTo(Product, { as: "product", foreignKey: "productId"});
      Product.hasMany(OrderItem, { as: "orderItems", foreignKey: "productId"});
      Product.belongsTo(Supplier, { as: "supplier", foreignKey: "supplierId"});
      Supplier.hasMany(Product, { as: "products", foreignKey: "supplierId"});
      return {
        Customer: Customer,
        OrderItem: OrderItem,
        Order: Order,
        Product: Product,
        Supplier: Supplier,

    Model usage in a TypeScript program:

    // Order is the sequelize Model class
    // OrderAttributes is the interface defining the fields
    // OrderCreationAttributes is the interface defining the fields when creating a new record
    import { initModels, Order, OrderCreationAttributes } from "./models/init-models";
    // import models into sequelize instance
    const myOrders = await Order.findAll({ where: { "customerId": }, include: ['customer'] });
    const attr: OrderCreationAttributes = {
      orderDate: new Date(),
      orderNumber: "ORD123",
      totalAmount: 223.45
    const newOrder = await Order.create(attr);

    Configuration options

    For the -c, --config option, various JSON/configuration parameters are defined by Sequelize's options flag within the constructor. See the Sequelize docs for more info.

    Programmatic API

    const SequelizeAuto = require('sequelize-auto');
    const auto = new SequelizeAuto('database', 'user', 'pass'); => {
      console.log(data.tables);      // table and field list
      console.log(data.foreignKeys); // table foreign key list
      console.log(data.indexes);     // table indexes
      console.log(data.hasTriggerTables); // tables that have triggers
      console.log(data.relations);   // relationships between models
      console.log(data.text)         // text of generated models

    With options:

    const auto = new SequelizeAuto('database', 'user', 'pass', {
        host: 'localhost',
        dialect: 'mysql'|'mariadb'|'sqlite'|'postgres'|'mssql',
        directory: './models', // where to write files
        port: 'port',
        caseModel: 'c', // convert snake_case column names to camelCase field names: user_id -> userId
        caseFile: 'c', // file names created for each model use camelCase.js not snake_case.js
        singularize: true, // convert plural table names to singular model names
        additional: {
            timestamps: false
            // ...options added to each model
        tables: ['table1', 'table2', 'myschema.table3'] // use all tables, if omitted

    Or you can create the sequelize instance first, using a connection string, and then pass it to SequelizeAuto:

    const SequelizeAuto = require('sequelize-auto');
    const Sequelize = require('sequelize');
    // const sequelize = new Sequelize('sqlite::memory:');
    const sequelize = new Sequelize('postgres://');
    const options = { caseFile: 'l', caseModel: 'p', caseProp: 'c' };
    const auto = new SequelizeAuto(sequelize, null, null, options);;



    To set up:

    1. Create an empty database called sequelize_auto_test on your database server (sqlite excepted)

    2. Create a .env file from sample.env and set your username/password/port etc. The env is read by test/config.js

    3. Build the TypeScript from the src directory into the lib directory:

      npm run build

    Then run one of the test commands below:

    # mysql only
    npm run test-mysql
    # postgres only
    npm run test-postgres
    # mssql  only
    npm run test-mssql
    # sqlite only
    npm run test-sqlite

    Also see the sample directory which has an example including database scripts, export script, and a sample app.


    npm i sequelize-auto

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