sequelize-auto-seeder

A generic, model-agnostic data seeder for Sequelize that automatically generates fake data using Faker.js.
Perfect for development, testing, or populating your database with realistic mock data.

Features

• Generate random data for any Sequelize model
• Automatically handles UUIDs, ENUMs, JSON, dates, booleans, and numbers
• Supports foreign key relationships
• Allows custom overrides for specific fields
• Works in seeders, scripts, or test setups
• Lightweight and easy to use

Installation

npm install sequelize-auto-seeder

Usage

Basic Example

const { autoSeed } = require("sequelize-auto-seeder");
const { User, Category, Insight } = require("./models");

(async () => {
  await autoSeed(Insight, 10, {
    relations: {
      userId: User,
      categoryId: Category,
    },
  });

  console.log("✅ Seeder ran successfully!");
})();

Overrides Example

const { autoSeed } = require("sequelize-auto-seeder");
const { Insight } = require("./models");

(async () => {
  await autoSeed(Insight, 5, {
    overrides: {
      type: "news",
      priority: () => ["top", "normal"][Math.floor(Math.random() * 2)],
      metadata: () => ({
        views: Math.floor(Math.random() * 1000),
        tags: ["sports", "basketball"],
      }),
    },
  });
  console.log("✅ Seeder ran successfully with overrides!");
})();

Relations / Foreign Keys Example

const { autoSeed } = require("sequelize-auto-seeder");
const { User, Category, Insight } = require("./models");
(async () => {
  await autoSeed(Insight, 20, {
    relations: {
      userId: User,
      categoryId: Category,
    },
  });
  console.log("✅ Seeder ran successfully with relations!");
})();