Laravel 12 — Database Seeder: One-to-Many Relationship Example

A practical tutorial by ItStuffSolutions

📌 Overview

In this tutorial you’ll learn how to seed database tables in Laravel 12 using a one-to-many relationship (i.e., hasMany / belongsTo). We’ll cover how to set up the model relationship, migrations, factories, seeders and how to run them to populate sample data. Read Full Tutorial : Database Seeder: One-to-Many Relationship Example

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✅ What you’ll achieve

• Define two Eloquent models with a one-to-many relationship (for example, User → Post).
• Create migrations for both tables including the foreign key.
• Create model factories for generating dummy data.
• Write seeders that coordinate the relationship and generate records.
• Run the seeders and verify the results.

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🚀 Prerequisites

• Laravel 12 project already set up.
• Database configured in your .env file (e.g., MySQL / SQLite).
• Basic understanding of migrations, Eloquent models & factories.
• Composer and Artisan CLI available.

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🛠 Step by Step Guide

1. Define the Migrations

Create migrations for both tables, e.g.:

php artisan make:migration create_users_table
php artisan make:migration create_posts_table