Create a seeder file: Use php artisan make:seeder UserSeeder to generate the seeder class, and insert data through the model factory or database query in the run method; 2. Call other seeder in DatabaseSeeder: register UserSeeder, PostSeeder, etc. in order through $this->call() to ensure the dependency is correct; 3. Run seeder: execute php artisan db:seed to run all registered seeders, or use php artisan migrate:fresh --seed to reset and refill the data; 4. Optionally run a specific seeder separately: use php artisan db:seed --class=UserSeeder only executes the specified seeder; it is recommended to use the model factory to generate real data, so as to sow it only in the local environment, pay attention to the order of foreign key dependence, avoid misoperation in the production environment, and effectively manage the initial database data.
Seeding a database in Laravel is a straightforward process that lets you populate your database with test or initial data. Here's how to do it properly.

1. Create a Seeder File
Laravel uses seeder classes to insert data. You can create one using Artisan:
php artisan make:seeder UserSeeder
This creates a file in database/seeders/UserSeeder.php
.

Inside the run()
method, you can add Eloquent model instances or DB queries:
<?php namespace Database\Seeders; use Illuminate\Database\Seeder; use App\Models\User; class UserSeeder extends Seeder { public function run() { User::factory()->create([ 'name' => 'John Doe', 'email' => 'john@example.com', ]); // Or create multiple users using the factory User::factory()->count(10)->create(); } }
? Make sure you have a corresponding model and factory if you're using
User::factory()
.
2. Call Seeders from the DatabaseSeeder
The main seeder is DatabaseSeeder
( database/seeders/DatabaseSeeder.php
). Use it to call other seeders:
<?php namespace Database\Seeders; use Illuminate\Database\Seeder; class DatabaseSeeder extends Seeder { public function run() { $this->call([ UserSeeder::class, PostSeeder::class, CommentSeeder::class, ]); } }
This ensures your seeders run in order.
3. Run the Seeder
To run the seeder:
php artisan db:seed
This runs the DatabaseSeeder
, which in turn calls any others you've specified.
? If you want to reset the database first (migrate fresh and seed), use:
php artisan migrate:fresh --seed
Or seed after regular migration:
php artisan migrate php artisan db:seed
4. Optional: Seed Specific Classes
You can run a single seeder without affecting others:
php artisan db:seed --class=UserSeeder
Useful during development when testing data.
Tips for Effective Seeding
Use Model Factory : Define factories in
database/factories/
to generate realistic data.Check Environment : Avoid seeing in production unless necessary:
public function run() { if (app()->environment('local')) { // Only seed test data in local User::factory()->count(50)->create(); } }
Handle Foreign Keys : If your tables have relationships, make sure to see parent tables first (eg, users before posts).
Basically, Laravel's seeder system gives you full control over initial data. Just create the classes, call them in order, and use db:seed
when needed. Not complicated — but powerful when combined with factories.
The above is the detailed content of How to seed a database in Laravel?. For more information, please follow other related articles on the PHP Chinese website!

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