Factories.md

Factories

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1. Factory callbacks

2. Generate Images with Seeds/Factories

3. Override values and apply custom login to them

4. Using factories with relationships

5. Create models without dispatching any events

6. Useful for() method

Factory callbacks

While using factories for seeding data, you can provide Factory Callback functions to perform some action after record is inserted.

$factory->afterCreating(App\User::class, function ($user, $faker) {
    $user->accounts()->save(factory(App\Account::class)->make());
});

Generate Images with Seeds/Factories

Did you know that Faker can generate not only text values but also IMAGES? See avatar field here - it will generate 50x50 image:

$factory->define(User::class, function (Faker $faker) {
    return [
        'name' => $faker->name,
        'email' => $faker->unique()->safeEmail,
        'email_verified_at' => now(),
        'password' => bcrypt('password'),
        'remember_token' => Str::random(10),
        'avatar' => $faker->image(storage_path('images'), 50, 50)
    ];
});

Override values and apply custom login to them

When creating records with Factories, you can use Sequence class to override some values and apply custom logic to them.

$users = User::factory()
                ->count(10)
                ->state(new Sequence(
                    ['admin' => 'Y'],
                    ['admin' => 'N'],
                ))
                ->create();

Using factories with relationships

When using factories with relationships, Laravel also provides magic methods.

// magic factory relationship methods
User::factory()->hasPosts(3)->create();

// instead of
User::factory()->has(Post::factory()->count(3))->create();

Tip given by @oliverds_

Create models without dispatching any events

Sometimes you may wish to update a given model without dispatching any events. You may accomplish this using the updateQuietly method

Post::factory()->createOneQuietly();
Post::factory()->count(3)->createQuietly();
Post::factory()->createManyQuietly([
    ['message' => 'A new comment'],
    ['message' => 'Another new comment'],
]);

Useful for() method

The Laravel factory has a very useful for() method. You can use it to create belongsTo() relationships.

public function run()
{
    Product::factory()
        ->count(3);
        ->for(Category::factory()->create())
        ->create();    
}

Tip given by @mmartin_joo