# Factories

• Using Factories to Generate Related Models
• Set Factory State
• Factory Relationships
  • Has Many Relationships
  • Nested Relationships
    • randomFloat
  • Unique Data
• Additional Resources

# Using Factories to Generate Related Models

When creating a model with relationships, you can use factories to generate related models.

return [
    'started_at' => now(),
    'user_id' => User::factory(), // Use the User factory to generate a user_id
];

# Set Factory State

public function published(?Carbon $date = null): self
{
    return $this->state(
        fn (array $attr) => ['published_at' => $date ?? Carbon::now()]
    );
}

# Factory Relationships

# Has Many Relationships

$course = Course::factory()
            ->has(Chapter::factory()->count(3))
            ->create();

# Nested Relationships

$course = Course::factory()
            ->has(Chapter::factory()
                ->has(Media::factory()->count(3))
                ->count(3)
            )
            ->create();

## Fake Data

### Numbers

#### `randomDigit`, `randomNumber`, `numberBetween` 

```php
// an integer between 0 and 9
$this->faker->randomDigit();
// random integer with UP TO n digits (123, 43, 19238, 5, or 1203)
$this->faker->randomNumber(5, false);
// random integer with EXACTLY n digits (2643, 42931, or 32919)
$this->faker->randomNumber(5, true);
// integer between
'price' => $this->faker->numberBetween(500, 100000);

# randomFloat

randomFloat($nbMaxDecimals = null, $min = 0, $max = null): 

'price' => $this->faker->randomFloat(2),
'price' => $this->faker->randomFloat(2, 5, 30);
'price' => ceil($this->faker->randomFloat(2, 5, 10.50)*10)/10,

# Unique Data

You can generate unique data simply by using the unique method.

'code' => $this->faker->unique()->numberBetween(1000000, 9000000),
'code' => $this->faker->unique()->randomNumber()

# Additional Resources

• FakerPHP Docs