TaskFactory.php

<?php

/** @var \App\ExtendedFactory $factory */

use App\User;
use App\Category;
use App\Project;
use Faker\Generator as Faker;

$factory->define(Task::class, function (Faker $faker) {
    return [
        // 
    ];
});


$factory->cascadeState(Task::class, 'project',
    function (Task $task, $faker) {
        $task->project_id = factory(Project::class)->cascade()->create()->getKey();
    }
);

$factory->cascadeState(Task::class, 'assignee',
    function (Task $task, $faker) {
        $task->assignee_id = factory(User::class)->cascade()->create()->getKey();
    }
);

$factory->cascadeState(Task::class, 'taskCategory',
    function (Task $task, $faker) {
        $task->category_id = factory(Category::class)->cascade()->create()->getKey();
    }
);

$factory->reuseState(Task::class, 'project',
    function (Task $task, $faker) {
        $task->project_id = Project::::query()->inRandomOrder()->first()->getKey();
    }
);

$factory->reuseState(Task::class, 'assignee',
    function (Task $task, $faker) {
        $task->assignee_id = User::::query()->inRandomOrder()->first()->getKey();
    }
);

$factory->reuseState(Task::class, 'taskCategory',
    function (Task $task, $faker) {
        $task->category_id = Category::query()->inRandomOrder()->first()->getKey()
    }
);