liwo/database/factories/WorkFactory.php

<?php

/** @var \Illuminate\Database\Eloquent\Factory $factory */

use App\Work;
use Carbon\Carbon;
use Faker\Generator as Faker;

$factory->define(Work::class, function (Faker $faker) {
    $started_at = $faker->dateTime('now');
    $ended_at = $faker->dateTime('now');
//    $minute_sum = $ended_at->diffInMinutes($started_at);
    return [
        'business_id' => $faker->numberBetween(1, 200),
        'project_id' => $faker->numberBetween(1, 200),
        'task_id' => $faker->numberBetween(1, 200),
        'user_id' => $faker->numberBetween(1, 5000),
        'message' => $faker->name,
        'minute_sum' => $faker->numberBetween(100, 5000),
        'started_at' => $started_at,
        'ended_at' => $ended_at,
    ];
});