RailwayTwo/database/seeds/DayStatSeeder.php

<?php

use Illuminate\Database\Seeder;

class DayStatSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $devices = \App\Models\Device::all();
        \App\Models\DayStat::truncate();
        $projects = \App\Models\Project::all();
        for($i = 0; $i < 100; $i++) {
            \App\Models\DayStat::create([
                'date' => \Carbon\Carbon::now()->subDays(mt_rand(1, 100))->toDateString(),
                'device_id' => $devices->random()->id,
                'project_id' => $projects->random()->id,
                'money' => mt_rand(1000, 9999)
            ]);
        }
    }
}