baoshi-was/database/factories/OwnerMaterialFactory.php

<?php

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

use App\OwnerMaterial;
use Faker\Generator as Faker;

$factory->define(OwnerMaterial::class, function (Faker $faker) {
    return [
        'owner_id' => 1,
        'material_id' => 1,
        'material_code' => \Illuminate\Support\Str::random(5),
        'size' => \Illuminate\Support\Str::random(10),
        'special'=>\Illuminate\Support\Str::random(10),
        'specification' => \Illuminate\Support\Str::random(10),
        'initiator'=>1];
});