baoshi-was/database/factories/StationTaskChildrenFactory.php

<?php

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

use App\StationTaskChildren;
use Faker\Generator as Faker;

$factory->define(StationTaskChildren::class, function (Faker $faker) {
    return [
        "station_task_id" => factory(\App\StationTask::class),
        "station_task_table_type" => \Illuminate\Support\Str::random(5),
        "station_task_table_id" => rand(1,5),
    ];
});