baoshi-was/database/factories/OwnerBillReportFactory.php

<?php

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

use App\OwnerBillReport;
use Faker\Generator as Faker;
$owner = \App\Owner::query()->whereNotNull("user_owner_group_id")->first();
$factory->define(OwnerBillReport::class, function (Faker $faker)use(&$owner) {
    if (!$owner)$owner = \App\Owner::query()->whereNotNull("user_owner_group_id")->first();
    $initial_fee = mt_rand(0,50000) / 10;
    $confirm_fee = mt_rand(0,50000) / 10;
    return [
        "owner_id" => $owner ? $owner->id : factory(\App\Owner::class),       //项目ID
        "counting_month" => $faker->date(), //结算月
        "initial_fee" => $initial_fee,    //原始账单金额
        "confirm_fee" => $confirm_fee,    //确认账单金额
        "difference" => $confirm_fee - $initial_fee,     //差额
        "confirmed" => "否",      //确认状态
    ];
});