hainan/app/AdminAgent/Controllers/WithdrawalAlipayController.php

<?php

namespace App\AdminAgent\Controllers;

use App\AdminAgent\Repositories\WithdrawalAlipay;
use App\Models\Agent;
use App\Models\Withdrawal;
use App\Traits\DemandTraits;
use App\Traits\WithdrawalTraits;
use Dcat\Admin\Admin;
use Dcat\Admin\Form;
use Dcat\Admin\Grid;
use Dcat\Admin\Repositories\EloquentRepository;
use Dcat\Admin\Show;
use Dcat\Admin\Http\Controllers\AdminController;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\DB;

class WithdrawalAlipayController extends AdminController
{

    /**
     * Make a form builder.
     *
     * @return Form
     */
    protected function form()
    {
        return Form::make(new WithdrawalAlipay(), function (Form $form) {
        	$auto = Withdrawal::query()
				->with('pay')
				->where([
					'user_id' => Admin::user()->id,
					'user_type' => DemandTraits::$col[0],
					'status' => WithdrawalTraits::$state[3],
					'pay_type' => WithdrawalTraits::$userType[0],
				])
				->orderByDesc('updated_at')
				->first();

			$form->display('id');
			$form->decimal('price','提现金额')->required()->type('number')->attribute('min', 0)->default($auto->price ?? 0);
			$form->text('account')->required()->maxLength(50)->default($auto->pay->account ?? '');
			$form->text('name')->required()->maxLength(50)->default($auto->pay->name ?? '');
			$form->image('qrcode');
			$form->hidden('withdrawal_id');

           $form->saving(function (Form $form) {
			   $user = Agent::query()->where('id', Admin::user()->id)->lockForUpdate()->first();
			   if ($form->price > $user->balance) {
			   		return $form->response()->error('余额不足,当前可用余额为'.$user->balance);
			   }

			   $user->balance = bcsub($user->balance,$form->price,6);
			   $user->save();

			   $withdrawal = new Withdrawal();
			   $withdrawal->user_id = Admin::user()->id;
			   $withdrawal->user_type = DemandTraits::$col[0];
			   $withdrawal->price = request('price',0);
			   //$withdrawal->pay_id = $form->getKey();
			   $withdrawal->pay_type = WithdrawalTraits::$userType[0];
			   $withdrawal->save();

			   $form->withdrawal_id = $withdrawal->id;
			   $form->deleteInput('price');
		   });

           $form->saved(function (Form $form) {
			   $withdrawal = Withdrawal::find($form->withdrawal_id);
			   $withdrawal->pay_id = $form->getKey();
			   $withdrawal->save();
		   });
        });
    }
}