如何在laravel中通過另一個表列更新自動更新一個表列

Question

我有一個帶有余額列的 WALLET 表，並且我有一個帶有價格列的 PAYMENT 表我想在更新 PAYMENT PRICE 列或創建 NEW PAYMENT 時自動更新 WALLET BALANCE 列。 我應該怎么辦？

Answer 1

在 laravel 中你可以使用Observers ，請看這個

觀察者代碼示例：

<?php

namespace App\Observers;

use App\Models\Payment;

class PaymentObserver
{
    public function created(Payment $payment)
    {
        $wallet = $payment->wallet;
        $wallet->balance = $payment->price;
        $wallet->save();
    }

    public function updated(Payment $payment)
    {
        if($payment->wasChanged('price')){
            $wallet = $payment->wallet;
            $wallet->balance = $payment->price;
            $wallet->save();
        }
        
    }
}