Laravel:执行一个查询更新,然后,如果成功,则执行下一个,否则,两者都不执行

Laravel: Do one query update and then, if that succeeds, do the next, otherwise, do neither

所以,我想用相同的值更新两个不同的用户帐户。

场景:用户 1 向用户 2 转账:

$transfer_from = $account->decrement('balance', $amount);

$transfer_to = Account::where('user_wallet_address', $receiver_wallet_address)->increment('balance', $amount);

但是,我想要的是这样的:

$account->decrement('balance', $amount)->$transfer_to;

if the decrement succeeds, then update the other user's balance, otherwise, both should fail

想法?

请使用数据库事务功能

参见下面的代码示例:

public function readRecord() {
    DB::beginTransaction();
    try {
        // put your code here in try block

         $transfer_from = $account->decrement('balance', $amount);
         $transfer_to = Account::where('user_wallet_address', $receiver_wallet_address)->increment('balance', $amount); 
        DB::commit();
    } catch (Exception $ex) {
        // If any failure case generate, it will rollback the DB operations automatically.
        DB::rollBack();
        echo $ex->getMessage() . $ex->getLine();
    }

希望对您有所帮助。在这种情况下,如果生成任何失败案例,它将自动恢复数据库易位,您无需执行任何操作。

参考URL:https://laravel.com/docs/5.7/database