Yii 对重载属性的间接修改

问题描述

$winnerBid = Bids::model()->find($criteria);

模型有下一个关系:

public function relations() {
        return array(
            'item' => array(self::BELONGS_TO, 'Goods', 'item_id'),
            'room' => array(self::BELONGS_TO, 'Rooms', 'room_id'),
            'seller' => array(self::BELONGS_TO, 'RoomPlayers', 'seller_id'),
            'buyer' => array(self::BELONGS_TO, 'RoomPlayers', 'buyer_id'),
        );
    }

当我试图保存时:

 $this->seller->current_item++;
    $this->seller->wins++;
    $this->seller->save();

我收到错误:

重载的间接修改property Bids::$seller 无效(/var/www/auction/www/protected/models/Bids.php:16)

Indirect modification of overloaded property Bids::$seller has no effect (/var/www/auction/www/protected/models/Bids.php:16)

但是在另一台服务器上一切正常吗?如何解决?或者覆盖 php 指令?有任何想法吗?TNX

推荐答案

这里的问题是 $seller 不是一个真正的"属性(Yii 通过使用魔法 __get 方法)，因此实际上您正在尝试修改函数的返回值(无效).就好像你试图这样做:

The problem here is that $seller is not a "real" property (Yii implements properties on its Models by using the magic __get method), so in effect you are trying to modify the return value of a function (which has no effect). It is as if you tried to do:

function foo() {
    return 42;
}

// INVALID CODE FOR ILLUSTRATION
(foo())++;

我不确定此行为在不同 PHP 版本上的状态，但您可以使用一个简单的解决方法:

I 'm not sure about the status of this behavior on different PHP versions, but there is an easy workaround you can use:

$seller = $this->seller;
$seller->current_item++;
$seller->wins++;
$seller->save();

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