Question

我无法使用Yii创建以下查询：

SELECT recipientId as broadcasterId, SUM(quantity) as quantity FROM `creditlog` 
WHERE websiteId=3 AND timeAdded>='2013-01-17' 
AND timeAdded<='2013-02-17' 
AND recipientId IN (10000024, 10000026, 1000028) GROUP BY `recipientId`

我试过了：

$command = Yii::app()->db->createCommand();
$command->select('recipientId as broadcasterId, SUM(quantity) as quantity');
$command->from('creditlog');

$command->where('websiteId=:websiteId AND timeAdded>=:dateStart AND timeAdded<=:dateEnd AND recipientId IN (:recipients)',array(':websiteId' => $websiteId, ':dateStart' => $dateStart, ':dateEnd' => $dateEnd, ':recipients' => $broadcasterIds));

$command->group('recipientId');

此外，文档中的andWhere()函数似乎也缺失了。

问题在于IN条件，但我无法找到重写它的方法。

Answer 1

由于您无权访问andWhere，这会让生活更加简单，您必须使用where来表达参数：

$command->where(array(
    array('and', 
          'websiteId=:websiteId',
          array('and', 
                'timeAdded>=:dateStart',
                 array('and',
                       // ...

), $parameters);

这样做是为了让您可以在某个时候使用正确的array('in', 'recipientId', $values)语法来生成IN(...) SQL。

然而，这很丑陋且难以管理。只要将所有条件简单地与AND连接在一起，就可以从这样的更健全的数据表示中以编程方式构造数据结构（实际上这是缺少andWhere的解决方法）：

$conditions = array(
    'websiteId=:websiteId',
    'timeAdded>=:dateStart',
    'timeAdded<=:dateEnd',
    array('in', 'recipientId', $broadcasterIds),

);

$where = null;
foreach ($conditions as $condition) {
    if (!$where) {
        $where = $condition;
    }
    else {
        $where = array('and', $where, $condition);
    }
}

$command->where($where, $parameters);

有关为何必须使用这种表达方式的更多信息，请参阅CDbCommand::where的文档。

Yii CDbCommand创建查询

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