本文整理汇总了PHP中yii\base\Model::getOldPrimaryKey方法的典型用法代码示例。如果您正苦于以下问题：PHP Model::getOldPrimaryKey方法的具体用法？PHP Model::getOldPrimaryKey怎么用？PHP Model::getOldPrimaryKey使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类yii\base\Model的用法示例。
在下文中一共展示了Model::getOldPrimaryKey方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的PHP代码示例。
示例1: modelExists
/**
* Checks whether the $model exists in the database.
*
* @param string $targetClass the name of the ActiveRecord class that should be used to validate the uniqueness
* of the current attribute value.
* @param array $conditions conditions, compatible with [[\yii\db\Query::where()|Query::where()]] key-value format.
* @param Model $model the data model to be validated
*
* @return bool whether the model already exists
*/
private function modelExists($targetClass, $conditions, $model)
{
/** @var ActiveRecordInterface $targetClass $query */
$query = $this->prepareQuery($targetClass, $conditions);
if (!$model instanceof ActiveRecordInterface || $model->getIsNewRecord() || $model->className() !== $targetClass::className()) {
// if current $model isn't in the database yet then it's OK just to call exists()
// also there's no need to run check based on primary keys, when $targetClass is not the same as $model's class
$exists = $query->exists();
} else {
// if current $model is in the database already we can't use exists()
/** @var $models ActiveRecordInterface[] */
$models = $query->select($targetClass::primaryKey())->limit(2)->all();
$n = count($models);
if ($n === 1) {
$keys = array_keys($conditions);
$pks = $targetClass::primaryKey();
sort($keys);
sort($pks);
if ($keys === $pks) {
// primary key is modified and not unique
$exists = $model->getOldPrimaryKey() != $model->getPrimaryKey();
} else {
// non-primary key, need to exclude the current record based on PK
$exists = reset($models)->getPrimaryKey() != $model->getOldPrimaryKey();
}
} else {
$exists = $n > 1;
}
}
return $exists;
}