Yii2 限制在ActiveDataProvider中不起作用
我正在使用以下代码,而Yii2 限制在ActiveDataProvider中不起作用,yii2,yii2-advanced-app,yii2-basic-app,Yii2,Yii2 Advanced App,Yii2 Basic App,我正在使用以下代码,而限制不起作用。但是如果我看到命令,它会显示limit,但是当我将查询传递到ActiveDataProvider时,它会获取所有记录: $data= User::find()->where(['category_id'=> 5])->orderBy(['rand()' => SORT_DESC])->limit(4); $command = $data->createCommand(); $data2 = $comman
限制
不起作用。但是如果我看到命令,它会显示limit
,但是当我将查询传递到ActiveDataProvider
时,它会获取所有记录:
$data= User::find()->where(['category_id'=> 5])->orderBy(['rand()' => SORT_DESC])->limit(4);
$command = $data->createCommand();
$data2 = $command->queryAll();// This works fine and fetch only 4 data
$dataProvider = new ActiveDataProvider([
'query' => $data,
]); // But this displays all data without limit
我在这里做错了什么?以下是在
yii\data\ActiveDataProvider
中准备模型时发生的情况:
/**
* @inheritdoc
*/
protected function prepareModels()
{
if (!$this->query instanceof QueryInterface) {
throw new InvalidConfigException('The "query" property must be an instance of a class that implements the QueryInterface e.g. yii\db\Query or its subclasses.');
}
$query = clone $this->query;
if (($pagination = $this->getPagination()) !== false) {
$pagination->totalCount = $this->getTotalCount();
$query->limit($pagination->getLimit())->offset($pagination->getOffset());
}
if (($sort = $this->getSort()) !== false) {
$query->addOrderBy($sort->getOrders());
}
return $query->all($this->db);
}
我们对这一部分感兴趣:
if (($pagination = $this->getPagination()) !== false) {
$pagination->totalCount = $this->getTotalCount();
$query->limit($pagination->getLimit())->offset($pagination->getOffset());
}
因此,您可以看到,如果分页不是false
,则会自动管理限制
您只需将分页设置为false
,然后手动设置限制即可:
$dataProvider = new ActiveDataProvider([
'query' => $query,
'pagination' => false,
]);
您可以在ActiveDataProvider中使用Limit并保持分页,如下所示:-
$dataProvider = new ActiveDataProvider([
'query' => $query,
'pagination' => [
'pageSize' => 50,
],
]);
$dataProvider->setTotalCount(1000);
这将使$This->getTotalCount()=1000
并保持分页。
去看看更多的参考资料