在列表视图中显示JSON数据yii2

Question

我有一个问题可以在yii2的列表视图中显示JSON数据吗？

另一个问题是，这里是我的view代码

<div class="panel-group" id="accordion"> 
    <?= \yii\widgets\ListView::widget([ 
    'dataProvider' => $dataProvider, 
    'itemView' => 'listview', 
    'layout' => "{pager}\n{items}\n{pager}", 
    ]); ?> 
</div> 

这里是我的listview.php文件代码

<div data-toggle="collapse" href="#collapse'<?= $model->id ?>'" id="title" class="panel-heading ads-heading"> 
    <h4 class="panel-title"><?= $model->title ?></h4> 
    <div class="pull-right"> 
     <button type="button" id="'<?= $model->id ?>'" onclick="AdsPost(this)" 
       class="checkin-btn btn btn-xs btn-danger"> View Ads 
     </button> 
    </div> 
</div> 

这里是我的controller代码

public function actionEvent() 
{ 
    $connection=Yii::$app->db; 
    $command = $connection->createCommand("SELECT * from Advertisement where maincategory=2 AND subcategory=5"); 
    $dataReader=$command->queryAll(); // execute a query SQL 

    $dataProvider = new ActiveDataProvider([ 
     'query' => $data, 

    ]); 
    return $this->render('event' ,['dataProvider' => $dataProvider]); 
} 

我也尝试过的东西像这样，但它的工作还不如

$query = new Query(); 
    $query ->select(['*']) 
     ->from('Advertisement') 
     ->where('maincategory=1') 

    $command = $query->createCommand(); 

    $data = $command->queryAll(); 

    $dataProvider = new ActiveDataProvider([ 
     'query' => $data, 

    ]); 
    return $this->render('index' ,['dataProvider' => $dataProvider]); 

那么我在这里做错了什么？ 我问的问题来处理JSON数据以及因为如果我可以直接发送JSON数据到Listview比它使我的生活很容易

如果它太复杂，我也可以用这个来管理。

Answer 1

你可以试试两个这样

在这种firts的错误是的$数据的分配，而不是$ DataReader的

public function actionEvent() 
{ 
    $connection=Yii::$app->db; 
    $command = $connection->createCommand("SELECT * from Advertisement where maincategory=2 AND subcategory=5"); 
    $dataReader=$command->queryAll(); // execute a query SQL 

    $dataProvider = new ActiveDataProvider([ 
    'query' => $dataReader, 

    ]); 
    return $this->render('event' ,['dataProvider' => $dataProvider]); 
} 

或

$query = new Query(); 
$query->from('Advertisement') 
    ->where('maincategory = 2 and subcategory = 5'); 

$command = $query->createCommand(); 

$data = $command->queryAll(); 

$dataProvider = new ActiveDataProvider([ 
    'query' => $data, 

]); 
return $this->render('index' ,['dataProvider' => $dataProvider]);