Yii2的dataProvider使用

ArrayDataProvider may be used in the following way:

$query = new Query;
$provider = new ArrayDataProvider([
      'allModels' => $query->from('post')->all(),
      'sort' => [
          'attributes' => ['id', 'username', 'email'],
     ],
      'pagination' => [
          'pageSize' => 10,
      ],
  ]);
  // get the posts in the current page
 $posts = $provider->getModels();

 //when we change the source posts structure,then set model with them
 $modifyPosts = ModifyStruct($posts);
 $posts = $provider->setModels($modifyPosts);