Question

我试图在Yii2中输出相关数据。我的输出代码看起来像这样（就像我在Yii 1中那样）：

foreach ($model->comments as $key => $comment) {
    echo $comment->title;
}

但我收到错误tying to get property on a non-object，var_dump $model->comments显示数组，看起来像：

    array (size=1)
  0 => 
    object(common\models\Comment)[74]
      private '_attributes' (yii\db\BaseActiveRecord) => 
        array (size=5)
          'id' => int 1
          'title' => string 'testComment' (length=11)
          'body' => string 'body' (length=4)
          'post_id' => int 1
          'user_id' => int 1
      private '_oldAttributes' (yii\db\BaseActiveRecord) => 
        array (size=5)
          'id' => int 1
          'title' => string 'testComment' (length=11)
          'body' => string 'body' (length=4)
          'post_id' => int 1
          'user_id' => int 1
      private '_related' (yii\db\BaseActiveRecord) => 
        array (size=0)
          empty

$model->getComments()的var_dump返回ActiveQuery对象：

object(yii\db\ActiveQuery)[67]
  public 'sql' => null
  public 'on' => null
  public 'joinWith' => null
  public 'select' => null
  public 'selectOption' => null
  public 'distinct' => null
  public 'from' => null
  public 'groupBy' => null
  public 'join' => null
  public 'having' => null
  public 'union' => null
  public 'params' => 
    array (size=0)
      empty
  private '_events' (yii\base\Component) => 
    array (size=0)
      empty
  private '_behaviors' (yii\base\Component) => 
    array (size=0)
      empty
  public 'where' => null
  public 'limit' => null
  public 'offset' => null
  public 'orderBy' => null
  public 'indexBy' => null
  public 'modelClass' => string 'common\models\Comment' (length=21)
  public 'with' => null
  public 'asArray' => null
  public 'multiple' => boolean true
  public 'primaryModel' => 
    object(common\models\Post)[65]
      private '_attributes' (yii\db\BaseActiveRecord) => 
        array (size=5)
          'id' => int 1
          'header' => string 'ds' (length=2)
          'content' => string 'dsad' (length=4)
          'created' => string '0000-00-00' (length=10)
          'status' => int 1
      private '_oldAttributes' (yii\db\BaseActiveRecord) => 
        array (size=5)
          'id' => int 1
          'header' => string 'ds' (length=2)
          'content' => string 'dsad' (length=4)
          'created' => string '0000-00-00' (length=10)
          'status' => int 1
      private '_related' (yii\db\BaseActiveRecord) => 
        array (size=0)
          empty
      private '_errors' (yii\base\Model) => null
      private '_validators' (yii\base\Model) => null
      private '_scenario' (yii\base\Model) => string 'default' (length=7)
      private '_events' (yii\base\Component) => 
        array (size=0)
          empty
      private '_behaviors' (yii\base\Component) => 
        array (size=0)
          empty
  public 'link' => 
    array (size=1)
      'post_id' => string 'id' (length=2)
  public 'via' => null
  public 'inverseOf' => null

我在两种情况下都看到了我的数据，但是我如何从这些结构中接收它们？（以及$ model-＆gt; getComments（）或$ model-＆gt;评论是以什么方式进行的？）

Answer 1

希望你做得好!!! 您只需要在代码中进行小修订，如下所示

foreach ($model[0]->comments as $key => $comment) {
    echo $comment->title;
}

希望这会成为你的一天。

输出Yii2中的关系数据

1 个答案: