遍历关系 Laravel

Question

计算器，

我想完成的事情：

我想循环遍历数据库以查找所有（英雄）及其相关（采访）。我还想将每个采访都与其相关的（故事）和（图像）拉出来。到目前为止，我可以 dd($heroes) 并且我可以看到数组正确地抓住了每个英雄的采访，并且每个采访都有相关的图像和故事。我该如何正确循环？

错误

Invalid argument supplied for foreach() (View: /Users/plastics1509moore/Desktop/elephant_gin/resources/views/administration/index.blade.php)

这是我所做的：

控制器：

$heroes = Hero::with('Interview', 'Interview.stories', 'Interview.images')->orderBy('position', 'asc')->get();

模型关系：

英雄：

public function Interview()
{
    return $this->hasOne('App\Interview', 'heroInt_id');
}

采访：

    public function relationships()
{
    return $this->belongsTo('App\Hero');
}
public function stories()
{
    return $this->hasMany('App\InterviewStory');
}
public function images()
{
    return $this->hasMany('App\InterviewImage');
}

采访图片：

 public function relationships()
{
    return $this->belongsTo('App\Interview');
}

采访故事

public function relationships()
{
    return $this->belongsTo('App\Interview');
}

Html:

循环：

    @foreach($heroes as $hero)
       @foreach($hero->Interview as $story)
         <div>{{$story->id}}</div>
        @endforeach    
    @endforeach

Answer 1

我认为你的问题是因为没有关注 laravel "assumes"。在文档中：

Additionally, Eloquent assumes that the foreign key should have a value matching the id column of the parent. In other words, Eloquent will look for the value of the user's id column in the user_id column of the Phone record. If you would like the relationship to use a value other than id, you may pass a third argument to the hasOne method specifying your custom key:

return $this->hasOne('App\Phone', 'foreign_key', 'local_key');

Hero的id是多少？如果它不同于 id，那么您必须添加 local_key 名称。

Answer 2

您不能循环采访，因为这是 hasOne 关系。你可能想要做的是

@foreach($heroes as $hero)
   @foreach($hero->interview->stories as $story)
     <div>{{$story->id}}</div>
    @endforeach    
@endforeach

遍历关系 Laravel

Loop through relationships Laravel

foreach

relationship

laravel