此集合实例上不存在属性[species_code]

Question

我有这个雄辩的问题，我试图结合这个3表来显示视图页面上一个表中的数据。但它转向了错误。请帮我。

我是否在编码或表关系上做了任何错误？

型号：

  

TreeCategory模型

namespace App;

use Illuminate\Database\Eloquent\Model;
use App\TreeScientific;

class TreeCategory extends Model
{

protected $fillable = [

    'id',
    'code',
    'category',

];

public function scientific()
{
    return $this->hasMany('App\TreeScientific','tree_category_id');
}
}

  

TreeScientific

命名空间App;

use Illuminate\Database\Eloquent\Model;
use App\TreeCommon;

class TreeScientific extends Model
{


protected $fillable = [

    'tree_category_id',
    'species_code',
    'scientific_name',

];

public function common()
{
    return $this->hasOne('App\TreeCommon','scientific_id');
}


}

  

TreeCommons

namespace App;

use Illuminate\Database\Eloquent\Model;

class TreeCommon extends Model
{


protected $fillable = [

    'scientific_id',
    'common_name',

];


}

  

Blade.php

 <tbody>
      @foreach ($category as $kategori)
      <tr>
        <td>{{$loop -> iteration}}</td>
        <td>{{$kategori -> code}}</td>
        <td>{{$kategori -> scientific -> species_code}}</td>
        <td>{{$kategori -> scientific -> scientific_name}}</td>
        <td>{{$kategori -> scientific -> common -> common_name}}</td>

      @endforeach

  

控制器

     

使用App \ TreeCategory;       使用App \ TreeScientific;       使用App \ TreeCommon;

class PokokController extends Controller
{
    public function pokokIndex()
    {
      $category = TreeCategory::all();
      $scientific = TreeScientific::all();
      $common = TreeCommon::all();

      return view('')->with('category',$category)-
        >with('scientific',$scientific)->with('common',$common);
    }

}