在Laravel 5中創建一個嵌套的類別列表

Question

對於Laravel來說相當新穎，我正在爲我的應用程序創建一個樹狀分類結構。這是我用過的代碼，但仍然無法實現我想要的。 我的控制器：

public function index() 
{ 
    $categories = Category::with('children')->get(); 

    return view('backend.categories.index')->with('categories', $categories); 
} 

我的類模型：

<?php 

namespace App; 

use Illuminate\Database\Eloquent\Model; 

class Category extends Model 
{ 
    protected $guarded = ['id']; 

    public function parent() 
    { 
     return $this->belongsTo('App\Category', 'parent_id'); 
    } 

    public function children() 
    { 
     return $this->hasMany('App\Category', 'parent_id'); 
    } 
} 

我的觀點：

<table class="table table-bordered table-hover"> 
       <thead> 
        <tr> 
         <th>Name</th> 
         <th>Description</th> 
         <th>Slug</th> 
         <th>Action</th> 
        </tr> 
       </thead> 
       <tbody> 
       @foreach ($categories as $category) 
        {{--@foreach ($category->children as $children)--}} 
        <tr> 
         <td>{{ $category->name }}</td> 
         <td>{{ $category->description }}</td> 
         <td>{{ $category->slug }}</td> 
         <td><a class="edit" href="{!! action('Admin\CategoriesController@edit', $category->id) !!}" title="Edit"><i class="fa fa-pencil-square-o"></a></i> <a class="delete" href="{!! action('Admin\CategoriesController@destroy', $category->id) !!}" title="Are you sure you want to delete?"><i class="fa fa-trash-o"></i></a></td> 
         @foreach ($category->children as $children) 
          <tr> 
           <td>{{ $children->name }}</td> 
           <td>{{ $children->description }}</td> 
           <td>{{ $children->slug }}</td> 
           <td></td> 
          </tr> 
         @endforeach 
        </tr> 
       </tbody> 
        {{--@endforeach--}} 
       @endforeach 
      </table> 

正在試圖製造類似下面的結構：

• 服飾
  • 袋
  • 布
• 手機
  • 片
  • 智能手機

編輯 有我的數據庫結構：

+-------------+------------------+------+-----+---------------------+----------------+ 
| Field  | Type    | Null | Key | Default    | Extra   | 
+-------------+------------------+------+-----+---------------------+----------------+ 
| id   | int(10) unsigned | NO | PRI | NULL    | auto_increment | 
| name  | varchar(255)  | NO |  | NULL    |    | 
| slug  | varchar(255)  | NO |  | NULL    |    | 
| parent_id | int(11)   | YES |  | NULL    |    | 
| description | text    | NO |  | NULL    |    | 
| created_at | timestamp  | NO |  | 0000-00-00 00:00:00 |    | 
| updated_at | timestamp  | NO |  | 0000-00-00 00:00:00 |    | 
+-------------+------------------+------+-----+---------------------+----------------+ 

Answer 1

您正在載入的所有類別（包括孩子的），然後： - <i class="fa fa-pencil-square-o"></i></a>

然後在視圖

$categories = Category::with(['children'])->get(); 

並糾正標籤：兒童喜歡這個ES循環他們。你只想加載根類別（沒有父類的類別）。爲此，請將控制器方法更改爲僅加載parent_id爲null的類別。

$categories = Category::whereNull('parent_id')->with('children')->get(); 

Answer 2

大概在模型則需要更改序指兒童模式：

public function children() 
    { 
     return $this->hasMany('App\Children', 'parent_id'); 
    } 

模型類別：

class Category extends Model 
{ 
    protected $guarded = ['id']; 
    protected $fillable = array('name','description','slug','created_at','updated_at'); 

    public function children() 
    { 
     return $this->hasMany('App\Children', 'parent_id'); 
    } 
} 

模型兒童：

class Children extends Model { 
    protected $table = 'children'; 
    protected $fillable = array('name','description','parent_id','created_at','updated_at'); 
} 

在控制器中獲取類別

@foreach ($categories as $category)    
     <ul> 
      <li>{{ $category->name }}</li> 
      <li>{{ $category->description }}</li> 
      <li>{{ $category->slug }}</li> 
      <li><a class="edit" href="{!! action('Admin\CategoriesController@edit', $category->id) !!}" title="Edit"><i class="fa fa-pencil-square-o"></i></a> <a class="delete" href="{!! action('Admin\CategoriesController@destroy', $category->id) !!}" title="Are you sure you want to delete?"><i class="fa fa-trash-o"></i></a></li> 


       @foreach ($category->children as $children) 
        <ul> 
        <li>{{ $children->name }}</li> 
        <li>{{ $children->description }}</li> 
        <li>{{ $children->slug }}</li> 
        <li></li> 
        </ul> 
       @endforeach 

     </ul> 
@endforeach