如何显示我的子类别与父子关系

问题描述

我有 category 表,它有一个 parent_id 列,有两个值:childrenparent

parent_id 为 NULL 时,它是父(类别),否则它是子(子类别)。

更多详细信息:我有一个 navigation blade,我在其中显示类别,并在下拉列表中显示子类别。我在我的刀片中扩展了它。所以当你在控制器中看到 $nav_category 变量时,它用于在导航中显示类别

当我点击一个类别并打开它的页面时,我希望能够看到它的 subcategories 但它显示了我所有的 subcategories

这是我的类别模型:

class Category extends Model
{
    use HasFactory;

    protected $fillable = [
         'parent_id','title','description','status',];

    public function parent()
    {
    return $this->belongsTo(Category::class);
    }


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

}

我的 ShowCategoryController :

 public function index($id)
    {

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


        //show categories in navigation
        $nav_categories = $parent_categories->take(7);


        //show categories details (subcategories,posts and tags)
        $show_categories = $parent_categories->find($id)->get();


        return view('home.showcategory',compact('show_categories','nav_categories'));
    }

显示类别刀片:

@extends('home.mainlayout')

@section('content')

@foreach($show_categories as $show_category)

@foreach($show_category->children as $child)
<div>
   <h2 style="text-align: center">{{ $child->title }}</h2>
</div>
@endforeach
@endforeach
@endsection

导航刀片:

 @foreach($nav_categories as $nav_category)
    <li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#"> {{ $nav_category->title }} <span class="caret"></span></a>
        <ul class="dropdown-menu" >
          @foreach($nav_category->children as $child)
             <li><a href="#">{{ $child->title }}</a></li>
          @endforeach
          <li><a href="{{ route('show_category',$nav_category->id)  }}">more</a></li>
        </ul>
      </li>
    @endforeach

和家庭控制器:

public function index()
    {

        //for show categories in nvaigation
        $nav_categories = Category::with(['children' => function($q) { $q->take(7); }])
        ->whereNull('parent_id')->get();


        return view('home.home',compact('nav_categories' ));
    }

谢谢你的帮助:)

解决方法

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