Bài 29: lấy dữ liệu cho danh mục sản phẩm

  

-    Vào dự án frontend chạy lệnh :     php artisan make:model Category

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Category extends Model
{
    use SoftDeletes;
    protected $table = 'categories';

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

-    Vào HomeController.php

<?php

namespace App\Http\Controllers;

use App\Category;
use App\Slider;
use Illuminate\Http\Request;

class HomeController extends Controller
{
    public function index()
    {
        $sliders = Slider::latest()->get();
        $categorys = Category::where('parent_id', 0)->latest()->get();
        return view('home.home',compact('sliders','categorys'));
    }
    public function test()
    {
        return view('test');
    }
}

-    Vào siderbar.blade.php

<div class="col-sm-3">
    <div class="left-sidebar">
        <h2>Category</h2>
        <div class="panel-group category-products" id="accordian"><!--category-productsr-->
            @foreach($categorys as $category)
            <div class="panel panel-default">
                <div class="panel-heading">
                    <h4 class="panel-title">
                        <a data-toggle="collapse" data-parent="#accordian" href="#sportswear_{{$category->id}}">
                            <span class="badge pull-right">
                                @if($category->categoryChildrent->count())
                                    <i class="fa fa-plus"></i>
                                @endif
                            </span>
                            {{$category->name}}
                        </a>
                    </h4>
                </div>
                <div id="sportswear_{{$category->id}}" class="panel-collapse collapse">
                    <div class="panel-body">
                        <ul>
                            @foreach($category->categoryChildrent as $categoryChilrent)
                            <li><a href="#">{{$categoryChilrent->name}} </a></li>
                            @endforeach
                        </ul>
                    </div>
                </div>
            </div>
            @endforeach
        </div><!--/category-products-->

    </div>
</div>

-    Kết quả :

-    Giải thích: kiểm tra nếu có những mục con mới hiện nút +

@if($category->categoryChildrent->count())
                                    <i class="fa fa-plus"></i>
                                @endif