【laralve项目】@12 商品分类--观察者模式--单元测试--处理无极限分类(2)

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
/**
 * 商品分类
 */
class GoodsCategory extends Model
{
    protected  $fillable = ['name', 'category_image'];
    public function parent()
    {
        //反向关联
        return $this->belongsTo(GoodsCategory::class);
    }
    public function children() {
        //一对多
        return $this->hasMany(GoodsCategory::class, 'parent_id');
    }
    //定义一个访问器，获取所有祖先类目的ID值
    public function getPossessIdsAttribute()
    {
        //array_filter 将数组中的空值移除
        return array_filter(explode('-', trim($this->possess, '-')));
    }
    //定义一个访问器，获取祖先类目并按层级排序
    public function getAncestorsAttribute()
    {
        return GoodsCategory::query()
            ->whereIn('id', $this->possess_ids)
            //按层级排序
            ->orderBy('level')->get();
    }
    //定义一个访问器，获取以 - 为分隔的所有祖先类目的名称以及当前类目的名称
    public function getFullNameAttribute()
    {
        return $this->ancestors //获取所有祖先类
            ->pluck('name') //获取祖先类目的name 字段为一个数组
            ->push($this->name)//获取当前类目的 name 字段加到数组的末尾
            ->implode(' - '); //用 - 符合将数组的值组成一个字符串
    }
    // public function getLevelAttribute($value) {
    //     $data = [
    //         '0' => '根目录',
    //         '1' => '二级',
    //         '2' => '三级',
    //     ];
    //     return (is_null($value)) ? $data : $data[$value];
    // }
    /**
     * 测试方法
     * @return [type] [description]
     */
    public function test() {
        $category = GoodsCategory::where('id', 10)->first();
        $data = $category->ancestors->toArray();
        return $data;
    }
}

<?php
use App\Models\GoodsCategory;
use Illuminate\Database\Seeder;
class GoodsCategoryTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $categories = [
            [
                'name'     => '手机配件',
                'sort'     => '0',
                'children' => [
                    [
                        'name'     => '手机壳',
                        'sort'     => '0',
                        'children' => [
                            [
                                'name' => '华为V10手机',
                                'sort'     => '0',
                            ],
                            [
                                'name' => '小米',
                                'sort'     => '1',
                            ],
                        ],
                    ],
                    [
                        'name'     => '数据线',
                        'sort'     => '4',
                        'children' => [
                            [
                                'name' => '苹果数据线',
                                'sort'     => '0',
                            ],
                            [
                                'name' => '安卓数据线',
                                'sort'     => '1',
                            ],
                        ],
                    ],
                    [
                        'name'     => '耳机',
                        'sort'     => '0',
                        'children' => [
                            [
                                'name' => '有线耳机',
                                'sort'     => '1',
                            ],
                            [
                                'name' => '蓝牙耳机',
                                'sort'     => '0',
                            ],
                        ],
                    ],
                ],
            ],
            [
                'name'     => '六星果园',
                'sort'     => '0',
                'children' => [
                    [
                        'name'     => '国产水果',
                        'sort'     => '0',
                        'children' => [
                            [
                                'name' => '苹果',
                                'sort'     => '0',
                            ],
                            [
                                'name' => '梨',
                                'sort'     => '1',
                            ],
                        ],
                    ],
                ]
            ]
        ];
        foreach ($categories as $data) {
            $this->createCategory($data);
        }
    }
    public function createCategory($data, $parent = null)
    {
        // 创建一个分类
        $category = new GoodsCategory([
            'name' => $data['name'],
            'sort' => $data['sort'],
        ]);
        // 如果有父级参数，代表有父类目
        if (!is_null($parent)) {
            // 将模型实例与给定的父实例关联。
            $category->parent()->associate($parent);
        }
        // 保存到数据库
        $category->save();
        // 如果有children字段并且 children字段是一个数组
        if (isset($data['children']) && is_array($data['children'])) {
            foreach ($data['children'] as $child) {
                $this->createCategory($child, $category);
            }
        }
    }
}