laravel-admin利用ModelTree实现对分类信息的管理

摘要：根据的基本操作步骤依次完成如下操作主要是参考内置的菜单管理的功能，利用实现业务中的数据管理。

根据laravel的基本操作步骤依次完成如下操作：
主要是参考laravel-admin内置的Menu菜单管理的功能，利用ModelTree实现业务中的Tree数据管理。

</>复制代码 
1. 创建模型
    php artisan make:model Models/Category
2. 创建迁移文件
    php artisan make:migration create_categories_table
3. 创建填充文件
    php artisan make:seeder CategoriesSeeder
4. 创建后端控制器
    php artisan admin:make CategoryController --model=AppModelsCategory
5. 创建后端路由
    app/admin/routes.php ： $router->resource("/web/categories",CategoryController::class);
6. 添加后端菜单
    /web/categories：菜单路径
7. 其他定义及编辑定制

</>复制代码 
namespace AppModels;
use EncoreAdminTraitsAdminBuilder;
use EncoreAdminTraitsModelTree;
use IlluminateDatabaseEloquentModel;
class Category extends Model
{
    use ModelTree, AdminBuilder;
    //
    protected $fillable = ["name","description","order","parent_id"];
    public function __construct(array $attributes = [])
    {
        parent::__construct($attributes);
        $this->setParentColumn("parent_id");
        $this->setOrderColumn("order");
        $this->setTitleColumn("name");
    }
}

</>复制代码 
class CreateCategoriesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create("categories", function (Blueprint $table) {
            $table->increments("id");
            $table->string("name");
            $table->string("description")->nullable();
            $table->integer("order")->unsigned();
            $table->integer("parent_id")->unsigned()->nullable();
            $table->timestamps();
        });
    }
    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists("categories");
    }
}

</>复制代码 
class CategoriesSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        //
        DB::table("categories")->delete();
        for($i = 0; $i < 3; $i++ ){
            DB::table("categories")->insert(
                [
                    "name" => "CAT".$i,
                    "description" => "desc_".$i,
                    "order" => $i,
                    "parent_id" => null
                ]
            );
        }
    }
}

</>复制代码 
header($this->header);
            $content->description("类型列表");
            $content->row(function (Row $row) {
                $row->column(6, $this->treeView()->render());
                $row->column(6, function (Column $column) {
                    $form = new EncoreAdminWidgetsForm();
                    $form->action(admin_base_path("/web/categories"));
                    $form->text("name","类型名称");
                    $form->textarea("description","类型描述信息");
                    $form->number("order","排序序号");
                    $form->select("parent_id","父类名称")->options(Category::selectOptions());
                    
                    $form->hidden("_token")->default(csrf_token());
                    $column->append((new Box(trans("admin.new"), $form))->style("success"));
                });
            });
        });
    }
    protected function treeView()
    {
        return Category::tree(function (Tree $tree) {
            $tree->disableCreate();
            return $tree;
        });
    }
    
    /**
     * Edit interface.
     *
     * @param $id
     * @return Content
     */
    public function edit($id)
    {
        return Admin::content(function (Content $content) use ($id) {
            $content->header($this->header);
            $content->description("编辑类型");
            $content->body($this->form()->edit($id));
        });
    }
    /**
     * Create interface.
     *
     * @return Content
     */
    public function create()
    {
        return Admin::content(function (Content $content) {
            $content->header($this->header);
            $content->description("添加类型");
            $content->body($this->form());
        });
    }
    /**
     * Make a form builder.
     *
     * @return Form
     */
    protected function form()
    {
        return Admin::form(Category::class, function (Form $form) {
            $form->display("id", "ID");
            $form->text("name","类型名称");
            $form->textarea("description","类型描述信息");
            $form->number("order","排序序号");
            $form->select("parent_id","父类名称")->options(Category::selectOptions());
        });
    }
    public function getCategoryOptions()
    {
        return DB::table("categories")->select("id","name as text")->get();
    }
}

</>复制代码 
$router->resource("/web/categories",CategoryController::class);

具体操作略