laravel-admin利用ModelTree實現對分類信息的管理

根據laravel的基本操做步驟依次完成以下操做：
主要是參考laravel-admin內置的Menu菜單管理的功能，利用ModelTree實現業務中的Tree數據管理。

1. 建立模型
    php artisan make:model Models/Category
2. 建立遷移文件
    php artisan make:migration create_categories_table
3. 建立填充文件
    php artisan make:seeder CategoriesSeeder
4. 建立後端控制器
    php artisan admin:make CategoryController --model=App\Models\Category
5. 建立後端路由
    app/admin/routes.php ： $router->resource('/web/categories',CategoryController::class);
6. 添加後端菜單
    /web/categories：菜單路徑
7. 其餘定義及編輯定製

定義Model文件Category.php

namespace App\Models;

use Encore\Admin\Traits\AdminBuilder;
use Encore\Admin\Traits\ModelTree;
use Illuminate\Database\Eloquent\Model;

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');
    }
}

定義遷移

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');
    }
}

填充文件

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
                ]
            );
        }

    }
}

定義控制器

<?php

namespace App\Admin\Controllers;

use App\Models\Category;

use Encore\Admin\Form;
use Encore\Admin\Facades\Admin;
use Encore\Admin\Layout\Column;
use Encore\Admin\Layout\Content;
use App\Http\Controllers\Controller;
use Encore\Admin\Controllers\ModelForm;
use Encore\Admin\Layout\Row;
use Encore\Admin\Tree;
use Encore\Admin\Widgets\Box;
use Illuminate\Support\Facades\DB;

class CategoryController extends Controller
{
    use ModelForm;

    protected $header = '類型管理';

    /**
     * Index interface.
     *
     * @return Content
     */
    public function index()
    {
        return Admin::content(function (Content $content) {

            $content->header($this->header);
            $content->description('類型列表');

            $content->row(function (Row $row) {

                $row->column(6, $this->treeView()->render());

                $row->column(6, function (Column $column) {
                    $form = new \Encore\Admin\Widgets\Form();
                    $form->action(admin_base_path('/web/categories'));


                    $form->text('name','類型名稱');
                    $form->textarea('description','類型描述信息');
                    $form->number('order','排序序號');
                    $form->select('parent_id','父類名稱')->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('編輯類型');

            $content->body($this->form()->edit($id));
        });
    }

    /**
     * Create interface.
     *
     * @return Content
     */
    public function create()
    {
        return Admin::content(function (Content $content) {

            $content->header($this->header);
            $content->description('添加類型');

            $content->body($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','類型名稱');
            $form->textarea('description','類型描述信息');
            $form->number('order','排序序號');
            $form->select('parent_id','父類名稱')->options(Category::selectOptions());


        });
    }


    public function getCategoryOptions()
    {
        return DB::table('categories')->select('id','name as text')->get();
    }
}

添加路由

$router->resource('/web/categories',CategoryController::class);

添加後臺菜單

具體操做略