DcatAdmin开发集锦（1）：使用模型树

1、创建category表（必须有parent_id id title order show）字段

CREATE TABLE IF NOT EXISTS `category` (
  `id` bigint(20) unsigned NOT NULL,
  `parent_id` bigint(20) NOT NULL DEFAULT '0',
  `order` int(11) NOT NULL DEFAULT '0',
  `title` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
  `show` tinyint(4) NOT NULL DEFAULT '1',
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

2、CategoryController.php中

namespace App\Admin\Controllers;

use App\Models\Category;
use Dcat\Admin\Form;
use Dcat\Admin\Grid;
use Dcat\Admin\Show;
use Dcat\Admin\Layout\Column;
use Dcat\Admin\Layout\Content;
use Dcat\Admin\Layout\Row;
use Dcat\Admin\Tree;
use Dcat\Admin\Widgets\Box;
use Dcat\Admin\Http\Actions\Menu\Visiable;
use Dcat\Admin\Http\Controllers\AdminController;
use Dcat\Admin\Widgets\Form as WidgetForm;

class CategoryController extends AdminController
{
    public function index(Content $content)
    {
        return $content
            ->title(trans('admin.category'))
            ->description(trans('admin.list'))
            ->body(function (Row $row) {
                $row->column(7, $this->treeView()->render());

                $row->column(5, function (Column $column) {
                    $form = new WidgetForm();
                    $form->action(admin_url('category'));

                    
                   
                    $form->select('parent_id', trans('admin.parent_id'))->options(Category::selectOptions());
                    $form->text('title', trans('admin.title'))->required();
                    $form->switch('show', trans('admin.show'))->default(1);
                   
                    $form->hidden('_token')->default(csrf_token());

                    $form->width(9, 2);

                    $column->append(Box::make(trans('admin.new'), $form));
                });
            });
    }
    
    
        public function form()
    {
        $menuModel = config('admin.database.category_model');

        //$relations = $menuModel::withPermission() ? ['permissions', 'roles'] : 'roles';

        return Form::make(new Category(), function (Form $form) use ($menuModel) {
            $form->tools(function (Form\Tools $tools) {
                $tools->disableView();
            });

            $form->display('id', 'ID');

            $form->select('parent_id', trans('admin.parent_id'))->options(function () use ($menuModel) {
                return $menuModel::selectOptions();
            })->saving(function ($v) {
                return (int) $v;
            });
            $form->text('title', trans('admin.title'))->required();
           
            $form->switch('show', trans('admin.show'));

            

            $form->display('created_at', trans('admin.created_at'));
            $form->display('updated_at', trans('admin.updated_at'));
        })->saved(function (Form $form, $result) {
            $response = $form->response()->location('category');

            if ($result) {
                return $response->success(__('admin.save_succeeded'));
            }

            return $response->info(__('admin.nothing_updated'));
        });
    }

    
    protected function treeView()
    {
    

        return new Tree(new Category(), function (Tree $tree) {
            $tree->disableCreateButton();
            $tree->disableQuickCreateButton();
            $tree->disableEditButton();
            
            $tree->actions(function (Tree\Actions $actions) {
                if ($actions->getRow()->extension) {
                    $actions->disableDelete();
                }

                $actions->prepend(new Visiable());
            });

            /*$tree->branch(function ($branch) {
                $payload = "<i class='fa {$branch['icon']}'></i> <strong>{$branch['title']}</strong>";

                if (! isset($branch['children'])) {
                    if (url()->isValidUrl($branch['uri'])) {
                        $uri = $branch['uri'];
                    } else {
                        $uri = admin_base_path($branch['uri']);
                    }

                    $payload .= "   <a href=\"$uri\" class=\"dd-nodrag\">$uri</a>";
                }

                return $payload;
            });*/
        });
    }

}