laravel 5.4中实现无限级分类的方法示例

php artisan make:migration create_category_table --create=category

<?php use Illuminate/Support/Facades/Schema;use Illuminate/Database/Schema/Blueprint;use Illuminate/Database/Migrations/Migration; class CreateCategoryTable extends Migration{ /** * Run the migrations. * * @return void */ public function up() { Schema::create('categorys', function (Blueprint $table) {  $table->increments('id');  $table->integer('parent_id');  $table->string('code');  $table->string('name');  $table->string('path');  $table->timestamps(); }); }  /** * Reverse the migrations. * * @return void */ public function down() { Schema::dropIfExists('categorys'); }}php artisan migrate

php artisan make: model Category -m

<?php namespace App; use Illuminate/Database/Eloquent/Model; class Category extends Model{ public function childCategory() { return $this->hasMany('App/Category', 'parent_id', 'id'); }  public function allChildrenCategorys() { return $this->childCategory()->with('allChildrenCategorys'); }}

$categorys = App/Category::with('allChildrenCategorys')->first();

$categorys->allChildrenCategorys; 

$categorys->allChildrenCategorys->first()->allChildrenCategorys;