1.配置路由
~~~
Route::get('api/:version/category/all','api/:version.Category/getAllCategories');
~~~
2.新建Category.php模型
~~~
<?php
namespace app\api\model;
class Category extends BaseModel
{
public function products()
{
return $this->hasMany('Product', 'category_id', 'id');
}
public function img()
{
return $this->belongsTo('Image', 'topic_img_id', 'id');
}
public static function getCategories($ids)
{
$categories = self::with('products')
->with('products.img')
->select($ids);
return $categories;
}
public static function getCategory($id)
{
$category = self::with('products')
->with('products.img')
->find($id);
return $category;
}
}
~~~
3.新建异常类CategoryException.php
~~~
<?php
namespace app\lib\exception;
class CategoryException extends BaseException
{
public $code = 404;
public $msg = '指定类目不存在，请检查商品ID';
public $errorCode = 20000;
}
~~~
4.新建控制器类Category .php
~~~
<?php
namespace app\api\controller\v1;
use app\api\model\Category as CategoryModel;
use app\lib\exception\CategoryException;
use think\Controller;
class Category extends Controller
{
//获取全部类目列表，但不包含类目下的商品
public function getAllCategories()
{
$categories = CategoryModel::all([], 'img');
if(empty($categories)){
/*throw new MissException([
'msg' => '还没有任何类目',
'errorCode' => 50000
]);*/
throw new CategoryException();
}
return $categories;
}
}
~~~
结果
