三级分类

app/Controller/v3/CategoryController.php

@@ -75,6 +75,6 @@ class CategoryController extends BaseController
     public function third()
     {
         $categoryId = $this->request->input('category_id');
-        return $this->success($this->categoryService->getByParentId($categoryId));
+        return $this->success($this->categoryService->getThird($categoryId));
     }
 }