修复：排序字段

app/controllers/project_categories_controller.rb

@@ -10,7 +10,7 @@ class ProjectCategoriesController < ApplicationController
   end
 
   def group_list
-    @project_categories = ProjectCategory.select("id, name, projects_count, private_projects_count, (projects_count - private_projects_count) as public_projects_count").having('public_projects_count > 0').order(projects_count: :desc)
+    @project_categories = ProjectCategory.select("id, name, projects_count, private_projects_count, (projects_count - private_projects_count) as public_projects_count").having('public_projects_count > 0').order(public_projects_count: :desc)
     # projects = Project.no_anomory_projects.visible
     # @category_group_list = projects.joins(:project_category).group("project_categories.id", "project_categories.name").size
   end