调整

app/controllers/homework_commons_controller.rb

@@ -34,7 +34,7 @@ class HomeworkCommonsController < ApplicationController
     module_type = @homework_type == 4 ? "shixun_homework" : @homework_type == 1 ? "common_homework" : "group_homework"
     @homework_commons = @course.homework_commons.where(homework_type: @homework_type)
     @main_category = @course.course_modules.find_by(module_type: module_type)
-    if @homework_type == 4 && !params[:category].blank?
+    if !params[:category].blank?
       @category = @main_category.course_second_categories.find_by(id: params[:category])
       tip_exception("子目录id有误") if !@category.present?
       @homework_commons = @homework_commons.where(course_second_category_id: params[:category])