调整

app/controllers/graduation_tasks_controller.rb

@@ -509,7 +509,7 @@ class GraduationTasksController < ApplicationController
     @course_groups = @course.course_groups.where(id: group_ids)
 
     # 如果传了分班id则取合集
-    group_ids = group_ids & params[:group_ids] unless params[:group_ids].blank?
+    group_ids = group_ids & params[:group_ids].map(&:to_i) unless params[:group_ids].blank?
     page = params[:page] ? params[:page].to_i : 1
     limit = params[:limit] ? params[:limit].to_i : 10
     @work_list = @task.graduation_works.joins("join course_members on graduation_works.user_id=course_members.user_id").