diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index f518f81da..dd178a1ce 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -374,7 +374,7 @@ class StudentWorkController < ApplicationController
       end
     end
     ##################################################################################################################
-    @order,@b_sort,@name,@group = params[:order] || "score",params[:sort] || "desc",params[:name] || "",params[:group]
+    @order,@b_sort,@name,@group = params[:order] || "score",params[:sort] || "desc",params[:name].to_s.strip || "",params[:group]
     @homework_commons = @course.homework_commons.where("publish_time <= ?",Time.now.strftime("%Y-%m-%d")).order("created_at desc")
     @all_homework_commons = @course.homework_commons.order("created_at desc")
     @is_teacher = User.current.allowed_to?(:as_teacher,@course) || User.current.admin?