作业重复提交问题

app/controllers/student_work_controller.rb

@@ -167,6 +167,12 @@ class StudentWorkController < ApplicationController
   end
 
   def create
+    # 提交作品前先判断是否已经提交
+    if hsd_committed_work?(User.current.id, @homework.id)
+      flash[:notice] = l(:notice_successful_create)
+      redirect_to edit_student_work_url(params[:student_work])
+      return
+    end
     if params[:student_work]
       @submit_result = true
       student_work = StudentWork.find(params[:student_work_id]) if params[:student_work_id]
@@ -499,6 +505,12 @@ class StudentWorkController < ApplicationController
   end
 
   private
+  def hsd_committed_work?(user, homework)
+    sw = StudentWork.where("user_id =? and homework_common_id =?", user, homework).first
+    sw.nil? ? result = false : result = true
+    result
+  end
+
   #获取作业
   def find_homework
     @homework = HomeworkCommon.find params[:homework]