diff --git a/app/controllers/bids_controller.rb b/app/controllers/bids_controller.rb
index 7d7861c1..aeaf19b4 100644
--- a/app/controllers/bids_controller.rb
+++ b/app/controllers/bids_controller.rb
@@ -715,13 +715,20 @@ class BidsController < ApplicationController
   end
   
   def add_homework
-    # homework = HomeworkAttach.create(:bid_id => @bid.id, :user_id => User.current.id)
-    # homework.save_attachments(params[:attachments] || (params[:bid] && params[:bid][:uploads]))
-    @homework = HomeworkAttach.new
-    @homework.bid_id = @bid.id
-    @homework.user_id = User.current.id
-    @homework.save_attachments(params[:attachments])
-    @homework.save
+    if User.current.logged? && (!Member.where('user_id = ? and project_id = ?', User.current.id, @bid.courses.first.id).first.nil? && (Member.where('user_id = ? and project_id = ?', User.current.id, @bid.courses.first.id).first.roles&Role.where('id = ? or id = ? or id =?',5, 10, 7)).size >0)
+      # homework = HomeworkAttach.create(:bid_id => @bid.id, :user_id => User.current.id)
+      # homework.save_attachments(params[:attachments] || (params[:bid] && params[:bid][:uploads]))
+      @homework = HomeworkAttach.new
+      @homework.bid_id = @bid.id
+      @homework.user_id = User.current.id
+      @homework.save_attachments(params[:attachments])
+      @homework.save
+      if @homework.attachments.empty?
+        @homework.delete
+        flash[:error] = l(:no_attachmens_allowed)
+      # else
+      end
+    end
     @homework_list = @bid.homeworks
 
   end
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 0140d667..cfda02be 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -1311,6 +1311,8 @@ zh:
   button_bidding: 我要参加
   field_enterprise: '企业：'
   
+  no_attachmens_allowed: 提交作业不能为空
+  
   button_bidding_homework: 参加竞标 #huang
   field_homework_type: 提交形式    #bai
   label_homework_respond: 作业情况