修改学生提交作业界面的layout

app/controllers/bids_controller.rb

@@ -524,7 +524,7 @@ class BidsController < ApplicationController
         if @bid.reward_type == 3
           format.html {
             html_title(l(:label_homework_info))
-            render :layout => 'base_courses'
+            render :layout => 'base_homework'
           }
         elsif @bid.reward_type == 1
           format.html {
@@ -1061,7 +1061,6 @@ class BidsController < ApplicationController
     if params[:id]
       @bid = Bid.find(params[:id], :include => [{:homeworks => :user}])
       @user = @bid.author
-      @course = @bid.courses.first
     end
   rescue
     render_404