add the root in bid modify about homework

app/controllers/bids_controller.rb

@@ -585,8 +585,9 @@ class BidsController < ApplicationController
   end
   
  def edit
-    @project_id = params[:project_id]
    @bid = Bid.find(params[:bid_id])
+   if (User.current.admin?||User.current.id==@bid.author_id)&&(@bid.homework_type == 1)
+    @project_id = params[:project_id]
     respond_to do |format|
       format.html {
         @project = Project.find(params[:project_id])
@@ -594,6 +595,9 @@ class BidsController < ApplicationController
         render :layout => 'base_courses'
       }
        end
+    else
+      render 403
+    end
   end
   
   def update