BUG修正

app/controllers/bids_controller.rb

@@ -805,6 +805,7 @@ class BidsController < ApplicationController
       @homework = @bid
       @course = Course.find_by_id(params[:course_id])
       @course_id = @course.id
+
       render file: 'courses/new_homework', layout: 'base_courses'
     end
   end

app/models/attachment.rb

@@ -129,7 +129,7 @@ class Attachment < ActiveRecord::Base
     nil
   end
 
-  def filename=(arg)
+    def filename=(arg)
     write_attribute :filename, sanitize_filename(arg.to_s)
     filename
   end

app/views/courses/new_homework.html.erb

@@ -1,6 +1,6 @@
 <h3><%=l(:label_course_new_homework)%></h3>
 
-<%= labelled_form_for @homework, :url => {:controller => 'bids', :action => 'create_homework'} do |f| %>
+<%= labelled_form_for @homework, :url => {:controller => 'bids', :action => 'create_homework',:course_id=>@course.id} do |f| %>
 <div class="box tabular">
 	<%= render :partial => 'homework_form', :locals => { :f => f } %>
 	<%= submit_tag l(:button_create), :class => "enterprise" %>