diff --git a/app/controllers/files_controller.rb b/app/controllers/files_controller.rb
index a8ba3d426..e619ef843 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -40,7 +40,19 @@ class FilesController < ApplicationController
       render :layout => !request.xhr?
     elsif params[:course_id]
       @isproject = false
-      @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.created_on DESC").find(@course.id)]
+
+      if params[:sort]
+        @oder =  params[:sort].split(",")[0]
+        @order_by = @oder.split(":")[0]
+        @order_tyoe = @oder.split(":")[1]
+        if @order_by == "size"
+          @order_by = "filesize"
+        end
+        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.#{@order_by} #{@order_tyoe}").find(@course.id)]
+      else
+        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.created_on DESC").find(@course.id)]
+      end
+
       render :layout => 'base_courses'
     end
   end
diff --git a/app/helpers/project_score_helper.rb b/app/helpers/project_score_helper.rb
index 3df2e05b5..fe7c8307e 100644
--- a/app/helpers/project_score_helper.rb
+++ b/app/helpers/project_score_helper.rb
@@ -2,7 +2,12 @@
 class ProjectScoreHelper
   #缺陷数量
   def issue_num project
+    project.issues.count
+  end
 
+  #缺陷留言数量
+  def issue_journal_num project
+     project
   end
 
 end
\ No newline at end of file
diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 85f36fc5f..67e46eb5e 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -193,7 +193,7 @@ class Attachment < ActiveRecord::Base
   def show_suffix_type
     suffix = 'other'
     temp = self.suffix_type.downcase
-    if self.attachmentstype.suffixArr.include?(temp)
+    if self.attachmentstype && self.attachmentstype.suffixArr.include?(temp)
       suffix = temp
     end
     suffix
diff --git a/app/views/files/_course_show_all_attachment.html.erb b/app/views/files/_course_show_all_attachment.html.erb
index f94ddc20b..abece1ae1 100644
--- a/app/views/files/_course_show_all_attachment.html.erb
+++ b/app/views/files/_course_show_all_attachment.html.erb
@@ -43,7 +43,7 @@
             <!-- <td class="created_on"><%#= format_time(file.created_on) %></td> -->
             <td class="filesize"><%= number_to_human_size(file.filesize) %></td>
             <td class="attach_type">
-              <span id="attach_type_id_label<%= file.id %>" style="white-space:nowrap;"><%= file.attachmentstype.typeName %></span>
+              <span id="attach_type_id_label<%= file.id %>" style="white-space:nowrap;"><%= file.attachmentstype.typeName unless file.attachmentstype.nil? %></span>
               <span id="attach_type_id_edit<%= file.id %>" style="white-space:nowrap;">
                 <%= render :partial => 'attachments/course_type_edit', :locals => {:attachmenttypes => attachmenttypes, :attachment => file, :contentype => selContentType} %>
               </span>