attachment download support project package

app/controllers/attachments_controller.rb

@@ -895,6 +895,8 @@ class AttachmentsController < ApplicationController
       @school = @attachment.container
     elsif @attachment.container_type == 'Library'
       @library = @attachment.container
+    elsif @attachment.container_type == 'ProjectPackage'
+      @package = @attachment.container
     else
       unless @attachment.container_type == 'Syllabus' || @attachment.container_type == 'Bid' ||  @attachment.container_type == 'Organization' || @attachment.container_type == 'HomeworkAttach' || @attachment.container_type == 'Memo' || @attachment.container_type == 'Softapplication' || @attachment.container_type == 'PhoneAppVersion' || @attachment.container_type == 'StudentWorksScore' || @attachment.container_type == 'StudentWork' || @attachment.container_type == 'Work'|| @attachment.container_type == 'ContestantWork'|| @attachment.container_type == 'Contest' || @attachment.container_type == 'HomeworkBank' || @attachment.container_type == 'Exercise' || @attachment.container_type == 'ExerciseBank' ||  @attachment.container_type == 'Career' ||  @attachment.container_type == 'EcTemplate'
         @project = @attachment.project

app/helpers/application_helper.rb

@@ -4375,6 +4375,8 @@ module ApplicationHelper
         candown = User.current.member_of_course?(attachment.container.courses.first) || (course.is_public == 1 && attachment.is_public == 1)
       elsif attachment.container_type == "Library" #教学案例允许下载
         candown = true
+      elsif attachment.container_type == "ProjectPackage" #教学案例允许下载
+        candown = true
       else
         candown = (attachment.is_public == 1 || attachment.is_public == true)
       end