修改合并后首页出错的问题

app/models/course.rb

@@ -34,7 +34,7 @@ class Course < ActiveRecord::Base
                      :delete_permission => :manage_files
 
   validates_presence_of :password, :term
-  validates_format_of  :class_period, :message => "class period can only digital!", :with =>/^[1-9]\d*$/
+  validates_format_of  :class_period, :message => l(:error_class_period_only_num), :with =>/^[1-9]\d*$/
 
   after_save :create_board_sync
   before_destroy :delete_all_members

app/views/layouts/base_courses.html.erb

@@ -66,7 +66,6 @@
               <tr>
                 <!-- modified by zjc 课程名称添加超链接 -->
                 <td class="info-course"><%= link_to @course.name,course_path(@course) %></td>
-                <td class="info-course"><%= @course.name %></td>
               </tr>
               <tr>
                 <td align="center">

config/locales/en.yml

@@ -186,6 +186,7 @@ en:
   notice_account_deleted: "Your account has been permanently deleted."
   notice_user_successful_create: "User %{id} created."
 
+  error_class_period_only_num: "class period can only digital"
   error_can_t_load_default_data: "Default configuration could not be loaded: %{value}"
   error_scm_not_found: "The entry or revision was not found in the repository."
   error_scm_command_failed: "An error occurred when trying to access the repository: %{value}"

config/locales/zh.yml

@@ -196,6 +196,7 @@ zh:
   
   error_complete_occupation: "请您填写工作单位，否则本系统的部分功能将无法正常使用。"
 
+  error_class_period_only_num: "课程学时只能为数字"
   error_can_t_load_default_data: "无法载入默认设置：%{value}"
   error_scm_not_found: "版本库中不存在该条目和（或）其修订版本。"
   error_scm_command_failed: "访问版本库时发生错误：%{value}"

db/migrate/20140618105213_migrate_course_students.rb

@@ -3,7 +3,7 @@ class MigrateCourseStudents < ActiveRecord::Migration
     # 原课程的学生数据迁移成新模式
     StudentsForCourse.all.each do |student|
         project = Project.find_by_id(student.course_id)
-        if project
+        if project && project.course_extra
           student.course_id = project.course_extra.id
           student.save
         end

lib/redmine/activity/fetcher.rb

@@ -105,6 +105,7 @@ module Redmine
             if event_type.to_s != 'course_journals_for_messages'
               cur_objs = provider.find_events1(event_type, @user, from, to, @options)
             end
+            if cur_objs
               cur_objs.each do |cur_obj|
                 if cur_obj.class == Issue
                   if cur_obj.project != nil && cur_obj.project.project_status != nil
@@ -115,6 +116,7 @@ module Redmine
                 end
               end
             end
+          end
           if e.count > options[:limit]
             break
           end