完成功能：

1、添加“新的消息”分类
2、新注册用户默认点击时间

app/controllers/users_controller.rb

@@ -106,6 +106,7 @@ class UsersController < ApplicationController
       return
     end
     # 记录当前点击按钮的时间
+    # 考虑到用户未退出刷新消息页面
     if OnclickTime.where("user_id =?", User.current).first.nil?
       message_new_time = OnclickTime.new
       message_new_time.user_id = User.current.id
@@ -132,10 +133,19 @@ class UsersController < ApplicationController
     case params[:type]
       when nil
         @message_alls = []
-        messages = MessageAll.where("user_id =?",@user).order("created_at desc")
+        messages = MessageAll.where("user_id =?" ,@user).order("created_at desc")
         messages.each do |message_all|
           @message_alls << message_all.message
         end
+      when 'unviewed'
+        @message_alls = []
+        messages = MessageAll.where("user_id =?", @user).order("created_at desc")
+        messages.each do |message_all|
+          # 在点击或者刷新消息列表后未读的消息存放在数组
+          if message_all.message.viewed == 0
+            @message_alls << message_all.message
+          end
+        end
       when 'homework'
         @message_alls = CourseMessage.where("course_message_type =? and user_id =?", "HomeworkCommon", @user).order("created_at desc")
       when 'course_message'

app/helpers/users_helper.rb

@@ -52,6 +52,15 @@ module UsersHelper
     end
   end
 
+  # 统计未读消息数
+  def unviewed_message(user)
+    course_count = CourseMessage.where("user_id =? and viewed =?", user, 0).count
+    forge_count = ForgeMessage.where("user_id =? and viewed =?", user, 0).count
+    user_feedback_count = UserFeedbackMessage.where("user_id =? and viewed =?", user, 0).count
+    user_memo_count = MemoMessage.where("user_id =? and viewed =?", user, 0).count
+    messages_count = course_count + forge_count + user_feedback_count + user_memo_count
+  end
+
   def user_mail_notification_options(user)
     user.valid_notification_options.collect {|o| [l(o.last), o.first]}
   end

app/models/user.rb

@@ -1001,8 +1001,11 @@ class User < Principal
     self.acts << Activity.new(:user_id => self.id)
   end
 
+  # 注册用户的时候消息默认点击时间为用户创建时间
   def add_onclick_time
-    self.onclick_time << OnclickTime.new(:user_id => self.id, :onclick_time => self.created_on)
+    if OnclickTime.where("user_id =?" , self.id).first.nil?
+      OnclickTime.create(:user_id => self.id, :onclick_time => self.created_on)
+    end
   end
 
   # Removes references that are not handled by associations

app/views/users/user_messages.html.erb

@@ -4,6 +4,7 @@
       <li class="resourcesSelected"><a href="javascript:void(0);" class="resourcesIcon"></a>
         <ul class="newsType">
           <li><%= link_to "全部",user_message_path(User.current), :class => "resourcesGrey" %></li>
+          <li><%= link_to "未读消息", user_message_path(User.current, :type => 'unviewed'), :class => "resourcesGrey" %></li>
           <%# 课程相关消息 %>
           <li><%= link_to "作业消息", user_message_path(User.current, :type => 'homework'), :class => "resourcesGrey" %></li>
           <li><%= link_to "课程讨论",user_message_path(User.current, :type => 'course_message'), :class => "resourcesGrey"  %></li>
@@ -22,16 +23,15 @@
           <li><%= link_to "贴吧帖子", user_message_path(User.current, :type => 'forum'), :class => "resourcesGrey"  %></li>
           <%# 系统贴吧 %>
           <li><%= link_to "用户留言",user_message_path(User.current, :type => 'user_feedback'), :class => "resourcesGrey"  %></li>
-
         </ul>
       </li>
     </ul>
   </div>
 <div class="resources mt10" id="users_setting">
 <div>
-<% if params[:type].nil? %>
+<% if params[:type].nil? || params[:type] == "unviewed" %>
     <div class="newsReadSetting">
-      有&nbsp;<span class="c_red"><%= User.current.count_new_message %></span>&nbsp;条未读<a href="javascript:void(0);" class="ml15"><%= link_to "全部设为已读", user_message_path(User.current, :viewed => 'all') %></a>
+      有&nbsp;<span class="c_red"><%= unviewed_message(@user) %></span>&nbsp;条未读<a href="javascript:void(0);" class="ml15"><%= link_to "全部设为已读", user_message_path(User.current, :viewed => 'all') %></a>
     </div>
 <% end %>
 <% if @message_alls.count >0 %>