班级动态只有10条，底部却显示“点击展开更多”

app/controllers/courses_controller.rb

@@ -888,23 +888,25 @@ class CoursesController < ApplicationController
     if params[:type].present?
       case params[:type]
         when "homework"
-          @course_activities = course_activities.where("course_act_type = 'HomeworkCommon'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'HomeworkCommon'").order('updated_at desc')
         when "news"
-          @course_activities = course_activities.where("course_act_type = 'News'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'News'").order('updated_at desc')
         when "message"
-          @course_activities = course_activities.where("course_act_type = 'Message'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'Message'").order('updated_at desc')
         when "poll"
-          @course_activities = course_activities.where("course_act_type = 'Poll'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'Poll'").order('updated_at desc')
         when "attachment"
-          @course_activities = course_activities.where("course_act_type = 'Attachment'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'Attachment'").order('updated_at desc')
         when "journalsForMessage"
-          @course_activities = course_activities.where("course_act_type = 'JournalsForMessage'").order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.where("course_act_type = 'JournalsForMessage'").order('updated_at desc')
         else
-          @course_activities = course_activities.order('updated_at desc').limit(10).offset(@page * 10)
+          @course_activities = course_activities.order('updated_at desc')
       end
     else
-      @course_activities = course_activities.order('updated_at desc').limit(10).offset(@page * 10)
+      @course_activities = course_activities.order('updated_at desc')
     end
+    @course_activities_count = @course_activities.count
+    @course_activities = @course_activities.limit(10).offset(@page * 10)
     @type = params[:type]
 
     @left_nav_type = 1

app/views/courses/_course_activity.html.erb

@@ -78,7 +78,7 @@
     <% end %>
 <% end %>
 
-<% if course_activities.count == 10 %>
+<% if course_activities.count + page * 10 < @course_activities_count %>
     <!--<div id="show_more_course_activities" class="loadMore mt10 f_grey">点击展开更多<%#= link_to "", course_activity_path(@course.id, :type => type, :page => page), :id => "more_course_activities_link", :remote => "true", :class => "none" %></div>-->
     <%= link_to "点击展开更多",course_activity_path(@course.id, :type => type, :page => page),:id => "show_more_course_activities",:remote => "true",:class => "loadMore mt10 f_grey"%>
 <% end %>