课程统计信息优化

app/helpers/courses_helper.rb

@@ -751,7 +751,7 @@ module CoursesHelper
   #加入课程、退出课程按钮
   def join_in_course_header(course, user, options=[])
     if user.logged?
-      joined = course.members.map{|member| member.user_id}.include? user.id
+      joined = course.members.includes(:user).map{|member| member.user_id}.include? user.id
       text = joined ? l(:label_course_exit_student) : l(:label_course_join_student)
       url = joined ? join_path(:object_id => course.id) : try_join_path(:object_id => course.id)
       method = joined ? 'delete' : 'post'

app/views/layouts/_project_info.html.erb

@@ -1,6 +1,6 @@
 <% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,@course)) %>
-<% teacher_num = TeacherAndAssistantCount(@course) %>
+<% teacher_num = 0 %>
-<% student_num = studentCount(@course) %>
+<% student_num = 0 %>
 <div class="pr_info_logo fl mr10 mb5">
   <% if is_excellent_course(@course) %>
     <img src="/images/course/boutique.png" width="50" height="auto" alt="精品" class="boutiqueP" />