f访问他人个人主页不显示加入课程按钮

app/views/users/user_courses.html.erb

@@ -2,8 +2,6 @@
   <span class="<%= (@user.user_extensions.identity == 0 && @user.allowed_to?(:add_course, nil, :global => true)) ? 'top_new_bg' : 'top_newcourses_bg'%> fl"></span>
   <% if @user.user_extensions.identity == 0 && @user.allowed_to?(:add_course, nil, :global => true) %>
     <a href="<%= url_for(:controller => 'courses', :action => 'new',) %>" class="green_n_btn fr mt2" target="_blank">新建课程</a>
-  <% else %>
-    <a href="<%= join_private_courses_courses_path %>" data-remote ="true" class="green_n_btn fr mt2">加入课程</a>
   <% end %>
   <div class="cl"></div>
 </div>