教师有权限删除课程内教辅和学生上传的资源的TAG

app/views/tags/_tag_list.html.erb

@@ -12,7 +12,7 @@
                                                :taggable_id => obj.id, :taggable_type => object_flag %> </span>
 			<% end %>
           <% when '6' %>
-          <% if obj.author_id == User.current.id || User.current.admin?%>
+          <% if obj.author_id == User.current.id || User.current.admin? || (obj.container_type == 'Course' && User.current.allowed_to?(:as_teacher,obj.course)) %>
               <% select_tag_name ||= ""%>
 		        <span class='del'> <%= link_to 'x', :controller => "tags", :action => "remove_tag_new", :remote => true, :tag_name => tag,
                                                :taggable_id => obj.id, :taggable_type => object_flag, :select_tag_name => select_tag_name %> </span>