上传非图片格式的不显示问题

app/controllers/organizations_controller.rb

@@ -79,8 +79,8 @@ class OrganizationsController < ApplicationController
     if @organization.show_mode == 1 && params[:org_subfield_id].nil? && params[:list] .nil?
       if @organization.is_public? || User.current.admin? || User.current.member_of_org?(@organization)
         # REDO:时间紧，暂时先这样
-        @org_logo_attchment = Attachment.where("container_id =? and container_type =? and attachtype =?", @organization, "Organization", 0).order("created_on desc").first
+        @org_logo_attchment = Attachment.find_by_sql("SELECT * from attachments WHERE container_id = #{@organization.id} and container_type = 'Organization' and attachtype = 0 and filename REGEXP '(.jpg|.png|.bmp|.gif|.jpeg)' ORDER BY created_on desc limit 1").first
-        @org_banner_attchment = Attachment.where("container_id =? and container_type =? and attachtype =?", @organization, "Organization", 1).order("created_on desc").first
+        @org_banner_attchment = Attachment.find_by_sql("SELECT * from attachments WHERE container_id = #{@organization.id} and container_type = 'Organization' and attachtype = 1 and filename REGEXP '(.jpg|.png|.bmp|.gif|.jpeg)' ORDER BY created_on desc limit 1").first
 
         @subfield_content = @organization.org_subfields.order("priority")
         @organization = Organization.find(params[:id])