diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 3c163fada..9e5886f3d 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -1374,21 +1374,21 @@ class UsersController < ApplicationController
       if User.current.id.to_i == params[:id].to_i
         user_course_ids = User.current.courses.map { |c| c.id}  #我的资源库的话，那么应该是我上传的所有资源 加上 我加入的课程的所有资源
         @attachments = Attachment.where("(author_id = #{params[:id]} and container_type in('Project','Principal','Course','Issue','Document','Message','News','StudentWorkScore','HomewCommon')) "+
-                                            "or (container_type = 'Course'  and container_id in (#{user_course_ids.join(',')}))").order("created_on desc")
+                                            "or (container_type = 'Course'  and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')}))").order("created_on desc")
       else
         user_course_ids = User.find(params[:id]).courses.visible.map { |c| c.id}  #Ta的资源库的话，应该是他上传的公开资源 加上 他加入的所有我可见课程里的公开资源
         @attachments = Attachment.where("(author_id = #{params[:id]} and is_public = 1 " +
                                             "and container_type in('Project','Principal','Course','Issue','Document','Message','News','StudentWorkScore','HomewCommon')) " +
-                                            "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.join(',')}))").order("created_on desc")
+                                            "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')}))").order("created_on desc")
       end
     elsif params[:type] == "2" #课程资源
       if User.current.id.to_i == params[:id].to_i
         user_course_ids = User.current.courses.map { |c| c.id}
-        @attachments = Attachment.where("(author_id = #{params[:id]} and container_type = 'Course') or (container_type = 'Course'  and container_id in (#{user_course_ids.join(',')})) ").order("created_on desc")
+        @attachments = Attachment.where("(author_id = #{params[:id]} and container_type = 'Course') or (container_type = 'Course'  and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')})) ").order("created_on desc")
       else
         user_course_ids = User.find(params[:id]).courses.visible.map { |c| c.id}  #如果课程私有资源，那么要看这个资源的课程是不是在 这个user的所有我可见的课程中
         @attachments = Attachment.where("(author_id = #{params[:id]} and is_public = 1 and container_type = 'Course')"+
-                                            "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.join(',')}))").order("created_on desc")
+                                            "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')}))").order("created_on desc")
       end
     elsif params[:type] == "3" #项目资源
       if User.current.id.to_i == params[:id].to_i
@@ -1424,22 +1424,22 @@ class UsersController < ApplicationController
       if User.current.id.to_i == params[:id].to_i
         user_course_ids = User.current.courses.map { |c| c.id}  #我的资源库的话，那么应该是我上传的所有资源 加上 我加入的课程的所有资源 取交集并查询
         @attachments = Attachment.where("((author_id = #{params[:id]} and container_type in('Project','Principal','Course','Issue','Document','Message','News','StudentWorkScore','HomewCommon')) "+
-                                            " or (container_type = 'Course'  and container_id in (#{user_course_ids.join(',')}))) and (filename like '%#{search}%') ").order("created_on desc")
+                                            " or (container_type = 'Course'  and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')}))) and (filename like '%#{search}%') ").order("created_on desc")
       else
         user_course_ids = User.find(params[:id]).courses.visible.map { |c| c.id}  #如果课程私有资源，那么要看这个资源的课程是不是在 这个user的所有我可见的课程中
         @attachments = Attachment.where("((author_id = #{params[:id]} and is_public = 1 and container_type in" +
          " ('Project','Principal','Course','Issue','Document','Message','News','StudentWorkScore','HomewCommon'))"+
-         " or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.join(',')})) )" +
+         " or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')})) )" +
          " and (filename like '%#{search}%') ").order("created_on desc")
       end
     elsif params[:type] == "2" #课程资源
       if User.current.id.to_i == params[:id].to_i
         user_course_ids = User.current.courses.map { |c| c.id}
-        @attachments = Attachment.where("(author_id = #{params[:id]} and container_type = 'Course') or (container_type = 'Course'  and container_id in (#{user_course_ids.join(',')})) ").order("created_on desc")
+        @attachments = Attachment.where("(author_id = #{params[:id]} and container_type = 'Course') or (container_type = 'Course'  and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')})) ").order("created_on desc")
       else
         user_course_ids = User.find(params[:id]).courses.visible.map { |c| c.id}  #如果课程私有资源，那么要看这个资源的课程是不是在 这个user的所有我可见的课程中
         @attachments = Attachment.where("((author_id = #{params[:id]} and is_public = 1 and container_type = 'Course') "+
-                                              "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.join(',')})) )"+
+                                              "or (container_type = 'Course' and is_public = 1 and container_id in (#{user_course_ids.empty? ? '0': user_course_ids.join(',')})) )"+
                                             " and (filename like '%#{search}%') ").order("created_on desc")
       end
     elsif params[:type] == "3" #项目资源