项目课程讨论区资源公开迁移

db/migrate/20160918074635_update_attach_public_for_message.rb

@@ -0,0 +1,13 @@
+class UpdateAttachPublicForMessage < ActiveRecord::Migration
+  def up
+    begin
+      attachments = Attachment.where(:container_type => "Message", :is_public => 0)
+      attachments.update_all(:is_public => 1)
+    rescue Exception => e
+      puts e
+    end
+  end
+
+  def down
+  end
+end