Validate presence of stdout/stdout_timing

app/models/asciicast.rb

@@ -1,8 +1,9 @@
 class Asciicast < ActiveRecord::Base
-  validates :terminal_columns, :terminal_lines, :duration, :presence => true
-
   mount_uploader :stdin, BasicUploader
   mount_uploader :stdin_timing, BasicUploader
   mount_uploader :stdout, BasicUploader
   mount_uploader :stdout_timing, BasicUploader
+
+  validates :stdout, :stdout_timing, :presence => true
+  validates :terminal_columns, :terminal_lines, :duration, :presence => true
 end