Backported r9982 and r9984 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.4-stable@10000 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/attachment.rb

@@ -24,6 +24,7 @@ class Attachment < ActiveRecord::Base
   validates_presence_of :filename, :author
   validates_length_of :filename, :maximum => 255
   validates_length_of :disk_filename, :maximum => 255
+  validates_length_of :description, :maximum => 255, :allow_blank => true
   validate :validate_max_file_size
 
   acts_as_event :title => :filename,

app/views/attachments/_form.html.erb

@@ -10,7 +10,7 @@
   <span>
     <%= file_field_tag 'attachments[1][file]', :size => 30, :id => nil, :class => 'file',
           :onchange => "checkFileSize(this, #{Setting.attachment_max_size.to_i.kilobytes}, '#{escape_javascript(l(:error_attachment_too_big, :max_size => number_to_human_size(Setting.attachment_max_size.to_i.kilobytes)))}');"  -%>
-    <%= text_field_tag 'attachments[1][description]', '', :id => nil, :class => 'description', :placeholder => l(:label_optional_description) %>
+    <%= text_field_tag 'attachments[1][description]', '', :id => nil, :class => 'description', :maxlength => 255, :placeholder => l(:label_optional_description) %>
     <%= link_to_function(image_tag('delete.png'), 'removeFileField(this)', :title => (l(:button_delete))) %>
   </span>
 </span>