我有这样的验证结构：
validates :upload_file_name, :presence => true,
:format =>{:with => %r{\.(jpg)$}i,:message =>"should have an extension .jpg"}
validates_uniqueness_of :upload_file_name, :message => "is already in the database"
当我输入 rails 控制台时，我得到以下答案
> s.errors.full_messages
=> ["Upload file name is already in the database"]
我需要消息只是“已经在数据库中”而没有“上传文件名”我该怎么做？这个问题的第二个解决方案对我没有帮助，因为我收到了一个错误：
en:
activerecord:
errors:
full_messages:
format:"%{attribute} %{message}"
1.9.3-p286 :002 > s.save()
(0.2ms) begin transaction
Upload Exists (0.3ms) SELECT 1 AS one FROM "uploads" WHERE "uploads"."upload_file_name" = 'Katja.jpg' LIMIT 1
(0.3ms) rollback transaction
Psych::SyntaxError: (/home/katja/Desktop/tors-jquery-fileupload-rails-paperclip-example-b0b9934/config/locales/en.yml): found character that cannot start any token while scanning for the next token at line 6 column 1
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:203:in `parse'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:203:in `parse_stream'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:151:in `parse'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:127:in `load'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:297:in `block in load_file'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:297:in `open'
from /home/katja/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/psych.rb:297:in `load_file'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:171:in `load_yml'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:157:in `load_file'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:15:in `block in load_translations'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:15:in `each'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:15:in `load_translations'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/simple.rb:57:in `init_translations'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/simple.rb:71:in `lookup'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n/backend/base.rb:26:in `translate'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/i18n-0.6.0/lib/i18n.rb:156:in `block in translate'
... 25 levels...
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/validations.rb:50:in `save'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/attribute_methods/dirty.rb:22:in `save'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:241:in `block (2 levels) in save'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:295:in `block in with_transaction_returning_status'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:208:in `transaction'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:293:in `with_transaction_returning_status'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:241:in `block in save'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:252:in `rollback_active_record_state!'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.6/lib/active_record/transactions.rb:240:in `save'
from (irb):2
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/railties-3.2.6/lib/rails/commands/console.rb:47:in `start'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/railties-3.2.6/lib/rails/commands/console.rb:8:in `start'
from /home/katja/.rvm/gems/ruby-1.9.3-p286/gems/railties-3.2.6/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
提前致谢。