rails 自定义配置

time formate 

Time::DATE_FORMATS[:month_and_year] = "%B %Y"
Time::DATE_FORMATS[:short_ordinal] = lambda { |time| time.strftime("%B #{time.day.ordinalize}") }

error_messages 

   ActionView::Base.field_error_proc = Proc.new{ |html_tag, instance| html_tag }

在rails3中要加html_safe