BigDecimal value 0.0, converted to 1080.0 !!!

[ledowong]

class Bar < ActiveRecord::Base
  serialize :foo
  # serialize :foo, Hash <--- add Hash not make any different
end

hash = {a: 0.0.to_d} # Decimal
bar = Bar.new
bar.foo = hash
bar.foo  #<-------- it return {":a"=>1080.0} OMG

Need to add
SafeYAML::OPTIONS[:whitelisted_tags] = ["!ruby/object:BigDecimal"]

Anyway, this year 2014 gem really useful nowadays?