gistfile1.txt

#!ruby
require 'rubygems'
require 'dm-core'

DataMapper::Logger.new(STDOUT, :debug)
DataMapper.setup(:default, "mysql://root:password@localhost/db_testing")

class Car
  include DataMapper::Resource
  
  property :id, Serial
  property :miles, BigDecimal, :scale => 2, :precision => 14
end

Car.auto_migrate!

a = Car.new
a.miles = 50.5
a.save

p Car.all(:miles => 50.5) #=> [], should not be empty 
p Car.all(:conditions => ['miles = ?', 50.5]) #=> [#<Car @id=1 @miles=#<BigDecimal:1237bd8,'0.505E2',8(8)>>]
p Car.all(:conditions => ['miles = ?', 50.5]) == Car.all(:miles => 50.5) #=> false, should be true