gistfile1.txt

>> c = Currency.new
=> #<Currency id: nil, value: nil, created_at: nil, updated_at: nil>
>> c.value = "100"
=> "100"
>> c.save
=> true
>> c.reload
=> #<Currency id: 2, value: #<BigDecimal:3b73164,'0.1E3',4(8)>, created_at: "200
9-12-24 19:59:05", updated_at: "2009-12-24 19:59:05">
>> c.value = "100,01"
=> "100,01"
>> c.changes
=> {}
>> c.value
=> #<BigDecimal:3b614f0,'0.10001E3',8(12)>