How to handle when the starting field value is present and an invalid param is sent

[paulcsmith]

Let's say you have an age : Int32 field.

You have a record with age as 32. You then fill out an HTML form and set age to thirty two. Avram will correctly say that this is invalid. The problem is that because it is invalid age.value will be the old value 32. I wonder what we should do? Is this correct behavior? We can't set it to "thirty two" because it is the wrong type. Maybe it should be nil? Or maybe this is just a weird edge case where there is no "correct" way to handle it

[jwoertink]

It should be set to nil, but attributes also have an original_value method. We could maybe set that just as an escape hatch deal..

attribute age : Int32
{"age" => "thirty two"}
age.value #=> nil
age.original_value #=> "thirty two"
operation.errors[:age] #=> ["wrong type or whatever"]