How does one validate a 'float' field?

rubyonrails-talk
1

I would like to validate the following conditions on a numeric field:

1) That the user did not enter a non-numeric string where he was required to enter a number. 2) That the numeric value is zero or greater.

There seems to be a conflict between these two requirements:

If the user enters a non-numeric string (e.g "ABC"), by the time it reaches the validation function within the ActiveRecord object, it has already been marshalled into a numeric format. "ABC" will be converted to zero. According to condition #2, this is an acceptable value. According to condition #1, it is not.

Is there anyway I can execute the validation methods on the raw string values, before they are "casted" into the ActiveRecord types? Otherwise, can you suggest an elegant solution for this problem?

Thanks!

Shimon Amit

2

Thank you. That is exactly what I was looking for.

Shimon Amit