Validates_format_of before type_cast?

Rails
1

Often I need to do a one-off validation before Rails has had a chance to
convert. For example, a date. Is there a general mechanism to cause
validations to run on the raw input or do I have to resort to:

private
def validate
unless attributes_before_type_cast[‘date_of_loss’] =~
/^(\d+(-|/)){2}\d{4}/
errors.add(‘date_of_loss’, ‘use the form: mm/dd/yyyy’)
end
end

Thanks

(BTW: I know there is a date validation plugin)

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