Ps rails 2.3.5 ruby 1.8.7

On 7/19/10, David Kahn <[email protected]> wrote:
> Would really appreciate it if someone could tell me why this is happening:
>
> I override ssn method of AR class so I can encrypt/decrypt to/from the db:
>
> class Person < ActiveRecord::Base
>   def ssn=(value)
>     write_attribute(:borrower_ssn, Crypto.encrypt(self.encryption_key,
> value))
>     write_attribute(:borrower_ssn_final_four, value[5,4])
>   end
>
>   def ssn
>     # this begin - rescue can be removed once all data is encrypted
>     begin
>       return Crypto.decrypt(self.encryption_key,
> read_attribute(:borrower_ssn)) if read_attribute(:borrower_ssn) &&
> self.encryption_key
>     rescue
>       return read_attribute(:borrower_ssn) if read_attribute(:borrower_ssn)
> && self.encryption_key
>     end
>     nil
>   end
> end
>
> However, when I do Person.find(27) I get:
>
> #<Person id: 27, ssn: "l+IV+c55qywTjPd+bW+IGA==\n" >
>
> And then if I do p = Person.find(27), then I get the decrypted ssn.
>
> I know that find must be processing under the override methods, but I dont
> understand why, as I thought if you overrode a method it would hold in all
> situations for the AR object.
>
> David
>
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