`form_for` is bypassing model accessors. How to make it stop? (Or: How to make a custom attribute serializer?)

Question

I set these methods to automatically encrypt values.

class User < ApplicationRecord
  def name=(val)
    super val.encrypt
  end
  def name
    (super()          


        

Answer 1

Why are you exposing it as name at all ?

class User < ApplicationRecord
    def decrypted_name=(val)
       name = val.encrypt
    end

    def decrypted_name
       name.decrypt
    end
end

Then you use @model.decrypted_name instead of @model.name as name is encrypted, and such saved in DB.

edit.haml
=@user.decrypted_name
=form_for @user, html: { multipart: true } do |f|
  =f.text_field :decrypted_name

And name if it is encrypted should not be handled directly but with this decrypted_name accessor.