how to prevent a value from ever changing

rubyonrails-talk
1

problem: within the DB there is a special "empty" string, this string must never be changed.

how to best enforce this rule?

Currently I have....

2

problem: within the DB there is a special "empty" string, this string must never be changed.

how to best enforce this rule?

http://agilewebdevelopment.com/plugins/attrlocked

Or something similar to that maybe...

Currently I have....

****************************************************************** # override the string_value setter, # to control empty string from ever being overwritten # ensure that the single empty string is never modified def string_value=(sv)    if self[:string_value].blank? && !self.new_record?      raise "Empty String May Not Be Modified"

       #errors.add(:string_value, "Empty String May Not Be Modified")