How to override a column in Rails model?
You can override the col_a method. Use the read_attribute method to read the value in database. Something like this:
def col_a if self.read_attribute(:col_a).to_s.end_with?('0') 0 else self.read_attribute(:col_a) endend
You can simply define a method of the same name as the column. To get the actual column value, use self[column_name]. So something like this should work:
class Dummy < ActiveModel::Base def col_a self[:col_a] % 10 == 0 ? 0 : self[:col_a] endend(This assumes col_a is an integer.)
I'm a little late to the party here, but a really elegant way to do it is to simply use super
class Dummy < ApplicationRecord def col_a super % 10 === 0 ? 0 : super endend