Make Rails table column attribute read only

Question

What is the best way to make my table column read only? disable the setter method? The column is set by postgres trigger, so I don't want to set it in the application level

Answer 1

It seems like you look for ActiveRecord::Base attr_readonly:

class Foo < ActiveRecord::Base
  attr_readonly :bar
end

foo = Foo.create(bar: "first_value")
foo.bar
=> "first_value"
foo.update(bar: "second_value") #column `bar` ignored in SQL query
foo.bar
=> "first_value"