method

attr_readonly

v5.2.3 - Show latest stable - 1 note - Class: ClassMethods

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What's this?

attr_readonly(*attributes) public

Attributes listed as readonly will be used to create a new record but update operations will ignore these fields.

# File activerecord/lib/active_record/readonly_attributes.rb, line 14
      def attr_readonly(*attributes)
        self._attr_readonly = Set.new(attributes.map(&:to_s)) + (_attr_readonly || [])
      end

September 9, 2015

1 thank

Warning: prevents persistence but doesn't prevent setting

For example:

class Widget < ActiveRecord::Base
  attr_readonly :key
end
w = Widget.create! key: 'foo'
w.update! key: 'bar'
w.key #=> 'bar'
w.reload.key #=> 'foo'

attr_readonly

Related methods

Warning: prevents persistence but doesn't prevent setting