Methods

Instance Public methods

attr_readonly(*attributes)

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

You can assign a new value to a readonly attribute, but it will be ignored when the record is updated.

Examples

class Post < ActiveRecord::Base
  attr_readonly :title
end

post = Post.create!(title: "Introducing Ruby on Rails!")
post.update(title: "a different title") # change to title will be ignored
📝 Source code 
# File activerecord/lib/active_record/readonly_attributes.rb, line 25
      def attr_readonly(*attributes)
        self._attr_readonly = Set.new(attributes.map(&:to_s)) + (_attr_readonly || [])
      end
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readonly_attributes()

Returns an array of all the attributes that have been specified as readonly.

📝 Source code 
# File activerecord/lib/active_record/readonly_attributes.rb, line 30
      def readonly_attributes
        _attr_readonly
      end
🔎 See on GitHub