Posted over 9 years ago. Visible to the public. Repeats. Linked content.

Rails: Overwriting default accessors

All columns of a model's database table are automagically available through accessors on the Active Record object.

When you need to specialize this behavior, you may override the default accessors (using the same name as the attribute) and simply call the original implementation with a modified value. Example:

class Poet < ApplicationRecord def name=(value) super(value.strip) end end

Note that you can also avoid the original setter and directly read/write from/to the instance's attribute storage. However this is discouraged since you may skip other behavior from other overrides. If you are absolutely sure that you must do this, you can use read_attribute(attr_name) and write_attribute(attr_name, value). Example:

class Poet < ActiveRecord::Base def name=(name) write_attribute(:name, name.strip) end end

See also

Does your version of Ruby on Rails still receive security updates?
Rails LTS provides security patches for unsupported versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2).

Owner of this card:

Dominik Schöler
Last edit:
almost 3 years ago
by Besprechungs-PC
getter, setter
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Dominik Schöler to makandra dev
This website uses short-lived cookies to improve usability.
Accept or learn more