Rails 5 adds ignored_columns for Active Record

Sometimes we need to ignore a database column. However Rails 4.x doesn't have any officially defined method which ignores a database column from Active Record. We can apply our patch on model to ignore certain columns.

1class User < ActiveRecord::Base
2
3  # Ignoring employee_email column
4  def self.columns
5    super.reject {|column| column.name == 'employee_email'}
6  end
7
8end
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Rails 5 added ignored_columns

Rails 5 has added ignored_columns to ActiveRecord::Base class.

Here is revised code after using ignored_columns method.

1class User < ApplicationRecord
2  self.ignored_columns = %w(employee_email)
3end
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