ActiveRecord::AttributeMethods::Read
Namespace
Methods
#
R
Instance Public methods
_read_attribute(attr_name, &block)

This form is significantly faster on JRuby, and this is one of our biggest hotspots. github.com/jruby/jruby/pull/2562

Also aliased as: attribute

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/read.rb, line 66
def _read_attribute(attr_name, &block) # :nodoc
  @attributes.fetch_value(attr_name.to_s, &block)
end
read_attribute(attr_name, &block)

Returns the value of the attribute identified by attr_name after it has been typecast (for example, “2004-12-12” in a date column is cast to a date object, like Date.new(2004, 12, 12)).

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/read.rb, line 50
def read_attribute(attr_name, &block)
  name = if self.class.attribute_alias?(attr_name)
    self.class.attribute_alias(attr_name).to_s
  else
    attr_name.to_s
  end

  name = self.class.primary_key if name == "id".freeze && self.class.primary_key
  _read_attribute(name, &block)
end