Namespace
Methods
R
W
Constants
WriterMethodCache = Class.new(AttributeMethodCache) { private def method_body(method_name, const_name) <<-EOMETHOD def #{method_name}(value) name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name} write_attribute(name, value) end EOMETHOD end }.new
 
Instance Public methods
raw_write_attribute(attr_name, value)
Alias for: write_attribute
write_attribute(attr_name, value)

Updates the attribute identified by attr_name with the specified value. Empty strings for fixnum and float columns are turned into nil.

Also aliased as: raw_write_attribute

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/write.rb, line 57
def write_attribute(attr_name, value)
  attr_name = attr_name.to_s
  attr_name = self.class.primary_key if attr_name == 'id' && self.class.primary_key
  @attributes_cache.delete(attr_name)
  column = column_for_attribute(attr_name)

  # If we're dealing with a binary column, write the data to the cache
  # so we don't attempt to typecast multiple times.
  if column && column.binary?
    @attributes_cache[attr_name] = value
  end

  if column || @attributes.has_key?(attr_name)
    @attributes[attr_name] = type_cast_attribute_for_write(column, value)
  else
    raise ActiveModel::MissingAttributeError, "can't write unknown attribute `#{attr_name}'"
  end
end