Type:
Module
Constants:
NAME_COMPILABLE_REGEXP
:
/\A[a-zA-Z_]\w*[!?=]?\z/
CALL_COMPILABLE_REGEXP
:
/\A[a-zA-Z_]\w*[!?]?\z/
Active Model Attribute Methods
Provides a way to add prefixes and suffixes to your methods as well as
handling the creation of ActiveRecord::Base-like class methods
such as table_name.
The requirements to implement ActiveModel::AttributeMethods
are to:
-
include ActiveModel::AttributeMethodsin your class. -
Call each of its method you want to add, such as
attribute_method_suffixorattribute_method_prefix. -
Call
define_attribute_methodsafter the other methods are called. -
Define the various generic
_attributemethods that you have declared. -
Define an
attributesmethod which returns a hash with each attribute name in your model as hash key and the attribute value as hash value. Hash keys must be strings.
A minimal implementation could be:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | class Person include ActiveModel::AttributeMethods attribute_method_affix prefix: 'reset_', suffix: '_to_default!' attribute_method_suffix '_contrived?' attribute_method_prefix 'clear_' define_attribute_methods :name attr_accessor :name def attributes { 'name' => @name } end private def attribute_contrived?(attr) true end def clear_attribute(attr) send("#{attr}=", nil) end def reset_attribute_to_default!(attr) send("#{attr}=", 'Default Name') endend |