Declare and check for suffixed attribute methods.
Methods
Public Instance methods
Declare a method available for all attributes with the given suffix. Uses method_missing and respond_to? to rewrite the method
#{attr}#{suffix}(*args, &block)
to
attribute#{suffix}(#{attr}, *args, &block)
An attribute#{suffix} instance method must exist and accept at least the attr argument.
For example:
class Person < ActiveRecord::Base
attribute_method_suffix '_changed?'
private
def attribute_changed?(attr)
...
end
end
person = Person.find(1)
person.name_changed? # => false
person.name = 'Hubert'
person.name_changed? # => true
[ show source ]
# File vendor/rails/activerecord/lib/active_record/attribute_methods.rb, line 35
35: def attribute_method_suffix(*suffixes)
36: attribute_method_suffixes.concat suffixes
37: rebuild_attribute_method_regexp
38: end
Returns MatchData if method_name is an attribute method.
[ show source ]
# File vendor/rails/activerecord/lib/active_record/attribute_methods.rb, line 41
41: def match_attribute_method?(method_name)
42: rebuild_attribute_method_regexp unless defined?(@@attribute_method_regexp) && @@attribute_method_regexp
43: @@attribute_method_regexp.match(method_name)
44: end