instance method
attribute_method_prefix
Ruby on Rails 5.2.8.1
Since v3.0.20Signature
attribute_method_prefix(*prefixes)Declares a method available for all attributes with the given prefix. Uses method_missing and respond_to? to rewrite the method.
#{prefix}#{attr}(*args, &block)
to
#{prefix}attribute(#{attr}, *args, &block)
An instance method #{prefix}attribute must exist and accept at least the attr argument.
class Person
include ActiveModel::AttributeMethods
attr_accessor :name
attribute_method_prefix 'clear_'
define_attribute_methods :name
private
def clear_attribute(attr)
send("#{attr}=", nil)
end
end
person = Person.new
person.name = 'Bob'
person.name # => "Bob"
person.clear_name
person.name # => nil
Parameters
-
prefixesrest
Source
# File activemodel/lib/active_model/attribute_methods.rb, line 108
def attribute_method_prefix(*prefixes)
self.attribute_method_matchers += prefixes.map! { |prefix| AttributeMethodMatcher.new prefix: prefix }
undefine_attribute_methods
end
Defined in activemodel/lib/active_model/attribute_methods.rb line 108
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Defined in ActiveModel::AttributeMethods::ClassMethods