instance method
attribute_method_prefix
Ruby on Rails edge
Since v3.0.20Signature
attribute_method_prefix(*prefixes, parameters: nil)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 -
parameterskey = nil
Source
# File activemodel/lib/active_model/attribute_methods.rb, line 108
def attribute_method_prefix(*prefixes, parameters: nil)
prefixes.map! { |prefix| AttributeMethodPattern.new(prefix: prefix, parameters: parameters) }
self.attribute_method_patterns = (attribute_method_patterns + prefixes).freeze
undefine_attribute_methods
end
Defined in activemodel/lib/active_model/attribute_methods.rb line 108
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Defined in ActiveModel::AttributeMethods::ClassMethods