Class: Class

Inherits:
Object show all
Defined in:
lib/core_utilities/core_ext/class.rb

Instance Method Summary collapse

Instance Method Details

#class_attribute_with_default(*attrs) ⇒ Object

Purpose is to be able to define a default value for a class_attribute when one isn’t initially set.



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/core_utilities/core_ext/class.rb', line 6

def class_attribute_with_default(*attrs) # Actually, this IS being used currently by gems in lib/
  hash = attrs.last.is_a?(Hash) ? attrs.pop : {}
  my_default = hash.delete(:default)
  instance_writer = hash.blank? || hash[:instance_writer]

  attrs.each do |name| # By the way, FIXME: i think this should be broken because if i want to use a string as a default, that will not be reflected.
    class_eval "      def self.\#{name}() \#{my_default || 'nil'} end\n      def self.\#{name}?() !!\#{name} end\n\n      def self.\#{name}=(val)\n        singleton_class.class_eval do\n          remove_possible_method(:\#{name})\n          define_method(:\#{name}) { val }\n        end\n        val\n      end\n\n      def \#{name}\n        defined?(@\#{name}) ? @\#{name} : singleton_class.\#{name}\n      end\n\n      def \#{name}?\n        !!\#{name}\n      end\n    RUBY\n\n    attr_writer name if instance_writer\n  end\nend\n", __FILE__, __LINE__ + 1