Class: Module

Inherits:
Object
  • Object
show all
Defined in:
lib/extensions/mattr_accessor.rb

Overview

Extends the module object with module and instance accessors for class attributes, just like the native attr* accessors for instance attributes.

module AppConfiguration
  mattr_accessor :google_api_key
  self.google_api_key = "123456789"

  mattr_accessor :paypal_url
  self.paypal_url = "www.sandbox.paypal.com"
end

AppConfiguration.google_api_key = "overriding the api key!"

Instance Method Summary collapse

Instance Method Details

#mattr_accessor(*syms) ⇒ Object 



51
52
53
54
 
# File 'lib/extensions/mattr_accessor.rb', line 51

def mattr_accessor(*syms)
  mattr_reader(*syms)
  mattr_writer(*syms)
end

#mattr_reader(*syms) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/extensions/mattr_accessor.rb', line 14

def mattr_reader(*syms)
  syms.each do |sym|
    next if sym.is_a?(Hash)
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}  # unless defined? @@pagination_options
        @@#{sym} = nil          #   @@pagination_options = nil
      end                       # end
                                #
      def self.#{sym}           # def self.pagination_options
        @@#{sym}                #   @@pagination_options
      end                       # end
                                #
      def #{sym}                # def pagination_options
        @@#{sym}                #   @@pagination_options
      end                       # end
    EOS
  end
end

#mattr_writer(*syms) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/extensions/mattr_accessor.rb', line 33

def mattr_writer(*syms)
  syms.each do |sym|
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}                       # unless defined? @@pagination_options
        @@#{sym} = nil                               #   @@pagination_options = nil
      end                                            # end
                                                     #
      def self.#{sym}=(obj)                          # def self.pagination_options=(obj)
        @@#{sym} = obj                               #   @@pagination_options = obj
      end                                            # end
                                                     #
      def #{sym}=(obj)                               # def pagination_options=(obj)
        @@#{sym} = obj                               #   @@pagination_options = obj
      end                                            # end
    EOS
  end
end