Module: Stipulate::ClassMethods

Defined in:
lib/stipulate.rb

Instance Method Summary collapse

Instance Method Details

#stipulate(opts = {}) ⇒ Object 



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
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/stipulate.rb', line 9

def stipulate(opts={})
	method = opts[:that].to_s
	enumeration = method.pluralize

	singleton_class.class_eval <<-"END"
		cattr_accessor :#{enumeration}
	END
	
	# If the method is customized, we want to retain changes through a wrapper
	if instance_methods.include? method.to_sym
		class_eval <<-"END"
			# Ensure fields are converted to string
			def #{method}_with_stipulation
				v = #{method}_without_stipulation
				v.nil? ? nil : v.to_s
			end
		END
	
		alias_method_chain method.to_sym, :stipulation
	else
		class_eval <<-"END"
			# Ensure fields are converted to string
			def #{method}
				v = attributes["#{method}"]
				v.nil? ? nil : v.to_s
			end
		END
	end
	
	singleton_class.send :"#{enumeration}=", opts[:can_be]
	
	for enum in opts[:can_be] do
		class_eval <<-"END"
		  def #{enum}?
				#{method}.to_s.to_sym == :#{enum}
		  end
		END
	end
end