lib/rcoli/extensions.rb in rcoli-0.5.3 vs lib/rcoli/extensions.rb in rcoli-0.5.4

@@ -4,9 +4,13 @@
     instance_variable_set(ivar, value)
   end
   
   define_method("value_of_#{name}") do
     ivar = "@#{name}"
-    instance_variable_get(ivar).to_s
+    if (instance_variable_get(ivar))
+      instance_variable_get(ivar).to_s
+    else
+      nil
+    end
   end
   
 end