key.rb in ripple-1.0.0.beta

- old
+ new

@@ -1,19 +1,5 @@
-# Copyright 2010 Sean Cribbs, Sonian Inc., and Basho Technologies, Inc.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License");
-#    you may not use this file except in compliance with the License.
-#    You may obtain a copy of the License at
-#
-#        http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS,
-#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#    See the License for the specific language governing permissions and
-#    limitations under the License.
-
 require 'active_support/concern'
 
 module Ripple
   module Document
     module Key
@@ -21,37 +7,31 @@
 
       module ClassMethods
         # Defines the key to be derived from a property.
         # @param [String,Symbol] prop the property to derive the key from
         def key_on(prop)
-          class_eval <<-CODE
-          def key
-            #{prop}.to_s
-          end
-          def key=(value)
-            self.#{prop} = value
-          end
-          def key_attr
-            :#{prop}
-          end          
-          CODE
+          prop = prop.to_sym
+
+          define_method(:key) { send(prop).to_s }
+          define_method(:key=) { |v| send(:"#{prop}=", v) }
+          define_method(:key_attr) { prop }
         end
       end
-      
+
       module InstanceMethods
         # Reads the key for this Document.
         def key
           @key
         end
-        
+
         # Sets the key for this Document.
         def key=(value)
           @key = value.to_s
         end
 
         def key_attr
           :key
-        end        
+        end
       end
     end
   end
 end