refatctoring of some code repetition in spawn_methods

activerecord/lib/active_record/relation/spawn_methods.rb

@@ -50,22 +50,24 @@ def merge!(other) # :nodoc:
     #   Post.order('id asc').except(:order)                  # discards the order condition
     #   Post.where('id > 10').order('id asc').except(:where) # discards the where condition but keeps the order
     def except(*skips)
-      result = Relation.new(klass, table, values.except(*skips))
-      result.default_scoped = default_scoped
-      result.extend(*extending_values) if extending_values.any?
-      result
+      relation_with values.except(*skips)
     end
 
     # Removes any condition from the query other than the one(s) specified in +onlies+.
     #
     #   Post.order('id asc').only(:where)         # discards the order condition
     #   Post.order('id asc').only(:where, :order) # uses the specified order
     def only(*onlies)
-      result = Relation.new(klass, table, values.slice(*onlies))
-      result.default_scoped = default_scoped
-      result.extend(*extending_values) if extending_values.any?
-      result
+      relation_with values.slice(*onlies)
     end
 
+    private
+
+      def relation_with(values) # :nodoc:
+        result = Relation.new(klass, table, values)
+        result.default_scoped = default_scoped
+        result.extend(*extending_values) if extending_values.any?
+        result
+      end
   end
 end