Use module.prepend instead of alias_method_chain

lib/paranoia.rb

@@ -261,14 +261,16 @@ require 'paranoia/rspec' if defined? RSpec
 
 module ActiveRecord
   module Validations
-    class UniquenessValidator < ActiveModel::EachValidator
-      protected
-      def build_relation_with_paranoia(klass, table, attribute, value)
-        relation = build_relation_without_paranoia(klass, table, attribute, value)
+    module UniquenessParanoiaValidator
+      def build_relation(klass, table, attribute, value)
+        relation = super(klass, table, attribute, value)
         return relation unless klass.respond_to?(:paranoia_column)
         relation.and(klass.arel_table[klass.paranoia_column].eq(klass.paranoia_sentinel_value))
       end
-      alias_method_chain :build_relation, :paranoia
+    end
+
+    class UniquenessValidator < ActiveModel::EachValidator
+      prepend UniquenessParanoiaValidator
     end
   end
 end