lib/pg_search/features/dmetaphone.rb in pg_search-0.6.0 vs lib/pg_search/features/dmetaphone.rb in pg_search-0.6.1

@@ -24,11 +24,17 @@
         def initialize(normalizer_to_wrap)
           @normalizer_to_wrap = normalizer_to_wrap
         end
 
         def add_normalization(original_sql)
-          otherwise_normalized_sql = normalizer_to_wrap.add_normalization(original_sql)
-          "pg_search_dmetaphone(#{otherwise_normalized_sql})"
+          otherwise_normalized_sql = Arel.sql(
+            normalizer_to_wrap.add_normalization(original_sql)
+          )
+
+          Arel::Nodes::NamedFunction.new(
+            "pg_search_dmetaphone",
+            [otherwise_normalized_sql]
+          ).to_sql
         end
 
         private
 
         attr_reader :normalizer_to_wrap