1 files changed, 5 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/type/hash_lookup_type_map.rb b/activerecord/lib/active_record/type/hash_lookup_type_map.rb
index bf92680268..82d9327fc0 100644
--- a/activerecord/lib/active_record/type/hash_lookup_type_map.rb
+++ b/activerecord/lib/active_record/type/hash_lookup_type_map.rb
@@ -3,16 +3,14 @@ module ActiveRecord
     class HashLookupTypeMap < TypeMap # :nodoc:
       delegate :key?, to: :@mapping
 
-      def lookup(type, *args)
-        @mapping.fetch(type, proc { default_value }).call(type, *args)
+      def alias_type(type, alias_type)
+        register_type(type) { |_, *args| lookup(alias_type, *args) }
       end
 
-      def fetch(type, *args, &block)
-        @mapping.fetch(type, block).call(type, *args)
-      end
+      private
 
-      def alias_type(type, alias_type)
-        register_type(type) { |_, *args| lookup(alias_type, *args) }
+      def perform_fetch(type, *args, &block)
+        @mapping.fetch(type, block).call(type, *args)
       end
     end
   end