activerecord/lib/active_record/type.rb
Required Files
active_model/type active_record/type/ internal/ timezone active_record/type/ date active_record/type/ date_time active_record/type/ decimal_without_scale active_record/type/ json active_record/type/ time active_record/type/ text active_record/type/ unsigned_integer active_record/type/ serialized active_record/type/ adapter_specific_registry active_record/type/ type_map active_record/type/ hash_lookup_type_map