1 files changed, 18 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/type/helpers/time_value.rb b/activerecord/lib/active_record/type/helpers/time_value.rb
index 6e14c3a9b5..7eb41557cb 100644
--- a/activerecord/lib/active_record/type/helpers/time_value.rb
+++ b/activerecord/lib/active_record/type/helpers/time_value.rb
@@ -2,6 +2,24 @@ module ActiveRecord
   module Type
     module Helpers
       module TimeValue # :nodoc:
+        def serialize(value)
+          if precision && value.respond_to?(:usec)
+            number_of_insignificant_digits = 6 - precision
+            round_power = 10 ** number_of_insignificant_digits
+            value = value.change(usec: value.usec / round_power * round_power)
+          end
+
+          if value.acts_like?(:time)
+            zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal
+
+            if value.respond_to?(zone_conversion_method)
+              value = value.send(zone_conversion_method)
+            end
+          end
+
+          value
+        end
+
         def type_cast_for_schema(value)
           "'#{value.to_s(:db)}'"
         end