1 files changed, 40 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
new file mode 100644
index 0000000000..6e14c3a9b5
--- /dev/null
+++ b/activerecord/lib/active_record/type/helpers/time_value.rb
@@ -0,0 +1,40 @@
+module ActiveRecord
+  module Type
+    module Helpers
+      module TimeValue # :nodoc:
+        def type_cast_for_schema(value)
+          "'#{value.to_s(:db)}'"
+        end
+
+        def user_input_in_time_zone(value)
+          value.in_time_zone
+        end
+
+        private
+
+        def new_time(year, mon, mday, hour, min, sec, microsec, offset = nil)
+          # Treat 0000-00-00 00:00:00 as nil.
+          return if year.nil? || (year == 0 && mon == 0 && mday == 0)
+
+          if offset
+            time = ::Time.utc(year, mon, mday, hour, min, sec, microsec) rescue nil
+            return unless time
+
+            time -= offset
+            Base.default_timezone == :utc ? time : time.getlocal
+          else
+            ::Time.public_send(Base.default_timezone, year, mon, mday, hour, min, sec, microsec) rescue nil
+          end
+        end
+
+        # Doesn't handle time zones.
+        def fast_string_to_time(string)
+          if string =~ ConnectionAdapters::Column::Format::ISO_DATETIME
+            microsec = ($7.to_r * 1_000_000).to_i
+            new_time $1.to_i, $2.to_i, $3.to_i, $4.to_i, $5.to_i, $6.to_i, microsec
+          end
+        end
+      end
+    end
+  end
+end