[1.7.x] Fixed #23316 -- Added datetime.time serialization in migrations.

Backport of 11d9cbe2f4 from master

AUTHORS

@@ -550,6 +550,7 @@ answer newbie questions, and generally made Django that much better:
     Bartolome Sanchez Salado <i42sasab@uco.es>
     Nick Sandford <nick.sandford@gmail.com>
     Mark Sandstrom <mark@deliciouslynerdy.com>
+    Lee Sanghyuck <shlee322@elab.kr>
     Kadesarin Sanjek
     Tim Saylor <tim.saylor@gmail.com>
     Massimo Scamarcia <massimo.scamarcia@gmail.com>

django/db/migrations/writer.py

@@ -279,6 +279,10 @@ class MigrationWriter(object):
             if isinstance(value, datetime_safe.date):
                 value_repr = "datetime.%s" % value_repr
             return value_repr, set(["import datetime"])
+        # Times
+        elif isinstance(value, datetime.time):
+            value_repr = repr(value)
+            return value_repr, set(["import datetime"])
         # Settings references
         elif isinstance(value, SettingsReference):
             return "settings.%s" % value.setting_name, set(["from django.conf import settings"])

docs/topics/migrations.txt

@@ -524,7 +524,7 @@ Django can serialize the following:
 
 - ``int``, ``long``, ``float``, ``bool``, ``str``, ``unicode``, ``bytes``, ``None``
 - ``list``, ``set``, ``tuple``, ``dict``
-- ``datetime.date`` and ``datetime.datetime`` instances
+- ``datetime.date``, ``datetime.time``, and ``datetime.datetime`` instances
 - ``decimal.Decimal`` instances
 - Any Django field
 - Any function or method reference (e.g. ``datetime.datetime.today``)

tests/migrations/test_writer.py

@@ -95,6 +95,7 @@ class WriterTests(TestCase):
         self.assertSerializedEqual(datetime.datetime.today)
         self.assertSerializedEqual(datetime.date.today())
         self.assertSerializedEqual(datetime.date.today)
+        self.assertSerializedEqual(datetime.datetime.now().time())
         with self.assertRaises(ValueError):
             self.assertSerializedEqual(datetime.datetime(2012, 1, 1, 1, 1, tzinfo=get_default_timezone()))
         safe_date = datetime_safe.date(2014, 3, 31)