Fixed #28727 -- Fixed Cast crash on SQLite when casting a Python date/datetime to Date/DateTimeField.

django/db/backends/sqlite3/operations.py

@@ -14,6 +14,10 @@ from django.utils.duration import duration_string
 
 class DatabaseOperations(BaseDatabaseOperations):
     cast_char_field_without_max_length = 'text'
+    cast_data_types = {
+        'DateField': 'TEXT',
+        'DateTimeField': 'TEXT',
+    }
 
     def bulk_batch_size(self, fields, objs):
         """

tests/db_functions/test_cast.py

@@ -1,4 +1,6 @@
-from django.db import models
+import datetime
+
+from django.db import connection, models
 from django.db.models.expressions import Value
 from django.db.models.functions import Cast
 from django.test import TestCase, ignore_warnings, skipUnlessDBFeature
@@ -42,6 +44,19 @@ class CastTests(TestCase):
                 numbers = Author.objects.annotate(cast_int=Cast('alias', field_class()))
                 self.assertEqual(numbers.get().cast_int, 1)
 
+    def test_cast_from_python_to_date(self):
+        today = datetime.date.today()
+        dates = Author.objects.annotate(cast_date=Cast(today, models.DateField()))
+        self.assertEqual(dates.get().cast_date, today)
+
+    def test_cast_from_python_to_datetime(self):
+        now = datetime.datetime.now()
+        if connection.vendor == 'oracle':
+            # Workaround until #28934 is fixed.
+            now = now.replace(microsecond=0)
+        dates = Author.objects.annotate(cast_datetime=Cast(now, models.DateTimeField()))
+        self.assertEqual(dates.get().cast_datetime, now)
+
     def test_cast_from_python(self):
         numbers = Author.objects.annotate(cast_float=Cast(0, models.FloatField()))
         self.assertEqual(numbers.get().cast_float, 0.0)