Fixed #8898 -- Obsoleted SplitDateTimeWidget usage with DateTimeField

Thanks Tim Graham for the review.

django/forms/fields.py

@@ -486,6 +486,10 @@ class DateTimeField(BaseTemporalField):
         if isinstance(value, list):
             # Input comes from a SplitDateTimeWidget, for example. So, it's two
             # components: date and time.
+            warnings.warn(
+                'Using SplitDateTimeWidget with DateTimeField is deprecated. '
+                'Use SplitDateTimeField instead.',
+                PendingDeprecationWarning, stacklevel=2)
             if len(value) != 2:
                 raise ValidationError(self.error_messages['invalid'], code='invalid')
             if value[0] in self.empty_values and value[1] in self.empty_values:

docs/internals/deprecation.txt

@@ -215,6 +215,9 @@ these changes.
 
 * ``django.forms.get_declared_fields`` will be removed.
 
+* The ability to use a ``SplitDateTimeWidget`` with ``DateTimeField`` will be
+  removed.
+
 * The ``WSGIRequest.REQUEST`` property will be removed.
 
 * The class ``django.utils.datastructures.MergeDict`` will be removed.

docs/ref/forms/fields.txt

@@ -458,6 +458,12 @@ For each field, we describe the default widget used if you don't specify
 
     See also :ref:`format localization <format-localization>`.
 
+    .. deprecated:: 1.7
+
+        The ability to use :class:`SplitDateTimeWidget` with ``DateTimeField``
+        has been deprecated and will be removed in Django 1.9. Use
+        :class:`SplitDateTimeField` instead.
+
 ``DecimalField``
 ~~~~~~~~~~~~~~~~
 

docs/releases/1.7.txt

@@ -1063,3 +1063,10 @@ the arguments may have been evaluated at query time.
 
 The ``ADMIN_FOR`` feature, part of the admindocs, has been removed. You can
 remove the setting from your configuration at your convenience.
+
+``SplitDateTimeWidget`` with ``DateTimeField``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``SplitDateTimeWidget`` support in :class:`~django.forms.DateTimeField` is
+deprecated, use ``SplitDateTimeWidget`` with
+:class:`~django.forms.SplitDateTimeField` instead.

tests/forms_tests/tests/test_widgets.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 
 import copy
 import datetime
+import warnings
 
 from django.contrib.admin.tests import AdminSeleniumWebDriverTestCase
 from django.core.files.uploadedfile import SimpleUploadedFile
@@ -1092,18 +1093,22 @@ class WidgetTests(TestCase):
         class SplitDateForm(Form):
             field = DateTimeField(widget=SplitDateTimeWidget, required=False)
 
-        form = SplitDateForm({'field': ''})
-        self.assertTrue(form.is_valid())
-        form = SplitDateForm({'field': ['', '']})
-        self.assertTrue(form.is_valid())
+        with warnings.catch_warnings():
+            warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
+            form = SplitDateForm({'field': ''})
+            self.assertTrue(form.is_valid())
+            form = SplitDateForm({'field': ['', '']})
+            self.assertTrue(form.is_valid())
 
         class SplitDateRequiredForm(Form):
             field = DateTimeField(widget=SplitDateTimeWidget, required=True)
 
-        form = SplitDateRequiredForm({'field': ''})
-        self.assertFalse(form.is_valid())
-        form = SplitDateRequiredForm({'field': ['', '']})
-        self.assertFalse(form.is_valid())
+        with warnings.catch_warnings():
+            warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
+            form = SplitDateRequiredForm({'field': ''})
+            self.assertFalse(form.is_valid())
+            form = SplitDateRequiredForm({'field': ['', '']})
+            self.assertFalse(form.is_valid())
 
 
 class LiveWidgetTests(AdminSeleniumWebDriverTestCase):