Refs #11557 -- Removed the field_name keyword argument to QuerySet.earliest() and latest().

Per deprecation timeline.

django/db/models/query.py

@@ -25,7 +25,6 @@ from django.db.models.query_utils import FilteredRelation, InvalidQuery, Q
 from django.db.models.sql.constants import CURSOR, GET_ITERATOR_CHUNK_SIZE
 from django.db.utils import NotSupportedError
 from django.utils import timezone
-from django.utils.deprecation import RemovedInDjango30Warning
 from django.utils.functional import cached_property, partition
 from django.utils.version import get_version
 
@@ -607,22 +606,12 @@ class QuerySet:
                 ))
         return params
 
-    def _earliest(self, *fields, field_name=None):
+    def _earliest(self, *fields):
         """
         Return the earliest object according to fields (if given) or by the
         model's Meta.get_latest_by.
         """
-        if fields and field_name is not None:
-            raise ValueError('Cannot use both positional arguments and the field_name keyword argument.')
-
-        if field_name is not None:
-            warnings.warn(
-                'The field_name keyword argument to earliest() and latest() '
-                'is deprecated in favor of passing positional arguments.',
-                RemovedInDjango30Warning,
-            )
-            order_by = (field_name,)
-        elif fields:
+        if fields:
             order_by = fields
         else:
             order_by = getattr(self.model._meta, 'get_latest_by')
@@ -642,11 +631,11 @@ class QuerySet:
         obj.query.add_ordering(*order_by)
         return obj.get()
 
-    def earliest(self, *fields, field_name=None):
-        return self._earliest(*fields, field_name=field_name)
+    def earliest(self, *fields):
+        return self._earliest(*fields)
 
-    def latest(self, *fields, field_name=None):
-        return self.reverse()._earliest(*fields, field_name=field_name)
+    def latest(self, *fields):
+        return self.reverse()._earliest(*fields)
 
     def first(self):
         """Return the first object of a query or None if no match is found."""

docs/releases/3.0.txt

@@ -247,6 +247,9 @@ to remove usage of these features.
 * Support for the ``context`` argument of ``Field.from_db_value()`` and
   ``Expression.convert_value()`` is removed.
 
+* The ``field_name`` keyword argument of ``QuerySet.earliest()` and
+  ``latest()`` is removed.
+
 See :ref:`deprecated-features-2.1` for details on these changes, including how
 to remove usage of these features.
 

tests/get_earliest_or_latest/tests.py

 from datetime import datetime
 
 from django.test import TestCase
-from django.utils.deprecation import RemovedInDjango30Warning
 
 from .models import Article, IndexErrorArticle, Person
 
@@ -82,11 +81,6 @@ class EarliestOrLatestTests(TestCase):
         Article.objects.model._meta.get_latest_by = ('pub_date', 'expire_date')
         self.assertEqual(Article.objects.filter(pub_date=datetime(2005, 7, 28)).earliest(), a4)
 
-    def test_earliest_fields_and_field_name(self):
-        msg = 'Cannot use both positional arguments and the field_name keyword argument.'
-        with self.assertRaisesMessage(ValueError, msg):
-            Article.objects.earliest('pub_date', field_name='expire_date')
-
     def test_latest(self):
         # Because no Articles exist yet, latest() raises ArticleDoesNotExist.
         with self.assertRaises(Article.DoesNotExist):
@@ -149,11 +143,6 @@ class EarliestOrLatestTests(TestCase):
         Article.objects.model._meta.get_latest_by = ('pub_date', 'expire_date')
         self.assertEqual(Article.objects.filter(pub_date=datetime(2005, 7, 27)).latest(), a3)
 
-    def test_latest_fields_and_field_name(self):
-        msg = 'Cannot use both positional arguments and the field_name keyword argument.'
-        with self.assertRaisesMessage(ValueError, msg):
-            Article.objects.latest('pub_date', field_name='expire_date')
-
     def test_latest_manual(self):
         # You can still use latest() with a model that doesn't have
         # "get_latest_by" set -- just pass in the field name manually.
@@ -167,15 +156,6 @@ class EarliestOrLatestTests(TestCase):
             Person.objects.latest()
         self.assertEqual(Person.objects.latest("birthday"), p2)
 
-    def test_field_name_kwarg_deprecation(self):
-        Person.objects.create(name='Deprecator', birthday=datetime(1950, 1, 1))
-        msg = (
-            'The field_name keyword argument to earliest() and latest() '
-            'is deprecated in favor of passing positional arguments.'
-        )
-        with self.assertWarnsMessage(RemovedInDjango30Warning, msg):
-            Person.objects.latest(field_name='birthday')
-
 
 class TestFirstLast(TestCase):