Fixed #23891 -- Moved deprecation of IPAddressField to system check framework.

Thanks Markus Holtermann for review.

django/contrib/auth/tests/test_management.py

@@ -334,6 +334,7 @@ class CreatesuperuserManagementCommandTestCase(TestCase):
         command.execute(
             stdin=sentinel,
             stdout=six.StringIO(),
+            stderr=six.StringIO(),
             interactive=False,
             verbosity=0,
             username='janet',
@@ -344,6 +345,7 @@ class CreatesuperuserManagementCommandTestCase(TestCase):
         command = createsuperuser.Command()
         command.execute(
             stdout=six.StringIO(),
+            stderr=six.StringIO(),
             interactive=False,
             verbosity=0,
             username='joe',

django/db/models/fields/__init__.py

@@ -20,7 +20,6 @@ from django import forms
 from django.core import exceptions, validators, checks
 from django.utils.datastructures import DictWrapper
 from django.utils.dateparse import parse_date, parse_datetime, parse_time, parse_duration
-from django.utils.deprecation import RemovedInDjango19Warning
 from django.utils.duration import duration_string
 from django.utils.functional import cached_property, curry, total_ordering, Promise
 from django.utils.text import capfirst
@@ -1836,8 +1835,6 @@ class IPAddressField(Field):
     description = _("IPv4 address")
 
     def __init__(self, *args, **kwargs):
-        warnings.warn("IPAddressField has been deprecated. Use GenericIPAddressField instead.",
-                      RemovedInDjango19Warning)
         kwargs['max_length'] = 15
         super(IPAddressField, self).__init__(*args, **kwargs)
 
@@ -1860,6 +1857,19 @@ class IPAddressField(Field):
         defaults.update(kwargs)
         return super(IPAddressField, self).formfield(**defaults)
 
+    def check(self, **kwargs):
+        errors = super(IPAddressField, self).check(**kwargs)
+        errors.append(
+            checks.Warning(
+                'IPAddressField has been deprecated. Support for it '
+                '(except in historical migrations) will be removed in Django 1.9.',
+                hint='Use GenericIPAddressField instead.',
+                obj=self,
+                id='fields.W900',
+            )
+        )
+        return errors
+
 
 class GenericIPAddressField(Field):
     empty_strings_allowed = True

docs/internals/deprecation.txt

@@ -159,7 +159,8 @@ details on these changes.
   is loaded. In particular, it won't be possible to import models inside
   the root package of their application.
 
-* The model and form ``IPAddressField`` will be removed.
+* The model and form ``IPAddressField`` will be removed. A stub field will
+  remain for compatibility with historical migrations.
 
 * ``AppCommand.handle_app()`` will no longer be supported.
 

docs/ref/checks.txt

@@ -95,6 +95,8 @@ Fields
 * **fields.E160**: The options ``auto_now``, ``auto_now_add``, and ``default``
   are mutually exclusive. Only one of these options may be present.
 * **fields.W161**: Fixed default value provided.
+* **fields.W900**: ``IPAddressField`` has been deprecated. Support for it
+  (except in historical migrations) will be removed in Django 1.9.
 
 File Fields
 ~~~~~~~~~~~

docs/releases/1.7.2.txt

@@ -192,3 +192,8 @@ Bugfixes
 
 * Prevented a crash on apps without migrations when running ``migrate --list``
   (:ticket:`23366`).
+
+* The deprecation of ``IPAddressField`` is now handled through the system
+  check framework (with error code ``fields.W900``) so that deprecation
+  warnings aren't displayed if the field only appears in historical migrations
+  (:ticket:`23891`).

tests/forms_tests/tests/test_error_messages.py

@@ -9,7 +9,8 @@ from django.forms import (
     ModelMultipleChoiceField, MultipleChoiceField, RegexField,
     SplitDateTimeField, TimeField, URLField, utils, ValidationError,
 )
-from django.test import TestCase
+from django.test import ignore_warnings, TestCase
+from django.utils.deprecation import RemovedInDjango19Warning
 from django.utils.safestring import mark_safe
 from django.utils.encoding import python_2_unicode_compatible
 
@@ -196,6 +197,7 @@ class FormsErrorMessagesTestCase(TestCase, AssertFormErrorsMixin):
         self.assertFormErrors(['REQUIRED'], f.clean, '')
         self.assertFormErrors(['INVALID DATE', 'INVALID TIME'], f.clean, ['a', 'b'])
 
+    @ignore_warnings(category=RemovedInDjango19Warning)
     def test_ipaddressfield(self):
         e = {
             'required': 'REQUIRED',

tests/forms_tests/tests/test_extra.py

@@ -11,10 +11,11 @@ from django.forms import (
 )
 from django.forms.extras import SelectDateWidget
 from django.forms.utils import ErrorList
-from django.test import TestCase, override_settings
+from django.test import TestCase, ignore_warnings, override_settings
 from django.utils import six
 from django.utils import translation
 from django.utils.dates import MONTHS_AP
+from django.utils.deprecation import RemovedInDjango19Warning
 from django.utils.encoding import force_text, smart_text, python_2_unicode_compatible
 
 from .test_error_messages import AssertFormErrorsMixin
@@ -482,6 +483,7 @@ class FormsExtraTestCase(TestCase, AssertFormErrorsMixin):
 
         self.assertEqual(f.cleaned_data['field1'], 'some text,JP,2007-04-25 06:24:00')
 
+    @ignore_warnings(category=RemovedInDjango19Warning)
     def test_ipaddress(self):
         f = IPAddressField()
         self.assertFormErrors(['This field is required.'], f.clean, '')

tests/inspectdb/models.py

@@ -1,10 +1,7 @@
 # -*- encoding: utf-8 -*-
 from __future__ import unicode_literals
 
-import warnings
-
 from django.db import models
-from django.utils.deprecation import RemovedInDjango19Warning
 
 
 class People(models.Model):
@@ -62,9 +59,7 @@ class ColumnTypes(models.Model):
     file_path_field = models.FilePathField()
     float_field = models.FloatField()
     int_field = models.IntegerField()
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore", category=RemovedInDjango19Warning)
-        ip_address_field = models.IPAddressField()
+    ip_address_field = models.IPAddressField()
     gen_ip_adress_field = models.GenericIPAddressField(protocol="ipv4")
     pos_int_field = models.PositiveIntegerField()
     pos_small_int_field = models.PositiveSmallIntegerField()

tests/model_fields/tests.py

@@ -20,7 +20,6 @@ from django.db.models.fields import (
 from django.db.models.fields.files import FileField, ImageField
 from django.utils import six
 from django.utils.functional import lazy
-from django.test.utils import override_settings
 
 from .models import (
     Foo, Bar, Whiz, BigD, BigS, BigIntegerModel, Post, NullBooleanModel,
@@ -182,11 +181,11 @@ class ForeignKeyTests(test.TestCase):
         fk_model_empty = FkToChar.objects.select_related('out').get(id=fk_model_empty.pk)
         self.assertEqual(fk_model_empty.out, char_model_empty)
 
-    @override_settings(INSTALLED_APPS=['django.contrib.auth', 'django.contrib.contenttypes', 'model_fields'])
     def test_warning_when_unique_true_on_fk(self):
         class FKUniqueTrue(models.Model):
             fk_field = models.ForeignKey(Foo, unique=True)
 
+        model = FKUniqueTrue()
         expected_warnings = [
             checks.Warning(
                 'Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.',
@@ -195,7 +194,7 @@ class ForeignKeyTests(test.TestCase):
                 id='fields.W342',
             )
         ]
-        warnings = checks.run_checks()
+        warnings = model.check()
         self.assertEqual(warnings, expected_warnings)
 
     def test_related_name_converted_to_text(self):
@@ -799,7 +798,6 @@ class PromiseTest(test.TestCase):
             int)
 
     def test_IPAddressField(self):
-        # Deprecation silenced in runtests.py
         lazy_func = lazy(lambda: '127.0.0.1', six.text_type)
         self.assertIsInstance(
             IPAddressField().get_prep_value(lazy_func()),
@@ -809,6 +807,22 @@ class PromiseTest(test.TestCase):
             IPAddressField().get_prep_value(lazy_func()),
             six.text_type)
 
+    def test_IPAddressField_deprecated(self):
+        class IPAddressModel(models.Model):
+            ip = IPAddressField()
+
+        model = IPAddressModel()
+        self.assertEqual(
+            model.check(),
+            [checks.Warning(
+                'IPAddressField has been deprecated. Support for it '
+                '(except in historical migrations) will be removed in Django 1.9.',
+                hint='Use GenericIPAddressField instead.',
+                obj=IPAddressModel._meta.get_field('ip'),
+                id='fields.W900',
+            )],
+        )
+
     def test_GenericIPAddressField(self):
         lazy_func = lazy(lambda: '127.0.0.1', six.text_type)
         self.assertIsInstance(

tests/runtests.py

@@ -246,11 +246,6 @@ def django_tests(verbosity, interactive, failfast, keepdb, reverse, test_labels)
             'initial_data fixtures are deprecated. Use data migrations instead.',
             RemovedInDjango19Warning
         )
-        warnings.filterwarnings(
-            'ignore',
-            'IPAddressField has been deprecated. Use GenericIPAddressField instead.',
-            RemovedInDjango19Warning
-        )
         failures = test_runner.run_tests(
             test_labels or get_installed(), extra_tests=extra_tests)
 

tests/serializers_regress/models.py

@@ -4,14 +4,11 @@ A test spanning all the capabilities of all the serializers.
 This class sets up a model for each model field type
 (except for image types, because of the Pillow dependency).
 """
-import warnings
-
 from django.db import models
 from django.contrib.contenttypes.fields import (
     GenericForeignKey, GenericRelation
 )
 from django.contrib.contenttypes.models import ContentType
-from django.utils.deprecation import RemovedInDjango19Warning
 
 # The following classes are for testing basic data
 # marshalling, including NULL values, where allowed.
@@ -69,9 +66,7 @@ class BigIntegerData(models.Model):
 
 
 class IPAddressData(models.Model):
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore", category=RemovedInDjango19Warning)
-        data = models.IPAddressField(null=True)
+    data = models.IPAddressField(null=True)
 
 
 class GenericIPAddressData(models.Model):
@@ -251,9 +246,7 @@ class IntegerPKData(models.Model):
 
 
 class IPAddressPKData(models.Model):
-    with warnings.catch_warnings(record=True) as w:
-        warnings.simplefilter("always")
-        data = models.IPAddressField(primary_key=True)
+    data = models.IPAddressField(primary_key=True)
 
 
 class GenericIPAddressPKData(models.Model):