Django 4.2 preparation

.github/workflows/test.yml

@@ -20,42 +20,40 @@ jobs:
 
       matrix:
         python-version:
-          - '3.7'
-          - '3.8'
-          - '3.9'
-          - '3.10'
-          - '3.11'
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
 
     steps:
-    - uses: actions/checkout@v2
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-
-    - name: Get pip cache dir
-      id: pip-cache
-      run: echo "::set-output name=dir::$(pip cache dir)"
-
-    - name: Cache
-      uses: actions/cache@v2
-      with:
-        path: ${{ steps.pip-cache.outputs.dir }}
-        key:
-          ${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}-${{ hashFiles('**/tox.ini') }}
-        restore-keys: |
-          ${{ matrix.python-version }}-v1-
-
-    - name: Install Python dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install --upgrade tox tox-gh-actions
-
-    - name: Tox tests
-      run: tox -v
-
-    - name: Upload coverage
-      uses: codecov/codecov-action@v1
-      with:
-        name: Python ${{ matrix.python-version }}
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Get pip cache dir
+        id: pip-cache
+        run: echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}-${{ hashFiles('**/tox.ini') }}
+          restore-keys: |
+            ${{ matrix.python-version }}-v1-
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade tox tox-gh-actions
+
+      - name: Tox tests
+        run: tox -v
+
+      - name: Upload coverage
+        uses: codecov/codecov-action@v1
+        with:
+          name: Python ${{ matrix.python-version }}

CHANGELOG.rst

@@ -3,6 +3,15 @@ Changelog
 
 (Unreleased)
 ~~~~~~~~~~~~
+* **Backwards icompatible:** Rename the (``content_type``, ``object_id``) index on ``TaggedItem``.
+  It is very unlikely for this to affect your code itself, and a migration will rename the index. This should not cause any downtime according to my research (Postgres does not lock the table for index renames, and Oracle holds a tiny lock to do it, and the change is only to the metadata, so is not dependent on table size).
+
+* **Backwards incompatible:** Remove the ``.indexed_together`` and ``.unique_together`` attributes on ``TaggedItem``
+
+  We are instead using ``constraints`` and ``indexes`` to set up these properties.
+* Remove support for Django 3.2.
+* Remove usage of deprecated APIs for Django 4.2
+* Remove support for Python 3.7 (no code changes involved)
 * Fix ``tag_kwargs`` and ``TAGGIT_CASE_INSENSITIVE=True`` discrepency.
 
 4.0.0 (2023-05-04)

setup.cfg

@@ -44,6 +44,7 @@ exclude = tests*
 [flake8]
 # E501: line too long
 ignore = E501
+exclude = .venv,.git,.tox
 
 [isort]
 profile = black

taggit/managers.py

@@ -84,8 +84,19 @@ def get_queryset(self, extra_filters=None):
             )
 
     def get_prefetch_queryset(self, instances, queryset=None):
-        if queryset is not None:
-            raise ValueError("Custom queryset can't be used for this lookup.")
+        if queryset is None:
+            return self.get_prefetch_querysets(instances)
+        else:
+            return self.get_prefetch_querysets(instances, [queryset])
+
+    def get_prefetch_querysets(self, instances, querysets=None):
+        if querysets is not None:
+            # this queryset is meant to be used for filtering down the prefetch
+            # this work has not been done yet.
+            #
+            # Some hint from Django: asserting that len(querysets) == 1 if it's not None
+            # and then using that to filter down the qs
+            raise ValueError("Custom querysets can't be used for this lookup.")
 
         instance = instances[0]
         db = self._db or router.db_for_read(type(instance), instance=instance)

taggit/migrations/0002_auto_20150616_2121.py

@@ -1,11 +1,23 @@
-from django.db import migrations
+from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
     dependencies = [("taggit", "0001_initial")]
 
     operations = [
-        migrations.AlterIndexTogether(
-            name="taggeditem", index_together={("content_type", "object_id")}
+        # this migration was modified from previously being
+        # a ModifyIndexTogether operation.
+        #
+        # If you are a long-enough user of this library, the name
+        # of the index does not match what is written here. Please
+        # query the DB itself to find out what the name originally was.
+        migrations.AddIndex(
+            "taggeditem",
+            models.Index(
+                fields=("content_type", "object_id"),
+                # this is not the name of the index in previous version,
+                # but this is necessary to deal with index_together issues.
+                name="taggit_tagg_content_8fc721_idx",
+            ),
         )
     ]

taggit/migrations/0003_taggeditem_add_unique_index.py

@@ -1,4 +1,4 @@
-from django.db import migrations
+from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
@@ -8,7 +8,13 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-        migrations.AlterUniqueTogether(
-            name="taggeditem", unique_together={("content_type", "object_id", "tag")}
-        )
+        # this migration was modified to declare a uniqueness constraint differently
+        # this change was written on 2023-09-20, if any issues occurred from this please report it upstream
+        migrations.AddConstraint(
+            model_name="taggeditem",
+            constraint=models.UniqueConstraint(
+                fields=("content_type", "object_id", "tag"),
+                name="taggit_taggeditem_content_type_id_object_id_tag_id_4bb97a8e_uniq",
+            ),
+        ),
     ]

taggit/migrations/0006_rename_taggeditem_content_type_object_id_taggit_tagg_content_8fc721_idx.py

@@ -0,0 +1,16 @@
+# Generated by Django 4.2.5 on 2023-09-19 23:16
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("taggit", "0005_auto_20220424_2025"),
+    ]
+
+    operations = [
+        migrations.RenameIndex(
+            model_name="taggeditem",
+            new_name="taggit_tagg_content_8fc721_idx",
+            old_fields=("content_type", "object_id"),
+        ),
+    ]

taggit/models.py

@@ -187,5 +187,15 @@ class Meta:
         verbose_name = _("tagged item")
         verbose_name_plural = _("tagged items")
         app_label = "taggit"
-        index_together = [["content_type", "object_id"]]
-        unique_together = [["content_type", "object_id", "tag"]]
+        indexes = [
+            models.Index(
+                fields=["content_type", "object_id"],
+            )
+        ]
+
+        constraints = [
+            models.UniqueConstraint(
+                fields=("content_type", "object_id", "tag"),
+                name="taggit_taggeditem_content_type_id_object_id_tag_id_4bb97a8e_uniq",
+            )
+        ]

tests/settings.py

@@ -43,3 +43,5 @@
 STATIC_URL = "/static/"
 
 DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
+
+USE_TZ = True

tests/tests.py

@@ -67,6 +67,9 @@
     UUIDTaggedItem,
 )
 
+if DJANGO_VERSION < (4, 2):
+    TestCase.assertQuerySetEqual = TestCase.assertQuerysetEqual
+
 
 class BaseTaggingTestCase(TestCase):
     def assert_tags_equal(self, qs, tags, sort=True, attr="name"):
@@ -591,7 +594,7 @@ def test_lookup_by_tag(self):
 
         pks = self.pet_model.objects.filter(tags__name__in=["fuzzy"])
         model_name = self.pet_model.__name__
-        self.assertQuerysetEqual(
+        self.assertQuerySetEqual(
             pks,
             [f"<{model_name}: kitty>", f"<{model_name}: cat>"],
             ordered=False,
@@ -609,7 +612,7 @@ def test_exclude(self):
 
         pks = self.food_model.objects.exclude(tags__name__in=["red"])
         model_name = self.food_model.__name__
-        self.assertQuerysetEqual(
+        self.assertQuerySetEqual(
             pks,
             [f"<{model_name}: pear>", f"<{model_name}: guava>"],
             ordered=False,
@@ -963,20 +966,23 @@ def _get_form_str(self, form_str):
             # https://github.com/django/django/commit/98756c685ee173bbd43f21ed0553f808be835ce5
             # https://github.com/django/django/commit/232b60a21b951bd16b8c95b34fcbcbf3ecd89fca
             form_str %= {
-                "help_start": '<div class="helptext">',
+                "help_start": '<div class="helptext" id="id_tags_helptext">',
                 "help_stop": "</div>",
                 "required": "required",
+                "aria": 'aria-describedby="id_tags_helptext"',
             }
         else:
             form_str %= {
                 "help_start": '<span class="helptext">',
                 "help_stop": "</span>",
                 "required": "required",
+                "aria": "",
             }
         return form_str
 
     def assertFormRenders(self, form, html):
-        self.assertHTMLEqual(str(form), self._get_form_str(html))
+        rendered_form = form.as_table() if DJANGO_VERSION < (5, 0) else form.as_div()
+        self.assertHTMLEqual(rendered_form, self._get_form_str(html))
 
     def test_form(self):
         self.assertEqual(list(self.form_class.base_fields), ["name", "tags"])
@@ -986,7 +992,7 @@ def test_form(self):
             self.assertFormRenders(
                 f,
                 """<div><label for="id_name">Name:</label><input id="id_name" type="text" name="name" value="apple" maxlength="50" %(required)s /></div>
-    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input type="text" name="tags" value="green, red, yummy" id="id_tags" %(required)s /></div>""",
+    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input %(aria)s type="text" name="tags" value="green, red, yummy" id="id_tags" %(required)s /></div>""",
             )
         else:
             self.assertFormRenders(
@@ -1014,7 +1020,7 @@ def test_form(self):
             self.assertFormRenders(
                 f,
                 """<div><label for="id_name">Name:</label><input id="id_name" type="text" name="name" value="apple" maxlength="50" %(required)s /></div>
-    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input type="text" name="tags" value="delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
+    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input %(aria)s type="text" name="tags" value="delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
             )
         else:
             self.assertFormRenders(
@@ -1029,7 +1035,7 @@ def test_form(self):
             self.assertFormRenders(
                 f,
                 """<div><label for="id_name">Name:</label><input id="id_name" type="text" name="name" value="apple" maxlength="50" %(required)s /></div>
-    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input type="text" name="tags" value="&quot;has,comma&quot;, delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
+    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input %(aria)s type="text" name="tags" value="&quot;has,comma&quot;, delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
             )
         else:
             self.assertFormRenders(
@@ -1044,7 +1050,7 @@ def test_form(self):
             self.assertFormRenders(
                 f,
                 """<div><label for="id_name">Name:</label><input id="id_name" type="text" name="name" value="apple" maxlength="50" %(required)s /></div>
-    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input type="text" name="tags" value="&quot;has space&quot;, &quot;has,comma&quot;, delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
+    <div><label for="id_tags">Tags:</label>%(help_start)sA comma-separated list of tags.%(help_stop)s<input %(aria)s type="text" name="tags" value="&quot;has space&quot;, &quot;has,comma&quot;, delicious, green, red, yummy" id="id_tags" %(required)s /></div>""",
             )
         else:
             self.assertFormRenders(

tox.ini

@@ -4,27 +4,26 @@ envlist =
     black
     flake8
     isort
-    py{37,38,39,310}-dj32
     py{38,39,310,311}-dj{41,42}
     py{310,311}-djmain
     docs
 
 [gh-actions]
 python =
-    3.7: py37
     3.8: py38, black, flake8, isort
     3.9: py39
     3.10: py310
     3.11: py311
 
 [testenv]
 deps =
-    dj32: Django>=3.2,<3.3
     dj41: Django>=4.1,<4.2
     dj42: Django>=4.2,<5.0
     djmain: https://github.com/django/django/archive/main.tar.gz
     coverage
     djangorestframework
+setenv =
+    PYTHONWARNINGS=all
 commands =
     coverage run -m django test --settings=tests.settings {posargs}
     coverage report
@@ -38,7 +37,7 @@ ignore_errors =
 basepython = python3
 skip_install = true
 deps = black
-commands = black --target-version=py37 --check --diff .
+commands = black --target-version=py38 --check --diff .
 
 [testenv:flake8]
 basepython = python3