add changelog and tests

Author: bckohan

.gitignore

@@ -221,3 +221,4 @@ __marimo__/
 
 test1.db
 test2.db
+example/example.db

docs/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 v4.3.0 (202X-XX-XX)
 -------------------
 
+* Implemented `Include get_child_inlines() hook in stacked inline admin forms. <https://github.com/jazzband/django-polymorphic/pull/681>`_
 * Fixed `"multi-database support in inheritance accessors. <https://github.com/jazzband/django-polymorphic/pull/550>`_
 * Fixed `Caching in inheritance accessor functions <https://github.com/jazzband/django-polymorphic/pull/510>`_
 * Fixed `Foreign key resolves to parent class when using abstract models <https://github.com/jazzband/django-polymorphic/issues/437>`_

justfile

@@ -15,7 +15,7 @@ manage *COMMAND:
     import sys
     from django.core import management
     sys.path.append(os.getcwd())
-    os.environ["DJANGO_SETTINGS_MODULE"] = "polymorphic.tests.settings"
+    os.environ["DJANGO_SETTINGS_MODULE"] = "polymorphic.tests.debug"
     os.environ["SQLITE_DATABASES"] = "test1.db,test2.db"
     management.execute_from_command_line(sys.argv + "{{ COMMAND }}".split(" "))
 

src/polymorphic/admin/inlines.py

@@ -81,8 +81,9 @@ def get_child_inlines(self):
         """
         Return the derived inline classes which this admin should handle.
 
-        This should return a list of tuples, exactly like
-        :attr:`child_inlines` is.
+        This should return an iterable of
+        :class:`~polymorphic.admin.inlines.PolymorphicInlineModelAdmin.Child classes,
+        to override :attr:`child_inlines.
         """
         return self.child_inlines or []
 

src/polymorphic/tests/admin.py

@@ -57,3 +57,4 @@ class InlineModelBChild(StackedPolymorphicInline.Child):
 @register(InlineParent)
 class InlineParentAdmin(PolymorphicInlineSupportMixin, ModelAdmin):
     inlines = (Inline,)
+    extra = 1

src/polymorphic/tests/debug.py

@@ -0,0 +1,3 @@
+from .settings import *
+
+DEBUG = True

src/polymorphic/tests/settings.py

@@ -101,6 +101,7 @@
     "polymorphic",
     "polymorphic.tests",
 )
+
 MIDDLEWARE = (
     "django.middleware.common.CommonMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",

src/polymorphic/tests/test_admin.py

@@ -236,6 +236,15 @@ def tearDown(self):
         InlineParent.objects.all().delete()
         super().tearDown()
 
+    def test_get_child_inlines(self):
+        from .admin import Inline
+
+        inline = Inline(parent_model=InlineParent, admin_site=admin.site)
+        child_inlines = inline.get_child_inlines()
+        self.assertEqual(len(child_inlines), 2)
+        self.assertEqual(child_inlines[0], Inline.InlineModelAChild)
+        self.assertEqual(child_inlines[1], Inline.InlineModelBChild)
+
     def test_admin_inline_add_autocomplete(self):
         # https://github.com/jazzband/django-polymorphic/issues/546
         self.page.goto(self.add_url(InlineParent))