[Junie]: Junie: BaseInlineFormSet does not support "auto_id"

django/forms/models.py

@@ -1112,6 +1112,7 @@
         save_as_new=False,
         prefix=None,
         queryset=None,
+        auto_id="id_%s",
         **kwargs,
     ):
         if instance is None:
@@ -1126,7 +1127,7 @@
         else:
             qs = queryset.none()
         self.unique_fields = {self.fk.name}
-        super().__init__(data, files, prefix=prefix, queryset=qs, **kwargs)
+        super().__init__(data, files, auto_id=auto_id, prefix=prefix, queryset=qs, **kwargs)
 
         # Add the generated field to form._meta.fields if it's defined to make
         # sure validation isn't skipped on that field.

tests/model_formsets/test_auto_id.py

@@ -0,0 +1,25 @@
+from django.test import TestCase
+from django.forms.models import inlineformset_factory
+from .models import Author, Book
+
+class InlineFormsetAutoIdTest(TestCase):
+    def test_inline_formset_auto_id(self):
+        """Test that BaseInlineFormSet accepts the auto_id parameter."""
+        # Create an inline formset with a custom auto_id
+        AuthorBooksFormSet = inlineformset_factory(
+            Author, Book, can_delete=False, extra=1, fields="__all__"
+        )
+        author = Author.objects.create(name="Test Author")
+
+        # Test with default auto_id
+        formset = AuthorBooksFormSet(instance=author)
+        self.assertEqual(formset.auto_id, "id_%s")
+
+        # Test with custom auto_id
+        custom_auto_id = "custom_%s"
+        formset = AuthorBooksFormSet(instance=author, auto_id=custom_auto_id)
+        self.assertEqual(formset.auto_id, custom_auto_id)
+
+        # Verify that the auto_id is used in the rendered form
+        form_html = formset.forms[0].as_p()
+        self.assertIn(f'id="custom_book_set-0-title"', form_html)