Fixed #27002 -- Prevented double query when rendering ModelChoiceField.

1 files changed, 14 insertions, 3 deletions

diff --git a/tests/model_forms/tests.py b/tests/model_forms/tests.py
index 8c706f1a56..085a95733e 100644
--- a/tests/model_forms/tests.py
+++ b/tests/model_forms/tests.py
@@ -1576,11 +1576,22 @@ class ModelChoiceFieldTests(TestCase):
         field = CustomModelChoiceField(Category.objects.all())
         self.assertIsInstance(field.choices, CustomModelChoiceIterator)
 
-    def test_radioselect_num_queries(self):
+    def test_modelchoicefield_num_queries(self):
+        """
+        Widgets that render multiple subwidgets shouldn't make more than one
+        database query.
+        """
+        categories = Category.objects.all()
+
         class CategoriesForm(forms.Form):
-            categories = forms.ModelChoiceField(Category.objects.all(), widget=forms.RadioSelect)
+            radio = forms.ModelChoiceField(queryset=categories, widget=forms.RadioSelect)
+            checkbox = forms.ModelMultipleChoiceField(queryset=categories, widget=forms.CheckboxSelectMultiple)
+
+        template = Template("""
+            {% for widget in form.checkbox %}{{ widget }}{% endfor %}
+            {% for widget in form.radio %}{{ widget }}{% endfor %}
+        """)
 
-        template = Template('{% for widget in form.categories %}{{ widget }}{% endfor %}')
         with self.assertNumQueries(2):
             template.render(Context({'form': CategoriesForm()}))