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Code Issues 32 Releases Wiki Activity

Refs #28586 -- Copied fetch modes to related objects.

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This change ensures that behavior and performance remain consistent when
traversing relationships.
This commit is contained in:
Adam Johnson
2025-04-14 15:12:28 +01:00
committed by Jacob Walls
parent 821619aa87
commit 6dc9b04018
12 changed files with 310 additions and 14 deletions
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17
tests/model_inheritance_regress/tests.py
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@@ -7,6 +7,7 @@ from operator import attrgetter
from unittest import expectedFailure
from django import forms
from django.db.models import FETCH_PEERS
from django.test import TestCase
from .models import (
@@ -600,6 +601,22 @@ class ModelInheritanceTest(TestCase):
self.assertEqual(restaurant.place_ptr.restaurant, restaurant)
self.assertEqual(restaurant.italianrestaurant, italian_restaurant)
def test_parent_access_copies_fetch_mode(self):
italian_restaurant = ItalianRestaurant.objects.create(
name="Mom's Spaghetti",
address="2131 Woodward Ave",
serves_hot_dogs=False,
serves_pizza=False,
serves_gnocchi=True,
)
# No queries are made when accessing the parent objects.
italian_restaurant = ItalianRestaurant.objects.fetch_mode(FETCH_PEERS).get(
pk=italian_restaurant.pk
)
restaurant = italian_restaurant.restaurant_ptr
self.assertEqual(restaurant._state.fetch_mode, FETCH_PEERS)
def test_id_field_update_on_ancestor_change(self):
place1 = Place.objects.create(name="House of Pasta", address="944 Fullerton")
place2 = Place.objects.create(name="House of Pizza", address="954 Fullerton")