From 57c2e5da710b583110d8c7c20e91774a61d7472f Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Wed, 2 Nov 2022 12:30:16 +0100
Subject: [PATCH] Refs #33984 -- Added test for creating copies of model
instances with inherited m2m fields.
---
tests/model_inheritance/models.py | 4 ++++
tests/model_inheritance/tests.py | 17 +++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/tests/model_inheritance/models.py b/tests/model_inheritance/models.py
index a479faeda5..dc0e238f7e 100644
--- a/tests/model_inheritance/models.py
+++ b/tests/model_inheritance/models.py
@@ -110,6 +110,10 @@ class Supplier(Place):
customers = models.ManyToManyField(Restaurant, related_name="provider")
+class CustomSupplier(Supplier):
+ pass
+
+
class ParkingLot(Place):
# An explicit link to the parent (we can control the attribute name).
parent = models.OneToOneField(
diff --git a/tests/model_inheritance/tests.py b/tests/model_inheritance/tests.py
index d53a4f3257..4542e6c3cc 100644
--- a/tests/model_inheritance/tests.py
+++ b/tests/model_inheritance/tests.py
@@ -10,6 +10,7 @@ from .models import (
Base,
Chef,
CommonInfo,
+ CustomSupplier,
GrandChild,
GrandParent,
ItalianRestaurant,
@@ -191,6 +192,22 @@ class ModelInheritanceTests(TestCase):
sql = query["sql"]
self.assertIn("INSERT INTO", sql, sql)
+ def test_create_copy_with_inherited_m2m(self):
+ restaurant = Restaurant.objects.create()
+ supplier = CustomSupplier.objects.create(
+ name="Central market", address="944 W. Fullerton"
+ )
+ supplier.customers.set([restaurant])
+ old_customers = supplier.customers.all()
+ supplier.pk = None
+ supplier.id = None
+ supplier._state.adding = True
+ supplier.save()
+ supplier.customers.set(old_customers)
+ supplier = Supplier.objects.get(pk=supplier.pk)
+ self.assertCountEqual(supplier.customers.all(), old_customers)
+ self.assertSequenceEqual(supplier.customers.all(), [restaurant])
+
def test_eq(self):
# Equality doesn't transfer in multitable inheritance.
self.assertNotEqual(Place(id=1), Restaurant(id=1))