fix: Fix update_or_create for Django 4.2

Add update_or_create method to MultilingualQuerySet ...

Refs #682, #683

.github/workflows/test.yml

@@ -40,8 +40,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10"]
-        django: ["3.2", "4.0"]
+        python: ["3.8", "3.9", "3.10", "3.11"]
+        django: ["3.2", "4.0", "4.2"]
         database: ["sqlite", "postgres", "mysql"]
         include:
           - python: "3.7"

modeltranslation/manager.py

@@ -243,6 +243,21 @@ def select_related(self, *fields, **kwargs):
                 new_args.append(rewrite_lookup_key(self.model, key))
         return super(MultilingualQuerySet, self).select_related(*new_args, **kwargs)
 
+    def update_or_create(self, defaults=None, **kwargs):
+        """
+        Updates or creates a database record with the specified kwargs. The method first
+        rewrites the keys in the defaults dictionary using a custom function named
+        `rewrite_lookup_key`. This ensures that the keys are valid for the current model
+        before calling the inherited update_or_create() method from the super class.
+        Returns the updated or created model instance.
+        """
+        if defaults is not None:
+            rewritten_defaults = {}
+            for key, value in defaults.items():
+                rewritten_defaults[rewrite_lookup_key(self.model, key)] = value
+            defaults = rewritten_defaults
+        return super().update_or_create(defaults=defaults, **kwargs)
+
     # This method was not present in django-linguo
     def _rewrite_col(self, col):
         """Django >= 1.7 column name rewriting"""

modeltranslation/tests/tests.py

@@ -463,6 +463,42 @@ def test_constructor(self):
         )
         self._test_constructor(keywords)
 
+    def test_update_or_create(self):
+        """
+        Test that update_or_create works as expected
+        """
+        # Create new object
+        obj = models.TestModel.objects.create(title_de='old de', title_en='old en')
+
+        # Update existing object
+        instance, created = models.TestModel.objects.update_or_create(
+            pk=obj.pk, defaults={'title': 'NEW DE TITLE'}
+        )
+        assert created is False
+        assert instance.title == 'NEW DE TITLE'
+        assert instance.title_en == 'old en'
+        assert instance.title_de == 'NEW DE TITLE'
+
+        # Check that the translation fields are correctly saved and provide the
+        # correct value when retrieving them again.
+        instance.refresh_from_db()
+        assert instance.title == 'NEW DE TITLE'
+        assert instance.title_en == 'old en'
+        assert instance.title_de == 'NEW DE TITLE'
+
+        # Create new object
+        instance, created = models.TestModel.objects.update_or_create(
+            title_de='old de', title_en='old en'
+        )
+
+        # Check that the translation fields are correctly saved and provide the
+        # correct value when retrieving them again.
+        assert created is True
+        instance.refresh_from_db()
+        assert instance.title == 'old de'
+        assert instance.title_en == 'old en'
+        assert instance.title_de == 'old de'
+
 
 class ModeltranslationTransactionTest(ModeltranslationTransactionTestBase):
     def test_unique_nullable_field(self):