Fixed #31947 -- Made QuerySet.update_or_create() reuse get_or_create().

django/db/models/query.py

@@ -573,7 +573,17 @@ class QuerySet:
             return self.get(**kwargs), False
         except self.model.DoesNotExist:
             params = self._extract_model_params(defaults, **kwargs)
-            return self._create_object_from_params(kwargs, params)
+            # Try to create an object using passed params.
+            try:
+                with transaction.atomic(using=self.db):
+                    params = dict(resolve_callables(params))
+                    return self.create(**params), True
+            except IntegrityError:
+                try:
+                    return self.get(**kwargs), False
+                except self.model.DoesNotExist:
+                    pass
+                raise
 
     def update_or_create(self, defaults=None, **kwargs):
         """
@@ -585,42 +595,20 @@ class QuerySet:
         defaults = defaults or {}
         self._for_write = True
         with transaction.atomic(using=self.db):
-            try:
-                obj = self.select_for_update().get(**kwargs)
-            except self.model.DoesNotExist:
-                params = self._extract_model_params(defaults, **kwargs)
-                # Lock the row so that a concurrent update is blocked until
-                # after update_or_create() has performed its save.
-                obj, created = self._create_object_from_params(kwargs, params, lock=True)
-                if created:
-                    return obj, created
+            # Lock the row so that a concurrent update is blocked until
+            # update_or_create() has performed its save.
+            obj, created = self.select_for_update().get_or_create(defaults, **kwargs)
+            if created:
+                return obj, created
             for k, v in resolve_callables(defaults):
                 setattr(obj, k, v)
             obj.save(using=self.db)
         return obj, False
 
-    def _create_object_from_params(self, lookup, params, lock=False):
-        """
-        Try to create an object using passed params. Used by get_or_create()
-        and update_or_create().
-        """
-        try:
-            with transaction.atomic(using=self.db):
-                params = dict(resolve_callables(params))
-                obj = self.create(**params)
-            return obj, True
-        except IntegrityError:
-            try:
-                qs = self.select_for_update() if lock else self
-                return qs.get(**lookup), False
-            except self.model.DoesNotExist:
-                pass
-            raise
-
     def _extract_model_params(self, defaults, **kwargs):
         """
         Prepare `params` for creating a model instance based on the given
-        kwargs; for use by get_or_create() and update_or_create().
+        kwargs; for use by get_or_create().
         """
         defaults = defaults or {}
         params = {k: v for k, v in kwargs.items() if LOOKUP_SEP not in k}