update to Django 5.1

Author: timgraham

.github/workflows/test-python.yml

@@ -33,7 +33,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: 'mongodb-forks/django'
-          ref: 'mongodb-5.0.x'
+          ref: 'mongodb-5.1.x'
           path: 'django_repo'
           persist-credentials: false
       - name: Install system packages for Django's Python test dependencies

django_mongodb_backend/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "5.0.0a1"
+__version__ = "5.1.0a1"
 
 # Check Django compatibility before other imports which may fail if the
 # wrong version of Django is installed.

django_mongodb_backend/compiler.py

@@ -91,7 +91,7 @@ def _prepare_expressions_for_pipeline(self, expression, target, annotation_group
                 rhs = sub_expr.as_mql(self, self.connection, resolve_inner_expression=True)
                 group[alias] = {"$addToSet": rhs}
                 replacing_expr = sub_expr.copy()
-                replacing_expr.set_source_expressions([inner_column])
+                replacing_expr.set_source_expressions([inner_column, None])
             else:
                 group[alias] = sub_expr.as_mql(self, self.connection)
                 replacing_expr = inner_column

django_mongodb_backend/features.py

@@ -46,6 +46,12 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     uses_savepoints = False
 
     _django_test_expected_failures = {
+        # $concat only supports strings, not int
+        "db_functions.text.test_concat.ConcatTests.test_concat_non_str",
+        # QuerySet.order_by() with annotation transform doesn't work:
+        # "Expression $mod takes exactly 2 arguments. 1 were passed in"
+        # https://github.com/django/django/commit/b0ad41198b3e333f57351e3fce5a1fb47f23f376
+        "aggregation.tests.AggregateTestCase.test_order_by_aggregate_transform",
         # 'NulledTransform' object has no attribute 'as_mql'.
         "lookup.tests.LookupTests.test_exact_none_transform",
         # "Save with update_fields did not affect any rows."
@@ -76,6 +82,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         # Connection creation doesn't follow the usual Django API.
         "backends.tests.ThreadTests.test_pass_connection_between_threads",
         "backends.tests.ThreadTests.test_default_connection_thread_local",
+        "test_utils.tests.DisallowedDatabaseQueriesTests.test_disallowed_thread_database_connection",
         # Object of type ObjectId is not JSON serializable.
         "auth_tests.test_views.LoginTest.test_login_session_without_hash_session_key",
         # GenericRelation.value_to_string() assumes integer pk.
@@ -175,6 +182,7 @@ def django_test_expected_failures(self):
             "fixtures.tests.FixtureLoadingTests.test_loading_and_dumping",
             "m2m_through_regress.test_multitable.MultiTableTests.test_m2m_prefetch_proxied",
             "m2m_through_regress.test_multitable.MultiTableTests.test_m2m_prefetch_reverse_proxied",
+            "many_to_many.tests.ManyToManyQueryTests.test_prefetch_related_no_queries_optimization_disabled",
             "many_to_many.tests.ManyToManyTests.test_add_after_prefetch",
             "many_to_many.tests.ManyToManyTests.test_add_then_remove_after_prefetch",
             "many_to_many.tests.ManyToManyTests.test_clear_after_prefetch",
@@ -386,7 +394,11 @@ def django_test_expected_failures(self):
             "delete.tests.DeletionTests.test_only_referenced_fields_selected",
             "expressions.tests.ExistsTests.test_optimizations",
             "lookup.tests.LookupTests.test_in_ignore_none",
+            "lookup.tests.LookupTests.test_lookup_direct_value_rhs_unwrapped",
             "lookup.tests.LookupTests.test_textfield_exact_null",
+            "many_to_many.tests.ManyToManyQueryTests.test_count_join_optimization_disabled",
+            "many_to_many.tests.ManyToManyQueryTests.test_exists_join_optimization_disabled",
+            "many_to_many.tests.ManyToManyTests.test_custom_default_manager_exists_count",
             "migrations.test_commands.MigrateTests.test_migrate_syncdb_app_label",
             "migrations.test_commands.MigrateTests.test_migrate_syncdb_deferred_sql_executed_with_schemaeditor",
             "queries.tests.ExistsSql.test_exists",
@@ -434,6 +446,7 @@ def django_test_expected_failures(self):
             "raw_query.tests.RawQueryTests",
             "schema.test_logging.SchemaLoggerTests.test_extra_args",
             "schema.tests.SchemaTests.test_remove_constraints_capital_letters",
+            "test_utils.tests.AllowedDatabaseQueriesTests.test_allowed_database_copy_queries",
             "timezones.tests.LegacyDatabaseTests.test_cursor_execute_accepts_naive_datetime",
             "timezones.tests.LegacyDatabaseTests.test_cursor_execute_returns_naive_datetime",
             "timezones.tests.LegacyDatabaseTests.test_raw_sql",

django_mongodb_backend/query_utils.py

@@ -12,6 +12,8 @@ def process_lhs(node, compiler, connection):
         # node is a Func or Expression, possibly with multiple source expressions.
         result = []
         for expr in node.get_source_expressions():
+            if expr is None:
+                continue
             try:
                 result.append(expr.as_mql(compiler, connection))
             except FullResultSet:

django_mongodb_backend/schema.py

@@ -31,8 +31,8 @@ def create_model(self, model):
 
     def _create_model_indexes(self, model):
         """
-        Create all indexes (field indexes & uniques, Meta.index_together,
-        Meta.unique_together, Meta.constraints, Meta.indexes) for the model.
+        Create all indexes (field indexes & uniques, Meta.unique_together,
+        Meta.constraints, Meta.indexes) for the model.
         """
         if not model._meta.managed or model._meta.proxy or model._meta.swapped:
             return
@@ -42,9 +42,6 @@ def _create_model_indexes(self, model):
                 self._add_field_index(model, field)
             elif self._field_should_have_unique(field):
                 self._add_field_unique(model, field)
-        # Meta.index_together (RemovedInDjango51Warning)
-        for field_names in model._meta.index_together:
-            self._add_composed_index(model, field_names)
         # Meta.unique_together
         if model._meta.unique_together:
             self.alter_unique_together(model, [], model._meta.unique_together)