update to Django 5.1

.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/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "5.0a0"
+__version__ = "5.1a0"
 
 # Check Django compatibility before other imports which may fail if the
 # wrong version of Django is installed.

django_mongodb/aggregates.py

@@ -1,5 +1,5 @@
 from django.db.models.aggregates import Aggregate, Count, StdDev, Variance
-from django.db.models.expressions import Case, Value, When
+from django.db.models.expressions import Case, Col, Value, When
 from django.db.models.lookups import IsNull
 
 from .query_utils import process_lhs
@@ -16,7 +16,7 @@ def aggregate(
     resolve_inner_expression=False,
     **extra_context,  # noqa: ARG001
 ):
-    if self.filter:
+    if self.filter and not isinstance(self.filter, Col):
         node = self.copy()
         node.filter = None
         source_expressions = node.get_source_expressions()

django_mongodb/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."
@@ -170,6 +176,7 @@ 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",
@@ -227,8 +234,6 @@ def django_test_expected_failures(self):
             "expressions.tests.BasicExpressionsTests.test_nested_subquery_outer_ref_with_autofield",
             "model_fields.test_foreignkey.ForeignKeyTests.test_to_python",
             "queries.test_qs_combinators.QuerySetSetOperationTests.test_order_raises_on_non_selected_column",
-            "queries.tests.RelatedLookupTypeTests.test_values_queryset_lookup",
-            "queries.tests.ValuesSubqueryTests.test_values_in_subquery",
         },
         "Cannot use QuerySet.delete() when querying across multiple collections on MongoDB.": {
             "admin_changelist.tests.ChangeListTests.test_distinct_for_many_to_many_at_second_level_in_search_fields",
@@ -381,7 +386,11 @@ 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",

django_mongodb/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: