fix incorrect $project with QuerySet.distinct()

Author: WaVEV

django_mongodb/compiler.py

@@ -368,8 +368,12 @@ def build_query(self, columns=None):
  )
  if not query.aggregation_pipeline:
  query.aggregation_pipeline = []
- query.aggregation_pipeline.append({"$group": {"_id": distinct_fields}})
- query.project_fields = {key: f"$_id.{key}" for key in distinct_fields}
+ query.aggregation_pipeline.extend(
+ [
+ {"$group": {"_id": distinct_fields}},
+ {"$project": {key: f"$_id.{key}" for key in distinct_fields}},
+ ]
+ )
  else:
  # Otherwise, project fields without grouping.
  query.project_fields = self.get_project_fields(columns, ordering_fields)

django_mongodb/features.py

@@ -88,17 +88,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
  "queries.tests.ValuesSubqueryTests.test_values_in_subquery",
  # Wrong results for distinct() queries.
  "admin_filters.tests.ListFiltersTests.test_emptylistfieldfilter_genericrelation",
- "admin_filters.tests.ListFiltersTests.test_facets_always",
- "admin_filters.tests.ListFiltersTests.test_facets_disallowed",
  "admin_filters.tests.ListFiltersTests.test_facets_filter",
- "admin_filters.tests.ListFiltersTests.test_facets_no_filter",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_foreignkey",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_foreignkey_default_ordering",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_foreignkey_ordering",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_foreignkey_reverse_relationships",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_manytomany",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_manytomany_reverse_relationships",
- "admin_filters.tests.ListFiltersTests.test_relatedonlyfieldlistfilter_underscorelookup_foreignkey",
  }
  # $bitAnd, #bitOr, and $bitXor are new in MongoDB 6.3.
  _django_test_expected_failures_bitwise = {