Edits.

Author: WaVEV

django_mongodb/indexes.py

@@ -33,11 +33,11 @@ def where_node_idx(self, compiler, connection):
     if self.connector == AND:
         operator = "$and"
     elif self.connector == XOR:
-        raise NotSupportedError("Xor in indexes is not supported")
+        raise NotSupportedError("Xor in indexes is not supported.")
     else:
         operator = "$or"
     if self.negated:
-        raise NotSupportedError("Negated field in indexes is not supported")
+        raise NotSupportedError("Negated field in indexes is not supported.")
     children_mql = []
     for child in self.children:
         try:

tests/indexes_/test_mql.py

@@ -15,7 +15,6 @@ def test_not_supported(self):
         with connection.schema_editor() as editor:
             index = Index(
                 name="not_supported",
-                # This is changed
                 fields=["headline"],
                 condition=Q(pk__isnull=True) & Q(pk__contains="test1"),
             )
@@ -35,13 +34,28 @@ def test_not_supported(self):
             editor.remove_index(index=index, model=Article)
 
     def test_raises_on_negated(self):
-        with self.assertRaises(NotSupportedError), connection.schema_editor() as editor:
+        with self.assertRaises(
+            NotSupportedError
+        ) as context_manager, connection.schema_editor() as editor:
             Index(
                 name="raises_on_negated",
-                # This is changed
                 fields=["headline"],
                 condition=~Q(pk=True),
             )._get_condition_mql(Article, schema_editor=editor)
+        self.assertEqual(
+            context_manager.exception.args[0], "Negated field in indexes is not supported."
+        )
+
+    def test_raises_on_xor(self):
+        with self.assertRaises(
+            NotSupportedError
+        ) as context_manager, connection.schema_editor() as editor:
+            Index(
+                name="raises_on_negated",
+                fields=["headline"],
+                condition=Q(pk=True) ^ Q(pk=False),
+            )._get_condition_mql(Article, schema_editor=editor)
+        self.assertEqual(context_manager.exception.args[0], "Xor in indexes is not supported.")
 
     def test_composite_index(self):
         with connection.schema_editor() as editor:
@@ -52,10 +66,15 @@ def test_composite_index(self):
                 condition=Q(number__gte=3) & (Q(text__gt="test1") | Q(text__in=["A", "B"])),
             )
             index._get_condition_mql(Article, schema_editor=editor)
+            target = {
+                "$and": [
+                    {"number": {"$gte": 3}},
+                    {"$or": [{"text": {"$gt": "test1"}}, {"text": {"$in": ["A", "B"]}}]},
+                ]
+            }
             self.assertEqual(
-                "{'$and': [{'number': {'$gte': 3}}, {'$or': [{'text': {'$gt': 'test1'}}, "
-                "{'text': {'$in': ['A', 'B']}}]}]}",
-                str(index._get_condition_mql(Article, schema_editor=editor)),
+                target,
+                index._get_condition_mql(Article, schema_editor=editor),
             )
             editor.add_index(index=index, model=Article)
             with connection.cursor() as cursor: