fix(qdrant): raise ValueError for unsupported filter operators

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

mem0/vector_stores/qdrant.py

@@ -180,8 +180,11 @@ class Qdrant(VectorStoreBase):
             text = value.get("contains") or value.get("icontains")
             return FieldCondition(key=key, match=MatchText(text=text))
         else:
-            # Unknown operator — fall back to equality
-            return FieldCondition(key=key, match=MatchValue(value=value))
+            supported = {"eq", "ne", "gt", "gte", "lt", "lte", "in", "nin", "contains", "icontains"}
+            raise ValueError(
+                f"Unsupported filter operator(s) for field '{key}': {ops}. "
+                f"Supported operators: {supported}"
+            )
 
     def _create_filter(self, filters: dict) -> Filter:
         """

tests/vector_stores/test_qdrant.py

@@ -535,5 +535,11 @@ class TestQdrantEnhancedFilters(unittest.TestCase):
         self.assertEqual(result.must[0].range.gte, 5)
         self.assertEqual(result.must[0].range.lte, 10)
 
+    def test_unknown_operator_raises_error(self):
+        """Unknown operator dict should raise ValueError, not ValidationError."""
+        with self.assertRaises(ValueError) as ctx:
+            self.qdrant._build_field_condition("field", {"unknown_op": "foo"})
+        self.assertIn("Unsupported", str(ctx.exception))
+
     def tearDown(self):
         del self.qdrant