fix: add missing text_lemmatized in AsyncMemory._create_memory (#4886)

mem0/memory/main.py

@@ -3008,6 +3008,7 @@ class AsyncMemory(MemoryBase):
         if "created_at" not in new_metadata:
             new_metadata["created_at"] = datetime.now(timezone.utc).isoformat()
         new_metadata["updated_at"] = new_metadata["created_at"]
+        new_metadata["text_lemmatized"] = lemmatize_for_bm25(data)
 
         await asyncio.to_thread(
             self.vector_store.insert,

tests/test_memory.py

@@ -854,3 +854,84 @@ def test_get_all_rejects_user_id_kwarg(mock_sqlite, mock_llm_factory, mock_vecto
 
     with pytest.raises(ValueError, match=r"user_id.*filters"):
         memory.get_all(user_id="u1")
+
+
+# ─── Regression: AsyncMemory._create_memory must store text_lemmatized ─────────
+@patch('mem0.utils.factory.EmbedderFactory.create')
+@patch('mem0.utils.factory.VectorStoreFactory.create')
+@patch('mem0.utils.factory.LlmFactory.create')
+@patch('mem0.memory.storage.SQLiteManager')
+def test_sync_create_memory_stores_text_lemmatized(mock_sqlite, mock_llm_factory, mock_vector_factory, mock_embedder_factory):
+    """Sync Memory._create_memory must include text_lemmatized in payload for BM25 keyword search."""
+    embedder = MagicMock()
+    embedder.embed.return_value = [0.1, 0.2, 0.3]
+    mock_embedder_factory.return_value = embedder
+
+    mock_vector_store = MagicMock()
+    mock_vector_store.insert.return_value = None
+    telemetry_vector_store = MagicMock()
+    mock_vector_factory.side_effect = [mock_vector_store, telemetry_vector_store]
+
+    mock_llm_factory.return_value = MagicMock()
+    mock_sqlite.return_value = MagicMock()
+
+    from mem0.memory.main import Memory as MemoryClass
+    memory = MemoryClass(MemoryConfig())
+
+    data = "I love hiking in the mountains"
+    embeddings = {data: [0.1, 0.2, 0.3]}
+    metadata = {"user_id": "test_user"}
+
+    memory._create_memory(data, embeddings, metadata)
+
+    # Check that text_lemmatized was stored in the payload
+    insert_call = mock_vector_store.insert.call_args
+    payload = insert_call.kwargs.get("payloads") or insert_call[1].get("payloads")
+    assert payload is not None and len(payload) == 1
+    assert "text_lemmatized" in payload[0], "Sync _create_memory must store text_lemmatized for BM25"
+    assert payload[0]["text_lemmatized"] != "", "text_lemmatized must not be empty"
+
+
+@pytest.mark.asyncio
+@patch('mem0.utils.factory.EmbedderFactory.create')
+@patch('mem0.utils.factory.VectorStoreFactory.create')
+@patch('mem0.utils.factory.LlmFactory.create')
+@patch('mem0.memory.storage.SQLiteManager')
+async def test_async_create_memory_stores_text_lemmatized(mock_sqlite, mock_llm_factory, mock_vector_factory, mock_embedder_factory):
+    """
+    Regression test: AsyncMemory._create_memory must include text_lemmatized
+    in the vector store payload.
+
+    Without text_lemmatized, memories created via AsyncMemory with infer=False
+    are invisible to BM25 keyword search, silently degrading search recall for
+    all async users.
+    """
+    embedder = MagicMock()
+    embedder.embed.return_value = [0.1, 0.2, 0.3]
+    mock_embedder_factory.return_value = embedder
+
+    mock_vector_store = MagicMock()
+    mock_vector_store.insert.return_value = None
+    mock_vector_factory.return_value = mock_vector_store
+
+    mock_llm_factory.return_value = MagicMock()
+    mock_sqlite.return_value = MagicMock()
+
+    from mem0.memory.main import AsyncMemory
+    memory = AsyncMemory(MemoryConfig())
+
+    data = "I love hiking in the mountains"
+    embeddings = {data: [0.1, 0.2, 0.3]}
+    metadata = {"user_id": "test_user"}
+
+    await memory._create_memory(data, embeddings, metadata)
+
+    # Check that text_lemmatized was stored in the payload
+    insert_call = mock_vector_store.insert.call_args
+    payload = insert_call.kwargs.get("payloads") or insert_call[1].get("payloads")
+    assert payload is not None and len(payload) == 1
+    assert "text_lemmatized" in payload[0], (
+        "AsyncMemory._create_memory must store text_lemmatized for BM25 keyword search"
+    )
+    assert payload[0]["text_lemmatized"] != "", "text_lemmatized must not be empty"
+