From f40c3842dc4cebbf1eb02379a492acb1d0c87605 Mon Sep 17 00:00:00 2001
From: Yuneng Jiang <yuneng@berri.ai>
Date: Mon, 7 Sep 2026 10:08:19 -0700
Subject: [PATCH] fix(router): serialize heuristic tuning quota filters for
 Prisma

---
 litellm/repositories/model_repository.py      |  3 +--
 .../repositories/test_repositories.py         | 22 ++++++++++++++++++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/litellm/repositories/model_repository.py b/litellm/repositories/model_repository.py
index 540f197044f..d24eb8ffc62 100644
--- a/litellm/repositories/model_repository.py
+++ b/litellm/repositories/model_repository.py
@@ -4,7 +4,6 @@ Model repository for database operations on LiteLLM_ProxyModelTable.
 
 import json
 from collections.abc import Mapping, Sequence
-from types import MappingProxyType
 from typing import TYPE_CHECKING, Any, Final, Protocol
 
 from litellm.models.model import LiteLLM_ProxyModelTable
@@ -109,7 +108,7 @@ class ModelRepository(BaseRepository[LiteLLM_ProxyModelTable]):
     async def find_all_except(self, model_id: str) -> Sequence[LiteLLM_ProxyModelTable]:
         """Find every model except the row currently being updated."""
         records: Final = await self.table.find_many(
-            where=MappingProxyType({"model_id": MappingProxyType({"not": model_id})})
+            where={"model_id": {"not": model_id}}  # mutable-ok: Prisma requires plain dicts for query serialization
         )
         return tuple(self._to_model_list(records))
 
diff --git a/tests/test_litellm/repositories/test_repositories.py b/tests/test_litellm/repositories/test_repositories.py
index 758d379f22c..a890d7ceed0 100644
--- a/tests/test_litellm/repositories/test_repositories.py
+++ b/tests/test_litellm/repositories/test_repositories.py
@@ -4,10 +4,13 @@ Tests for gateway repository layer.
 
 import json
 from datetime import datetime
-from typing import Any, Dict, List, Optional
+from types import SimpleNamespace
+from typing import Any, Dict, Final, List, Optional
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
+from prisma import models as prisma_models
+from prisma.builder import QueryBuilder
 
 from litellm.models.base import DomainModel
 from litellm.models.budget import LiteLLM_BudgetTable
@@ -307,6 +310,23 @@ class TestModelRepository:
         client = MockPrismaClient()
         return ModelRepository(client)
 
+    @pytest.mark.asyncio
+    async def test_find_all_except_serializes_exclusion_for_prisma(self) -> None:
+        find_many: Final = AsyncMock(return_value=[])
+        client: Final = SimpleNamespace(
+            db=SimpleNamespace(litellm_proxymodeltable=SimpleNamespace(find_many=find_many))
+        )
+
+        await ModelRepository(client).find_all_except("current-model")
+
+        find_many.assert_awaited_once()
+        query: Final = QueryBuilder(
+            method="find_many",
+            model=prisma_models.LiteLLM_ProxyModelTable,
+            arguments=find_many.call_args.kwargs,
+        ).build_query()
+        assert 'where: { model_id: { not: "current-model" } }' in " ".join(query.split())
+
     def test_table_is_wrapped_for_config_sync(self, repo):
         from litellm.proxy.common_utils.config_sync_pubsub import (
             _PublishOnWriteActions,