fix(proxy_server.py): return none if no model list set in router

https://github.com/BerriAI/litellm/issues/2979

litellm/proxy/proxy_server.py

@@ -2494,9 +2494,6 @@ class ProxyConfig:
                 verbose_proxy_logger.debug(f"_model_list: {_model_list}")
                 llm_router = litellm.Router(model_list=_model_list)
                 verbose_proxy_logger.debug(f"updated llm_router: {llm_router}")
-                verbose_proxy_logger.debug(
-                    f"llm_router model list: {llm_router.model_list}"
-                )
             else:
                 new_models = await prisma_client.db.litellm_proxymodeltable.find_many()
                 verbose_proxy_logger.debug(f"len new_models: {len(new_models)}")

litellm/router.py

@@ -2306,7 +2306,9 @@ class Router:
         return self.model_names
 
     def get_model_list(self):
-        return self.model_list
+        if hasattr(self, "model_list"):
+            return self.model_list
+        return None
 
     def _get_client(self, deployment, kwargs, client_type=None):
         """