core: use run tree post/patch (#31500)

Use run post/patch

libs/core/langchain_core/tracers/langchain.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 import logging
-import warnings
 from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime, timezone
 from typing import TYPE_CHECKING, Any, Optional, Union
@@ -12,7 +11,6 @@ from uuid import UUID
 from langsmith import Client
 from langsmith import run_trees as rt
 from langsmith import utils as ls_utils
-from pydantic import PydanticDeprecationWarning
 from tenacity import (
     Retrying,
     retry_if_exception_type,
@@ -67,21 +65,6 @@ def _get_executor() -> ThreadPoolExecutor:
     return _EXECUTOR
 
 
-def _run_to_dict(run: Run, *, exclude_inputs: bool = False) -> dict:
-    # TODO: Update once langsmith moves to Pydantic V2 and we can swap run.dict for
-    # run.model_dump
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore", category=PydanticDeprecationWarning)
-
-        res = {
-            **run.dict(exclude={"child_runs", "inputs", "outputs"}),
-            "outputs": run.outputs,
-        }
-        if not exclude_inputs:
-            res["inputs"] = run.inputs
-    return res
-
-
 class LangChainTracer(BaseTracer):
     """Implementation of the SharedTracer that POSTS to the LangChain endpoint."""
 
@@ -218,18 +201,11 @@ class LangChainTracer(BaseTracer):
     def _persist_run_single(self, run: Run) -> None:
         """Persist a run."""
         try:
-            run_dict = _run_to_dict(run)
+            run.extra["runtime"] = get_runtime_environment()
-            run_dict["tags"] = self._get_tags(run)
+            run.tags = self._get_tags(run)
-            extra = run_dict.get("extra", {})
+            if run.ls_client is not self.client:
-            extra["runtime"] = get_runtime_environment()
+                run.ls_client = self.client
-            run_dict["extra"] = extra
+            run.post()
-            inputs_ = run_dict.get("inputs")
-            if inputs_ and (len(inputs_) > 1 or bool(next(iter(inputs_.values())))):
-                inputs_is_truthy = True
-            else:
-                inputs_is_truthy = False
-            run.extra["inputs_is_truthy"] = inputs_is_truthy
-            self.client.create_run(**run_dict, project_name=self.project_name)
         except Exception as e:
             # Errors are swallowed by the thread executor so we need to log them here
             log_error_once("post", e)
@@ -238,10 +214,7 @@ class LangChainTracer(BaseTracer):
     def _update_run_single(self, run: Run) -> None:
         """Update a run."""
         try:
-            exclude_inputs = run.extra.get("inputs_is_truthy", False)
+            run.patch(exclude_inputs=run.extra.get("inputs_is_truthy", False))
-            run_dict = _run_to_dict(run, exclude_inputs=exclude_inputs)
-            run_dict["tags"] = self._get_tags(run)
-            self.client.update_run(run.id, **run_dict)
         except Exception as e:
             # Errors are swallowed by the thread executor so we need to log them here
             log_error_once("patch", e)

libs/core/langchain_core/version.py

@@ -1,3 +1,3 @@
 """langchain-core version information and utilities."""
 
-VERSION = "0.3.63"
+VERSION = "0.3.64"

libs/core/pyproject.toml

@@ -7,7 +7,7 @@ authors = []
 license = {text = "MIT"}
 requires-python = ">=3.9"
 dependencies = [
-    "langsmith<0.4,>=0.1.126",
+    "langsmith<0.4,>=0.3.45",
     "tenacity!=8.4.0,<10.0.0,>=8.1.0",
     "jsonpatch<2.0,>=1.33",
     "PyYAML>=5.3",
@@ -16,7 +16,7 @@ dependencies = [
     "pydantic>=2.7.4",
 ]
 name = "langchain-core"
-version = "0.3.63"
+version = "0.3.64"
 description = "Building applications with LLMs through composability"
 readme = "README.md"
 

libs/core/tests/unit_tests/document_loaders/test_langsmith.py

@@ -53,6 +53,8 @@ def test_lazy_load() -> None:
         }
         expected.append(
             Document(example.inputs["first"]["second"].upper(), metadata=metadata)
+            if example.inputs
+            else None
         )
     actual = list(loader.lazy_load())
     assert expected == actual

libs/core/tests/unit_tests/runnables/test_tracing_interops.py

@@ -130,7 +130,7 @@ def test_config_traceable_handoff() -> None:
     parent_run_id = None
     for name in ordered_names:
         id_ = name_to_body[name]["id"]
-        parent_run_id_ = name_to_body[name]["parent_run_id"]
+        parent_run_id_ = name_to_body[name].get("parent_run_id")
         if parent_run_id_ is not None:
             assert parent_run_id == parent_run_id_
         assert name in name_to_body
@@ -199,7 +199,7 @@ async def test_config_traceable_async_handoff() -> None:
     parent_run_id = None
     for name in ordered_names:
         id_ = name_to_body[name]["id"]
-        parent_run_id_ = name_to_body[name]["parent_run_id"]
+        parent_run_id_ = name_to_body[name].get("parent_run_id")
         if parent_run_id_ is not None:
             assert parent_run_id == parent_run_id_
         assert name in name_to_body

libs/core/tests/unit_tests/tracers/test_langchain.py

@@ -139,7 +139,7 @@ class LangChainProjectNameTest(unittest.TestCase):
                 projects = []
 
                 def mock_create_run(**kwargs: Any) -> Any:
-                    projects.append(kwargs.get("project_name"))  # noqa: B023
+                    projects.append(kwargs.get("session_name"))  # noqa: B023
                     return unittest.mock.MagicMock()
 
                 client.create_run = mock_create_run