multiple: pydantic 2 compatibility, v0.3 (#26443)

Signed-off-by: ChengZi <chen.zhang@zilliz.com>
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Dan O'Donovan <dan.odonovan@gmail.com>
Co-authored-by: Tom Daniel Grande <tomdgrande@gmail.com>
Co-authored-by: Grande <Tom.Daniel.Grande@statsbygg.no>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: ccurme <chester.curme@gmail.com>
Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
Co-authored-by: Tomaz Bratanic <bratanic.tomaz@gmail.com>
Co-authored-by: ZhangShenao <15201440436@163.com>
Co-authored-by: Friso H. Kingma <fhkingma@gmail.com>
Co-authored-by: ChengZi <chen.zhang@zilliz.com>
Co-authored-by: Nuno Campos <nuno@langchain.dev>
Co-authored-by: Morgante Pell <morgantep@google.com>

libs/community/langchain_community/llms/moonshot.py

@@ -3,8 +3,14 @@ from typing import Any, Dict, List, Optional
 import requests
 from langchain_core.callbacks import CallbackManagerForLLMRun
 from langchain_core.language_models import LLM
-from langchain_core.pydantic_v1 import BaseModel, Field, SecretStr, root_validator
 from langchain_core.utils import convert_to_secret_str, get_from_dict_or_env, pre_init
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    SecretStr,
+    model_validator,
+)
 
 from langchain_community.llms.utils import enforce_stop_tokens
 
@@ -44,8 +50,7 @@ class MoonshotCommon(BaseModel):
     temperature: float = 0.3
     """Temperature parameter (higher values make the model more creative)."""
 
-    class Config:
-        allow_population_by_field_name = True
+    model_config = ConfigDict(populate_by_name=True, protected_namespaces=())
 
     @property
     def lc_secrets(self) -> dict:
@@ -69,8 +74,9 @@ class MoonshotCommon(BaseModel):
     def _invocation_params(self) -> Dict[str, Any]:
         return {**{"model": self.model_name}, **self._default_params}
 
-    @root_validator(pre=True)
-    def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+    @model_validator(mode="before")
+    @classmethod
+    def build_extra(cls, values: Dict[str, Any]) -> Any:
         """Build extra parameters.
         Override the superclass method, prevent the model parameter from being
         overridden.
@@ -112,8 +118,9 @@ class Moonshot(MoonshotCommon, LLM):
             moonshot = Moonshot(model="moonshot-v1-8k")
     """
 
-    class Config:
-        allow_population_by_field_name = True
+    model_config = ConfigDict(
+        populate_by_name=True,
+    )
 
     def _call(
         self,