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/embeddings/laser.py

@@ -2,8 +2,8 @@ from typing import Any, Dict, List, Optional
 
 import numpy as np
 from langchain_core.embeddings import Embeddings
-from langchain_core.pydantic_v1 import BaseModel
 from langchain_core.utils import pre_init
+from pydantic import BaseModel, ConfigDict
 
 LASER_MULTILINGUAL_MODEL: str = "laser2"
 
@@ -27,7 +27,7 @@ class LaserEmbeddings(BaseModel, Embeddings):
         embeddings = encoder.encode_sentences(["Hello", "World"])
     """
 
-    lang: Optional[str]
+    lang: Optional[str] = None
     """The language or language code you'd like to use
     If empty, this implementation will default
     to using a multilingual earlier LASER encoder model (called laser2)
@@ -35,10 +35,11 @@ class LaserEmbeddings(BaseModel, Embeddings):
     https://github.com/facebookresearch/flores/blob/main/flores200/README.md#languages-in-flores-200
     """
 
-    _encoder_pipeline: Any  # : :meta private:
+    _encoder_pipeline: Any = None  # : :meta private:
 
-    class Config:
-        extra = "forbid"
+    model_config = ConfigDict(
+        extra="forbid",
+    )
 
     @pre_init
     def validate_environment(cls, values: Dict) -> Dict: