Langchain-Chatchat/server/db/base.py

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from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
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from configs.model_config import SQLALCHEMY_DATABASE_URI
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engine = create_engine(SQLALCHEMY_DATABASE_URI)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()