app/database.py

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base
from .core.config import settings

DATABASE_URL = f"mysql+pymysql://{settings.MYSQL_USER}:{settings.MYSQL_PASSWORD}@{settings.MYSQL_HOST}/{settings.MYSQL_DB}"

engine = create_engine(
    DATABASE_URL,
    pool_size=10,          
    max_overflow=20,       
    pool_recycle=3600,     
    pool_pre_ping=True,
    connect_args={"init_command": "SET time_zone='+00:00'"}
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()