from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import MetaData

convention = {
    "ix": "ix_%(column_0_label)s",
    "uq": "uq_%(table_name)s_%(column_0_name)s",
    "ck": "ck_%(table_name)s_%(constraint_name)s",
    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
    "pk": "pk_%(table_name)s",
}

metadata = MetaData(naming_convention=convention)

db = SQLAlchemy(
    metadata=metadata,
    session_options={
        "autoflush": False,
        "autocommit": False,
        "expire_on_commit": False,
    },
)