from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import MetaData

convention = {
    "ix": 'ix_%(column_0_label)s',
    "uk": "uk_%(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)
# instantiate database object
db = SQLAlchemy(metadata=metadata)
