PyCS/pycs/database/LabelProvider.py

from pycs import db
from pycs.database.base import NamedBaseModel

class LabelProvider(NamedBaseModel):
    """
    database class for label providers
    """

    description = db.Column(db.String)
    root_folder = db.Column(db.String, nullable=False, unique=True)

    # relationships to other models
    projects = db.relationship("Project", backref="label_provider", lazy=True)