from flask_appbuilder import Model
from sqlalchemy import Column, ForeignKey, Integer
from sqlalchemy.orm import relationship

from myapp import security_manager
from myapp.models.helpers import AuditMixinNullable


class UserAttribute(Model, AuditMixinNullable):

    """
    Custom attributes attached to the user.

    Extending the user attribute is tricky due to its dependency on the
    authentication typew an circular dependencies in Myapp. Instead, we use
    a custom model for adding attributes.

    """

    __tablename__ = "user_attribute"
    id = Column(Integer, primary_key=True)  # pylint: disable=invalid-name
    user_id = Column(Integer, ForeignKey("ab_user.id"))
    user = relationship(
        security_manager.user_model, backref="extra_attributes", foreign_keys=[user_id]
    )